List of dinosaurs
Encyclopedia
This list of dinosaurs is a comprehensive listing of all genera
Genera
Genera is a commercial operating system and development environment for Lisp machines developed by Symbolics. It is essentially a fork of an earlier operating system originating on the MIT AI Lab's Lisp machines which Symbolics had used in common with LMI and Texas Instruments...
that have ever been included in the superorder Dinosaur
Dinosaur
Dinosaurs are a diverse group of animals of the clade and superorder Dinosauria. They were the dominant terrestrial vertebrates for over 160 million years, from the late Triassic period until the end of the Cretaceous , when the Cretaceous–Paleogene extinction event led to the extinction of...
ia, excluding class Aves (bird
Bird
Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
s, both living and those known only from fossils) and purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (nomen dubium
Nomen dubium
In zoological nomenclature, a nomen dubium is a scientific name that is of unknown or doubtful application...
), or were not formally published (nomen nudum
Nomen nudum
The phrase nomen nudum is a Latin term, meaning "naked name", used in taxonomy...
), as well as junior synonyms
Synonym (taxonomy)
In scientific nomenclature, a synonym is a scientific name that is or was used for a taxon of organisms that also goes by a different scientific name. For example, Linnaeus was the first to give a scientific name to the Norway spruce, which he called Pinus abies...
of more established names, and genera that are no longer considered dinosaurs. Many listed names have been reclassified as everything from bird
Bird
Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
s to crocodilia
Crocodilia
Crocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
ns to petrified wood
Petrified wood
Petrified wood is the name given to a special type of fossilized remains of terrestrial vegetation. It is the result of a tree having turned completely into stone by the process of permineralization...
. The list contains 1372 names, of which approximately 980 are considered either valid dinosaur genera or nomina dubia.
Scope and terminology
There is no official, canonical list of dinosaur genera. The closest is the Dinosaur Genera List, compiled by biological nomenclature expert George OlshevskyGeorge Olshevsky
George Olshevsky is a freelance editor, writer, publisher, amateur paleontologist, and mathematician living in San Diego, California.Olshevsky maintains the comprehensive online Dinosaur Genera List...
, which was first published online in 1995 and is regularly updated. The most authoritative general source in the field is the second (2004) edition of The Dinosauria. The vast majority of citations are based on Olshevsky's list, and all subjective determinations (such as junior synonymy or non-dinosaurian status) are based on The Dinosauria, except where they conflict with primary literature. These exceptions are noted.
Naming conventions and terminology follow the International Code of Zoological Nomenclature
International Code of Zoological Nomenclature
The International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
. Technical terms used include:
- Junior synonymSynonym (taxonomy)In scientific nomenclature, a synonym is a scientific name that is or was used for a taxon of organisms that also goes by a different scientific name. For example, Linnaeus was the first to give a scientific name to the Norway spruce, which he called Pinus abies...
: A name which describes the same taxon as a previously published name. If two or more genera are formally designated and the type specimensBiological typeIn biology, a type is one particular specimen of an organism to which the scientific name of that organism is formally attached...
are later assigned to the same genus, the first to be published (in chronological order) is the senior synonym, and all other instances are junior synonyms. Senior synonyms are generally used, except by special decision of the ICZN (see TyrannosaurusTyrannosaurusTyrannosaurus meaning "tyrant," and sauros meaning "lizard") is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex , commonly abbreviated to T. rex, is a fixture in popular culture. It lived throughout what is now western North America, with a much wider range than other...
), but junior synonyms cannot be used again, even if deprecated. Junior synonymy is often subjective, unless the genera described were both based on the same type specimen. - Nomen nudumNomen nudumThe phrase nomen nudum is a Latin term, meaning "naked name", used in taxonomy...
(Latin for "naked name"): A name that has appeared in print but has not yet been formally published by the standards of the ICZN. Nomina nuda (the plural form) are invalid, and are therefore not italicized as a proper generic name would be. If the name is later formally published, that name is no longer a nomen nudum and will be italicized on this list. Often, the formally published name will differ from any nomina nuda that describe the same specimen. - Nomen oblitumNomen oblitumA nomen oblitum is a technical term, used in zoological nomenclature, for a particular kind of disused scientific name....
(Latin for "forgotten name"): A name that has not been used in the scientific community for more than fifty years after its original proposal. - Preoccupied name: A name that is formally published, but which has already been used for another taxon. This second use is invalid (as are all subsequent uses) and the name must be replaced. Preoccupied names are not valid generic names.
- Nomen dubiumNomen dubiumIn zoological nomenclature, a nomen dubium is a scientific name that is of unknown or doubtful application...
(Latin for "dubious name"): A name describing a fossil with no unique diagnostic features. As this can be an extremely subjective and controversial designation (see HadrosaurusHadrosaurusHadrosaurus is a valid genus of hadrosaurid dinosaur. In 1858, a skeleton of a dinosaur from this genus was the first dinosaur skeleton known from more than isolated teeth to be found in North America. In 1868, it became the first ever mounted dinosaur skeleton...
), this term is not used on this list.
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- AachenosaurusAachenosaurusAachenosaurus is a dubious genus of prehistoric plant. It was named based solely on fossilized fragments of material that were originally thought to be jaw fragments from a duck-billed dinosaur . However, the fossils turned out to be petrified wood, to the great embarrassment of the discoverer...
– actually a piece of petrified woodPetrified woodPetrified wood is the name given to a special type of fossilized remains of terrestrial vegetation. It is the result of a tree having turned completely into stone by the process of permineralization... - AardonyxAardonyxAardonyx is a genus of prosauropod dinosaur. It is known from the type species Aardonyx celestae found from the Lower Jurassic Elliot Formation of South Africa. A. celestae was named after Celeste Yates, who prepared much of the first known fossil material of the species...
- "Abdallahsaurus" – nomen nudum, probably BrachiosaurusBrachiosaurusBrachiosaurus is a genus of sauropod dinosaur from the Jurassic Morrison Formation of North America. It was first described by Elmer S. Riggs in 1903 from fossils found in the Grand River Canyon of western Colorado, in the United States. Riggs named the dinosaur Brachiosaurus altithorax,...
or GiraffatitanGiraffatitanGiraffatitan, meaning "giraffe titan", is a genus of sauropod dinosaur that lived during the late Jurassic Period . It was originally named as an African species of Brachiosaurus... - AbelisaurusAbelisaurusAbelisaurus is a genus of abelisaurid theropod dinosaur from the Late Cretaceous Period of what is now South America. It was a bipedal carnivore that probably reached 7 to 9 meters in length, although it is known from only one partial skull.The generic name recognizes Roberto Abel as the...
- AbrictosaurusAbrictosaurusAbrictosaurus is a genus of heterodontosaurid dinosaur from the Early Jurassic Period of what is now southern Africa. It was a small bipedal herbivore or omnivore, approximately 1.2 meters long, and weighing less than 45 kilograms .This dinosaur is known from the fossil remains of only...
- AbrosaurusAbrosaurusAbrosaurus is a genus of macronarian sauropod dinosaur from the Middle Jurassic Period of what is now Asia, one of many dinosaurs found at the Dashanpu Quarry in the Sichuan Province of China. Like most sauropods, Abrosaurus was a quadrupedal herbivore but it was rather small for a sauropod, not...
- Abydosaurus
- AcanthopholisAcanthopholisAcanthopholis is a genus of ankylosaurian dinosaur in the family Nodosauridae that lived during the Early Cretaceous Period of England....
- AchelousaurusAchelousaurusAchelousaurus is a genus of centrosaurine ceratopsid dinosaurs from the Late Cretaceous Period of what is now North America, dated to 74 million years ago...
- AchillesaurusAchillesaurusAchillesaurus is a genus of alvarezsaurid theropod dinosaur from the Santonian-age Upper Cretaceous Bajo de la Carpa Formation of Rio Negro, Argentina. It was a relatively large, basal alvarezsaurid, and a contemporary of Alvarezsaurus...
- AchillobatorAchillobatorAchillobator is a genus of dromaeosaurid theropod dinosaur from the late Cretaceous Period of what is now Mongolia, about 90 million years ago. It was probably an active bipedal predator, hunting with the large sickle-shaped claw on the second toe of each hind foot...
- "Acracanthus" – original invalid name of AcrocanthosaurusAcrocanthosaurusAcrocanthosaurus is a genus of theropod dinosaur that existed in what is now North America during the Aptian and early Albian stages of the Early Cretaceous. Like most dinosaur genera, Acrocanthosaurus contains only a single species, A. atokensis. Its fossil remains are found mainly in the U.S...
- AcristavusAcristavusAcristavus is a genus of hadrosaurine hadrosaurid dinosaur. Fossils have been found from the Campanian Two Medicine Formation in Montana and Wahweap Formation in Utah. The type species A. gagslarsoni was named in 2011. Unlike nearly all hadrosaurids except Edmontosaurus, Acristavus lacked...
- AcrocanthosaurusAcrocanthosaurusAcrocanthosaurus is a genus of theropod dinosaur that existed in what is now North America during the Aptian and early Albian stages of the Early Cretaceous. Like most dinosaur genera, Acrocanthosaurus contains only a single species, A. atokensis. Its fossil remains are found mainly in the U.S...
- ActiosaurusActiosaurusActiosaurus is an extinct genus of reptile first described by Henri Sauvage in 1883. Little is known of it, and it is considered a nomen dubium. Originally described as a dinosaur, it is now widely considered to be an ichthyosaur. The type species is A. gaudryi .-External links:*....
– probably an ichthyosaurIchthyosaurIchthyosaurs were giant marine reptiles that resembled fish and dolphins... - AdamantisaurusAdamantisaurusAdamantisaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous Period of what is now South America. It is only known from six tail vertebrae but, as a sauropod, it can be assumed that this dinosaur was a very large animal with a long neck and tail...
- AdasaurusAdasaurusAdasaurus is a genus of dromaeosaurid theropod dinosaur from the Late Cretaceous Period of what is now Central Asia. It was a small bipedal carnivore with a sickle-shaped claw on the second toe of each hind foot. An adult was perhaps about long....
Adeopapposaurus
Adeopapposaurus is a genus of prosauropod dinosaur from the Early Jurassic Cañón del Colorado Formation of San Juan, Argentina. It was similar to Massospondylus. Four partial skeletons with two partial skulls are known.The type specimen, PVSJ568, includes a skull and most of a skeleton to just...
Aegyptosaurus
Aegyptosaurus meaning 'Egypt’s lizard', for the country in which it was discovered is a genus of sauropod dinosaur believed to have lived in what is now Africa, around 95 million years ago, during the mid- and late-Cretaceous Period . Like most sauropods, it had a long neck and a small skull...
Aeolosaurus
Aeolosaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous Period of what is now South America. Like most sauropods, it would have been a quadrupedal herbivore with a long neck and tail...
Aepisaurus
Aepisaurus was a genus of sauropod dinosaur from the Albian-age Lower Cretaceous Grès vert of Départment du Vaucluse, France, around 100 million years ago. It is an obscure genus from an unknown family, represented by a single humerus, now lost...
Aerosteon
Aerosteon is a genus of allosauroid theropod dinosaur from the Late Cretaceous period of Argentina. Its remains were discovered in 1996 in the Anacleto Formation, dating to the Santonian stage . The type and only known species is A. riocoloradensis...
Massospondylus
Massospondylus and ) is a genus of prosauropod dinosaur from the early Jurassic Period . It was described by Sir Richard Owen in 1854 from remains found in South Africa, and is thus one of the first dinosaurs to have been named...
Afrovenator
Afrovenator is a genus of megalosaurid theropod dinosaur from the mid Jurassic Period of northern Africa. It was a bipedal predator, with a mouthful of sharp teeth and three claws on each hand...
Agathaumas
Agathaumas is a dubious genus of a large ceratopsid dinosaur that lived in Wyoming during the Late Cretaceous . The name comes from Greek, αγαν - 'much' and θαυμα - 'wonder'...
Crocodilia
Crocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
n
Agilisaurus
Agilisaurus is a genus of ornithischian dinosaur from the Middle Jurassic Period of what is now eastern Asia. The name is derived from the Latin agilis meaning 'agile' and the Greek sauros meaning 'lizard', and refers to the agility suggested by its lightweight skeleton and long legs...
Agnosphitys
Agnosphitys is a disputed genus of dinosaur. It contains only one species, the type species A. cromhallensis. Its remains include an ilium, maxilla, astragalus and humerus, which date variously from the Norian and Rhaetian stages of the Late Triassic...
Agrosaurus
Agrosaurus is the name given to the remains of what was originally believed to be a Triassic prosauropod from Australia. Agrosaurus would thus be the oldest dinosaur from that country. However, this appears to have been an error, and the material actually appears to come from Thecodontosaurus or...
– probably a junior synonym of Thecodontosaurus
Thecodontosaurus
Thecodontosaurus is a genus of herbivorous basal sauropodomorph dinosaur which lived during the late Triassic period ....
Agujaceratops
Agujaceratops is a genus of herbivorous ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now Texas. Originally known as Chasmosaurus mariscalensis and described by Lehman in 1989, it was moved to a new genus by Lucas, Sullivan and...
Agustinia
Agustinia is a genus of sauropod dinosaur from the Early Cretaceous Period of South America. Like all known sauropods, it was quadrupedal and herbivorous. Although some sauropods are known to have body armor, Agustinias armor was unique even among sauropods...
Ahshislepelta
Ahshislepelta is a genus of herbivorousankylosaurine ankylosaurid dinosaur from Late Cretaceous deposits of San Juan Basin, New Mexico....
Airakoraptor
"Airakoraptor" was a genus of theropod dinosaur from the Late Cretaceous Period. It lived in what is now Mongolia and was first described by Perle, Norell & Clark, in 1999. It is considered a nomen nudum because it has not been fully described...
" – nomen nudum
Ajkaceratops
Ajkaceratops is a genus of ceratopsian dinosaur described in 2010. It lived during the Late Cretaceous in what is now Europe, in what was then the western Tethyan archipelago. The type species, A. kozmai, is most closely related to forms in east Asia, from where its ancestors may have migrated by...
Alamosaurus
Alamosaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous Period of what is now North America. It was a large quadrupedal herbivore. Isolated vertebrae and limb bones indicate that it reached sizes comparable to Argentinosaurus and Puertasaurus, which would make it the...
Shaochilong
Shaochilong is a genus of carcharodontosaurid dinosaur from the mid Cretaceous Ulansuhai Formation of China . The type species, S...
Alaskacephale
Alaskacephale was a genus of pachycephalosaurid dinosaur that lived in the late Campanian stage of the Late Cretaceous ....
Albalophosaurus
Albalophosaurus is a genus of cerapod ornithischian dinosaur. It was described in 2009 from remains found in 1997 by Yoshinori Kobayashi from the Kuwajima Formation of central Japan, outcropping in Hakusan in the Ishikawa Prefecture...
Albertaceratops
Albertaceratops was a genus of centrosaurine horned dinosaur from the middle Campanian-age Upper Cretaceous Oldman Formation of Alberta, Canada....
Albertonykus
Albertonykus is a genus of alvarezsaurid dinosaur from lower Maastrichtian-age rocks of the Horseshoe Canyon Formation of Alberta, Canada. It is known from forelimb and hindlimb remains from multiple individuals. All but two of the specimens come from a bonebed dominated by Albertosaurus...
Albertosaurus
Albertosaurus is a genus of tyrannosaurid theropod dinosaur that lived in western North America during the Late Cretaceous Period, more than 70 million years ago. The type species, A. sarcophagus, was apparently restricted in range to the modern-day Canadian province of Alberta, after which...
Albinykus
Albinykus is a genus of alvarezsaurid dinosaur. Fossils have been found from Late Cretaceous-age deposits in the Gobi Desert of Mongolia. The type species A. baatar was named by Sterling J. Nesbitt, Julia A. Clarke, Alan H. Turner and Mark A...
Albisaurus
Albisaurus was once thought to be a genus of dinosaur, but is now thought to be a non-dinosaurian archosaur. It was first described by Antonin Fritsch , a Czech palaeontologist, in 1893, but the remains are sparse...
– a non-dinosaurian reptile
Reptile
Reptiles are members of a class of air-breathing, ectothermic vertebrates which are characterized by laying shelled eggs , and having skin covered in scales and/or scutes. They are tetrapods, either having four limbs or being descended from four-limbed ancestors...
Alectrosaurus
Alectrosaurus is a genus of tyrannosaurid theropod dinosaur from the Late Cretaceous Period of Inner Mongolia. It was a bipedal carnivore with a body shape similar to its much larger relative, Tyrannosaurus rex...
Aletopelta
Aletopelta coombsi was an ankylosaurian ornithischian dinosaur whose fossils were found in Southern California.Etymologically, the generic name is composed of the Greek terms aletes and pelte, meaning, respectively "wandering" and "shield"...
Algoasaurus
Algoasaurus is a genus of sauropod dinosaur from the Tithonian-early Valanginian-age Late Jurassic-Early Cretaceous Upper Kirkwood Formation of Cape Province, South Africa. It was a neosauropod; although it has often been assigned to the Titanosauridae, there is no evidence for this, and recent...
Alioramus
Alioramus is a genus of tyrannosaurid theropod dinosaur from the Late Cretaceous period of Asia. The type A. remotus, is known from a partial skull and three metatarsals recovered from Mongolian sediments which were deposited in a humid floodplain between 70 and 65 million years ago. These...
Eucnemesaurus
Eucnemesaurus is a basal sauropodomorph dinosaur genus usually considered to be a synonym of Euskelosaurus. Recent study by Yates , however, indicates that it is valid and the same animal as putative "giant herrerasaurid" Aliwalia....
- AllosaurusAllosaurusAllosaurus is a genus of large theropod dinosaur that lived 155 to 150 million years ago during the late Jurassic period . The name Allosaurus means "different lizard". It is derived from the Greek /allos and /sauros...
- AlocodonAlocodonAlocodon is a genus of ornithischian dinosaur from the Middle Jurassic of what is now Portugal. It was described in 1973 by Richard Anthony Thulborn. It had small ornithopod-like teeth with vertical grooves...
- AltirhinusAltirhinusAltirhinus is a genus of iguanodontian ornithopod dinosaur from the Early Cretaceous Period of Mongolia.-Description:Altirhinus was herbivorous and bipedal when walking or running, but probably became quadrupedal when feeding from the ground. According to the original description, the entire body...
- AltispinaxAltispinaxAltispinax is a genus of theropod dinosaur from the Early Cretaceous Obernkirchen Sandstein of Niedersachsen, Germany. Material has also been referred to it from the Hastings Beds , Purbeck Beds , and Lower Greensand of England, and the Weald Clay of England and Belgium, but this material...
- AlvarezsaurusAlvarezsaurusAlvarezsaurus is a genus of small alvarezsaurid dinosaur from the Late Cretaceous period of Argentina, approximately 86 - 83 million years ago. Estimates suggest that it measured about 2 meters in length and weighed approximately 20 kg...
- AlwalkeriaAlwalkeriaAlwalkeria is a genus of basal saurischian dinosaur from the Late Triassic of India. It was a small bipedal omnivore.This dinosaur was originally named Walkeria maleriensis by Sankar Chatterjee in 1987, in honor of famous British paleontologist Alick Walker and the Maleri Formation, in which its...
- AlxasaurusAlxasaurusAlxasaurus is a genus of therizinosauroid alxasaurid theropod dinosaur from the Early Cretaceous Period of Inner Mongolia. It is one of the earliest known members of the superfamily Therizinosauroidea, but it already possessed the body shape - including the long neck, short tail, and long hand...
- AmargasaurusAmargasaurusAmargasaurus is a genus of dicraeosaurid sauropod dinosaur from the Early Cretaceous Period of what is now South America. It was small for a sauropod, reaching 10 meters length. It would have been a quadrupedal herbivore with a long, low skull on the end of a long neck, much like its relative...
- AmargatitanisAmargatitanisAmargatitanis is a genus of titanosaur sauropod dinosaur from the Barremian-age La Amarga Formation of Neuquén, Argentina...
- AmazonsaurusAmazonsaurusAmazonsaurus is a genus of diplodocoid sauropod dinosaur from the Early Cretaceous Period of what is now South America. It would have been a large-bodied quadrupedal herbivore with a long neck and whiplash tail...
- AmmosaurusAmmosaurusAmmosaurus is a genus of sauropodomorph dinosaur from the Early and Middle Jurassic Period of North America. At 4 meters in length, it was small compared to some other members of its suborder, which included the largest animals ever to walk the Earth...
- AmpelosaurusAmpelosaurusAmpelosaurus is a titanosaurian sauropod dinosaur hailing from the Late Cretaceous Period of what is now Europe. Like most sauropods, it would have had a long neck and tail but it also carried armor in the form of osteoderms on its back. This dinosaur would have stretched about 15 meters from...
- AmphicoeliasAmphicoeliasAmphicoelias is a genus of herbivorous sauropod dinosaur that includes what may be the largest dinosaur ever discovered, A. fragillimus. Based on surviving descriptions of a single fossil bone, A. fragillimus may have been the longest known vertebrate at in length, and may have had a mass of up...
- "Amphicoelicaudia" – nomen nudum; possibly HuabeisaurusHuabeisaurusHuabeisaurus was a genus of dinosaur from the Late Cretaceous . It was a sauropod which lived in what is present-day northern China. The type species, Huabeisaurus allocotus, was first described by Pang and Cheng in 2000. The dinosaur closely resembles Opisthocoelicaudia, and was a quadrupal...
- "Amphisaurus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as AnchisaurusAnchisaurusAnchisaurus is a genus of basal sauropodomorph, and was an early herbivorous dinosaur. Until recently it was classed as a member of Prosauropoda. The name comes from the Greek αγχι/agkhi... - AmtocephaleAmtocephaleAmtocephale is a genus of pachycephalosaurid dinosaur from early Late Cretaceous deposits of southern Gobi Desert, Mongolia....
- AmtosaurusAmtosaurusAmtosaurus is a genus of ornithischian dinosaur based on a fragmentary skull collected from the Upper Cretaceous Bayanshiree Svita Formation of Mongolia and originally believed to represent an ankylosaurid. Hadrosaurid affinities have also been suggested...
– possibly TalarurusTalarurusTalarurus is a genus of hippopotamus-sized ankylosaurid dinosaur with heavy armour and a club tail. It was named by Evgeny Maleev in 1952.-Age and location:... - AmurosaurusAmurosaurusAmurosaurus is a genus of lambeosaurine hadrosaurid dinosaur found in the latest Cretaceous period of eastern Asia. Like most lambeosaurs, it would have been a primarily bipedal herbivore with a "duckbill" shaped snout and a hollow crest on top of its head, although such a crest has not been found...
- AmygdalodonAmygdalodonAmygdalodon was a genus of herbivorous dinosaur with a long neck. It is a nomen dubium. The dinosaur itself is from the Bajocian stage of the Jurassic, and only a few bone fragments and teeth have been discovered...
- AnabisetiaAnabisetiaAnabisetia is a genus of ornithopod dinosaur from the Late Cretaceous Period of Patagonia, South America. It was a small bipedal herbivore, almost seven feet long....
- AnasazisaurusAnasazisaurusAnasazisaurus is a genus of hadrosaurid ornithopod dinosaur that lived about 74 million years ago, in the Late Cretaceous Period. It was found in the Farmington Member of the Kirtland Formation, in the San Juan Basin of New Mexico, United States. Only a partial skull has been found to date...
- Anatosaurus – junior synonym of EdmontosaurusEdmontosaurusEdmontosaurus is a genus of crestless hadrosaurid dinosaur. It contains two species: Edmontosaurus regalis and Edmontosaurus annectens. Fossils of E. regalis have been found in rocks of western North America that date from the late Campanian stage of the Cretaceous Period 73 million years ago,...
- AnatotitanAnatotitanAnatotitan is a genus of flat-headed or hadrosaurine hadrosaurid ornithopod dinosaur from the very end of the Cretaceous Period, in what is now North America...
- AnchiceratopsAnchiceratopsAnchiceratops is a genus of chasmosaurine ceratopsid dinosaur from the Late Cretaceous Period of western North America. Like other ceratopsids, it was a quadrupedal herbivore with three horns on its face, a parrot-like beak, and a long frill extending from the back of its head. The two horns above...
- AnchiornisAnchiornisAnchiornis is a genus of small, feathered, deinonychosaurian dinosaur. The genus Anchiornis contains the type species Anchiornis huxleyi, named in honor of Thomas Henry Huxley, an early proponent of biological evolution, and the first to propose a close evolutionary relationship between birds and...
- AnchisaurusAnchisaurusAnchisaurus is a genus of basal sauropodomorph, and was an early herbivorous dinosaur. Until recently it was classed as a member of Prosauropoda. The name comes from the Greek αγχι/agkhi...
- AndesaurusAndesaurusAndesaurus is a genus of basal titanosaurian sauropod dinosaur which existed during the middle of the Cretaceous Period in South America. Like most sauropods, it would have had a small head on the end of a long neck and an equally long tail...
- Angaturama – probable junior synonym of IrritatorIrritatorIrritator is a genus of spinosaurid dinosaur that lived in the early Cretaceous Period , around 110 million years ago. Current estimations indicate a length of 8 meters . It was found in Brazil...
- "AngloposeidonAngloposeidon"Angloposeidon" is the informal name given to a dinosaur from the Early Cretaceous of southern England. It was a possible brachiosaurid but has not been formally named. Darren Naish, a notable vertebrate palaeontologist, has worked with the specimen and has recommended that this name only be used...
" – nomen nudum - AngolatitanAngolatitanAngolatitan is a genus of long-necked, plant eating sauropod dinosaur from Angola. It is known from a partial right arm including a shoulder blade, upper arm , the two bones of the lower arm , and three metacarpals...
- AngulomastacatorAngulomastacatorAngulomastacator is a genus of duck-billed dinosaur from the Campanian-age Aguja Formation of Big Bend National Park, Texas...
- AniksosaurusAniksosaurusAniksosaurus was a genus of dinosaur from what is now present-day Chubut Province, Argentina. It was a theropod, specifically a coelurosaur, which lived in the middle Cretaceous period...
- AnimantarxAnimantarxAnimantarx is a genus of nodosaurid ankylosaurian dinosaur from the Upper Cretaceous of western North America. Like other nodosaurs, it would have been a slow-moving quadrupedal herbivore covered in heavy armor scutes, but without a tail club...
- AnkistrodonAnkistrodonAnkistrodon is an extinct genus of archosaur first thought to be a dinosaur. It was later determined to be a proterosuchid archosauriform. The type species is A. indicus, described by prolific British zoologist Thomas Henry Huxley in 1865. One authority in the 1970s classified Ankistrodon as a...
– actually a proterosuchid archosauriform - AnkylosaurusAnkylosaurusAnkylosaurus is a genus of ankylosaurid dinosaur, containing one species, A. magniventris...
- Anodontosaurus – junior synonym of EuoplocephalusEuoplocephalusEuoplocephalus was one of the largest genera of ankylosaurian dinosaurs, at about the size of a small elephant. It is also the ankylosaurian with the best fossil record, so its extensive spiked armor, low-slung body and great club-like tail are well documented.-Description:Among the...
or DyoplosaurusDyoplosaurusDyoplosaurus is the name given to a genus of ankylosaurid dinosaur. It lived during the Late Cretaceous near what is now the Red Deer River in Alberta, Canada and was named by William Parks in 1924, based on holotype ROM 784, a partial skeleton including parts of the skull and lower jaws.The type... - AnoplosaurusAnoplosaurusAnoplosaurus is an extinct genus of nodosaurid dinosaur, from the late Albian-age Lower Cretaceous Cambridge Greensand of Cambridgeshire, England...
- AnserimimusAnserimimusAnserimimus is a genus of ornithomimid theropod dinosaur, from the Late Cretaceous Period of what is now Mongolia. It was a lanky, fast-running animal, possibly an omnivore...
- AntarctopeltaAntarctopeltaAntarctopelta was a genus of ankylosaurian dinosaur with one known species, A. oliveroi, which lived in Antarctica during the Late Cretaceous Period. It was a medium-sized ankylosaur, reaching no more than 4 meters in length, and showed characteristics of two different families, making more...
- AntarctosaurusAntarctosaurusAntarctosaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous Period of what is now South America. The type species, A. wichmannianus, was described by prolific German paleontologist Friedrich von Huene in 1929, who also described a second species in 1929. Three additional...
- AntetonitrusAntetonitrusAntetonitrus is the oldest known genus of sauropod dinosaur, living during the Late Triassic Period of southern Africa. It was a quadrupedal herbivore, like many of its later relatives, although it was far smaller than some of them...
- Anthodon – actually a pareiasaurPareiasaurThe Pareiasaurs - Family Pareiasauridae - are a clade of medium-sized to large herbivorous anapsid reptiles that flourished during the Permian period....
- AntrodemusAntrodemusAntrodemus is a dubious genus of theropod dinosaur from the Kimmeridgian-Tithonian-age Upper Jurassic Morrison Formation of Middle Park, Colorado...
– possibly a junior synonym of AllosaurusAllosaurusAllosaurus is a genus of large theropod dinosaur that lived 155 to 150 million years ago during the late Jurassic period . The name Allosaurus means "different lizard". It is derived from the Greek /allos and /sauros... - ApatodonApatodonApatodon is a dubious genus of dinosaur, possibly synonymous with Allosaurus.When Marsh named it, he thought it was a jaw with a tooth from a Mesozoic pig, but it was soon shown that the specimen was an eroded vertebra, from a dinosaur possibly from the Morrison Formation of the Rocky Mountain region...
– possibly a junior synonym of AllosaurusAllosaurusAllosaurus is a genus of large theropod dinosaur that lived 155 to 150 million years ago during the late Jurassic period . The name Allosaurus means "different lizard". It is derived from the Greek /allos and /sauros... - ApatosaurusApatosaurusApatosaurus , also known by the popular but scientifically deprecated synonym Brontosaurus, is a genus of sauropod dinosaur that lived from about 154 to 150 million years ago, during the Jurassic Period . It was one of the largest land animals that ever existed, with an average length of and a...
– popularly known as BrontosaurusApatosaurusApatosaurus , also known by the popular but scientifically deprecated synonym Brontosaurus, is a genus of sauropod dinosaur that lived from about 154 to 150 million years ago, during the Jurassic Period . It was one of the largest land animals that ever existed, with an average length of and a... - AppalachiosaurusAppalachiosaurusAppalachiosaurus is a genus of tyrannosauroid theropod dinosaur from the Late Cretaceous Period of eastern North America. Like almost all theropods, it was a bipedal predator. Only a juvenile skeleton has been found, representing an animal over 7 meters long and weighing over...
- AragosaurusAragosaurusAragosaurus was a genus of sauropod dinosaur from the Early Cretaceous period of Galve, province of Teruel, in the autonomous territory of Aragón, Spain....
- AralosaurusAralosaurusAralosaurus meaning "Aral Sea lizard", because it was found in the Aral Sea was a genus of hadrosaurid dinosaur which lived during the Late Cretaceous of what is now Kazakhstan...
- "Araucanoraptor" – nomen nudum; NeuquenraptorNeuquenraptorNeuquenraptor is a dromaeosaurid theropod dinosaur of the Late Cretaceous of Argentina, one of the first dromaeosaurids found in the Southern Hemisphere....
- ArchaeoceratopsArchaeoceratopsArchaeoceratops, meaning "ancient horned face", is a genus of basal neoceratopsian dinosaur from the Early Cretaceous of north central China. It appears to have been bipedal and quite small with a comparatively large head...
- ArchaeodontosaurusArchaeodontosaurusArchaeodontosaurus is a genus of sauropod dinosaur from the Middle Jurassic. Its fossils were found in Madagascar. The type species, Archaeodontosaurus descouensi, was described in September 2005. The specific name honours the collector, Didier Descouens...
- ArchaeopteryxArchaeopteryxArchaeopteryx , sometimes referred to by its German name Urvogel , is a genus of theropod dinosaur that is closely related to birds. The name derives from the Ancient Greek meaning "ancient", and , meaning "feather" or "wing"...
- "ArchaeoraptorArchaeoraptor"Archaeoraptor" is the generic name informally assigned in 1999 to a fossil from China in an article published in National Geographic magazine. The magazine claimed that the fossil was a "missing link" between birds and terrestrial theropod dinosaurs. Even prior to this publication there had been...
" – now known as the birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
YanornisYanornisYanornis is an extinct genus of omnivorous Early Cretaceous birds, thought to be closely related to the common ancestor of all modern birds. One species, Yanornis martini,...
and the dromaeosaur MicroraptorMicroraptorMicroraptor is a genus of small, four-winged dromaeosaurid dinosaurs. Numerous well-preserved fossil specimens have been recovered from Liaoning, China... - Archaeornis – junior synonym of the birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
ArchaeopteryxArchaeopteryxArchaeopteryx , sometimes referred to by its German name Urvogel , is a genus of theropod dinosaur that is closely related to birds. The name derives from the Ancient Greek meaning "ancient", and , meaning "feather" or "wing"... - ArchaeornithoidesArchaeornithoidesArchaeornithoides is a genus of maniraptoriform theropod dinosaur. It was found in Late Cretaceous river sandstones of the Djadokhta Formation beds located in Bayn Dzak, Mongolia...
- ArchaeornithomimusArchaeornithomimusArchaeornithomimus is a genus of ornithomimosaurian theropod dinosaur from the Late Cretaceous of China, 70 million years ago....
- Archaeovolans – junior synonym of the birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
YanornisYanornisYanornis is an extinct genus of omnivorous Early Cretaceous birds, thought to be closely related to the common ancestor of all modern birds. One species, Yanornis martini,... - ArctosaurusArctosaurusArctosaurus is a genus of extinct reptile originally classified as a small reptile of unknown affinities, but was often classified as a sauropodomorph dinosaur in the years to follow...
– actually some sort of non-dinosaurian reptileReptileReptiles are members of a class of air-breathing, ectothermic vertebrates which are characterized by laying shelled eggs , and having skin covered in scales and/or scutes. They are tetrapods, either having four limbs or being descended from four-limbed ancestors... - ArcusaurusArcusaurusArcusaurus is an extinct genus of sauropodomorph dinosaur from the Early Jurassic of South Africa.Arcusaurus was first named by Adam Yates, Matthew Bonnan and Johann Neveling in 2011 and the type species is Arcusaurus pereirabdalorum. The generic name is derived from Latin arcus, "rainbow", a...
- ArenysaurusArenysaurusArenysaurus is a genus of hadrosaurid dinosaur from the Late Cretaceous. It is known from a partial skull and skeleton found in late Maastrichtian-age rocks of the Pyrenees Mountains in Spain. The type species is A. ardevoli, described in 2009 by Pereda-Suberbiola et al., a group of researchers...
- ArgentinosaurusArgentinosaurusArgentinosaurus is a genus of titanosaur sauropod dinosaur first discovered by Guillermo Heredia in Argentina. The generic name refers to the country in which it was discovered...
- ArgyrosaurusArgyrosaurusArgyrosaurus is a genus of herbivorous titanosaurid dinosaur that lived about 90 million years ago, during the Late Cretaceous Period of what is now South America . It was one of the largest dinosaurs, having a length of up to 20–30 metres and a weight estimated as high as eighty tonnes...
- Aristosaurus – junior synonym of MassospondylusMassospondylusMassospondylus and ) is a genus of prosauropod dinosaur from the early Jurassic Period . It was described by Sir Richard Owen in 1854 from remains found in South Africa, and is thus one of the first dinosaurs to have been named...
- AristosuchusAristosuchusAristosuchus was a small coelurosaurian dinosaur, whose name was derived from the Greek ἄριστος and σουχος, the Ancient Greek corruption of the name of the Egyptian crocodile-headed god Sobek. It shared many characteristics with birds.Aristosuchus was a bipedal, meat-eating theropod dinosaur...
- ArizonasaurusArizonasaurusArizonasaurus was a ctenosauriscid archosaur from the Middle Triassic . Arizonasaurus is found in the Middle Triassic Moenkopi Formation of northern Arizona. A fairly complete skeleton was found in 2002 by Sterling Nesbitt. The taxon has a large sailback formed by elongate neural spines of the...
– actually a rauisuchiaRauisuchiaRauisuchia is a group of predatory and mostly large Triassic archosaurs. As a clade, Rauisuchia includes these Triassic forms and all crocodylomorphs, which are descendants of Triassic rauisuchians. The group in its traditional sense is paraphyletic, because it does not include crocodylomorph...
n - "Arkanosaurus" – variant spelling of "ArkansaurusArkansaurus"Arkansaurus fridayi" is the informal name of a dinosaur that was discovered in Lockesburg, Arkansas. "Arkansaurus fridayi" was a bipedal coelurosaurian dinosaur, a group of theropods that includes the Tyrannosauridae, Ornithomimidae, and Maniraptora. Its nearest relative was thought to be...
" - "ArkansaurusArkansaurus"Arkansaurus fridayi" is the informal name of a dinosaur that was discovered in Lockesburg, Arkansas. "Arkansaurus fridayi" was a bipedal coelurosaurian dinosaur, a group of theropods that includes the Tyrannosauridae, Ornithomimidae, and Maniraptora. Its nearest relative was thought to be...
" – nomen nudum - ArkharaviaArkharaviaArkharavia is a genus of hadrosaurid dinosaur. It lived in what is now Russia, during the Late Cretaceous. It was described in 2010 by Alifanov and Bolotsky. The type species is A. heterocoelica.-Known material:...
- ArrhinoceratopsArrhinoceratopsArrhinoceratops is a genus of ceratopsian dinosaur. The name was coined as its original describer concluded it had no nose-horn, however further analysis revealed this not to be the case...
- ArstanosaurusArstanosaurusArstanosaurus was a genus of hadrosaurid dinosaur from the Santonian-Campanian-age Upper Cretaceous Bostobinskaya Formation, Kazakhstan. It has had a confusing history, being considered both a hadrosaurid and a ceratopsid, or both at the same time .-History:The genus was based on a maxilla , with...
- AsiaceratopsAsiaceratopsAsiaceratops was a genus of ceratopsian dinosaur. It lived during the Late Cretaceous. Its fossils have been found in China, Mongolia, and Uzbekistan. The type species, A. salsopaludalis, was formally described by Nesov and Kaznyshkina in 1989. A second species, A...
- AsiamericanaAsiamericanaAsiamericana Asiamericana Asiamericana (AY-zha-MER-i-KAHN-a - (Greek: Asia meaning Asia and New Latin America meaning America) was a genus of theropod dinosaur which was named to recognize the occurrence of similar fossil teeth in Central Asia and North America. These regions once formed a...
- AsiatosaurusAsiatosaurusAsiatosaurus was a genus of herbivorous sauropod dinosaur which lived during the early Cretaceous. Its fossils have been found in China and Mongolia. It is known only from teeth, making it difficult to rely on information until more specimens are found to expand our knowledge.The type species, A....
- AstrodonAstrodonAstrodon was a genus of large herbivorous sauropod dinosaur, related to Brachiosaurus, that lived in what is now the eastern United States during the Early Cretaceous period. Its fossils have been found in the Arundel Formation, which has been dated through palynomorphs to the Aptian-Albian...
- AstrodonAstrodonAstrodon was a genus of large herbivorous sauropod dinosaur, related to Brachiosaurus, that lived in what is now the eastern United States during the Early Cretaceous period. Its fossils have been found in the Arundel Formation, which has been dated through palynomorphs to the Aptian-Albian...
ius – junior synonym of AstrodonAstrodonAstrodon was a genus of large herbivorous sauropod dinosaur, related to Brachiosaurus, that lived in what is now the eastern United States during the Early Cretaceous period. Its fossils have been found in the Arundel Formation, which has been dated through palynomorphs to the Aptian-Albian... - AstrodonAstrodonAstrodon was a genus of large herbivorous sauropod dinosaur, related to Brachiosaurus, that lived in what is now the eastern United States during the Early Cretaceous period. Its fossils have been found in the Arundel Formation, which has been dated through palynomorphs to the Aptian-Albian...
taurus – junior synonym of AstrodonAstrodonAstrodon was a genus of large herbivorous sauropod dinosaur, related to Brachiosaurus, that lived in what is now the eastern United States during the Early Cretaceous period. Its fossils have been found in the Arundel Formation, which has been dated through palynomorphs to the Aptian-Albian... - AsylosaurusAsylosaurusAsylosaurus is a genus of basal sauropodomorph dinosaur from the Late Triassic of England. It is based on partial remains, described in 1836 by Henry Riley and Samuel Stutchbury as pertaining to Thecodontosaurus, that Othniel Charles Marsh brought to Yale University between 1888 and 1890...
- AtacamatitanAtacamatitanAtacamatitan is a genus of sauropod dinosaur. It is a titanosaur which lived during the late Cretaceous in what is now northern Chile. It is known from the holotype SGO-PV-961, which includes two dorsal vertebrae, caudal vertebrae, ribs, a possible sternum, part of an upper arm, the right femur,...
- AtlantosaurusAtlantosaurusAtlantosaurus is a dubious genus of sauropod dinosaur. The type specimen, found by Arthur Lakes in the Morrison Formation of Colorado, USA, was described by Othniel Charles Marsh, a Professor of Paleontology at Yale University , in 1877 as "Titanosaurus" montanus...
– possible junior synonym of ApatosaurusApatosaurusApatosaurus , also known by the popular but scientifically deprecated synonym Brontosaurus, is a genus of sauropod dinosaur that lived from about 154 to 150 million years ago, during the Jurassic Period . It was one of the largest land animals that ever existed, with an average length of and a...
or CamarasaurusCamarasaurusCamarasaurus meaning 'chambered lizard', referring to the hollow chambers in its vertebrae was a genus of quadrupedal, herbivorous dinosaurs. It was the most common of the giant sauropods to be found in North America... - AtlasaurusAtlasaurusAtlasaurus was a moderately large genus of sauropod dinosaur from Middle Jurassic beds in North Africa.-Discovery and species:Atlasaurus was discovered by Monbaron, Russell & Taquet in 1999...
- AtlascopcosaurusAtlascopcosaurusAtlascopcosaurus is a genus of herbivorous basal euornithopod dinosaur from the Early Cretaceous of the present Australia....
- AtrociraptorAtrociraptorAtrociraptor is a genus of dromaeosaurid theropod dinosaur from the Late Cretaceous of Alberta, Canada....
- AtsinganosaurusAtsinganosaurusAtsinganosaurus is a genus of titanosaurian dinosaur which existed in what is now France during the late Cretaceous period. Well-preserved remains of Atsinganosaurus were collected from the Grès à Reptiles Formation of the Aix-en-Provence Basin...
- AublysodonAublysodonAublysodon is a name given to a large number of carnivorous dinosaur teeth of a certain form found in numerous late Cretaceous period geological formations...
- AucasaurusAucasaurusAucasaurus was a genus of medium-sized theropod dinosaur from Argentina that lived during the Santonian stage . It was smaller than the related Carnotaurus, although more derived in some ways, such as its extremely reduced arms and almost total lack of fingers.The type skeleton is complete to the...
- "Augustia" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as AgustiniaAgustiniaAgustinia is a genus of sauropod dinosaur from the Early Cretaceous Period of South America. Like all known sauropods, it was quadrupedal and herbivorous. Although some sauropods are known to have body armor, Agustinias armor was unique even among sauropods... - AuroraceratopsAuroraceratopsAuroraceratops, meaning "dawn horned face", is a genus of basal neoceratopsian dinosaur, from the Early Cretaceous of north central China...
- AustralodocusAustralodocusAustralodocus, meaning "southern beam" from the Latin australis "southern" and the Greek dokos/δοκоς "beam", is a sauropod dinosaur that lived during the Late Jurassic period, around 150 million years ago in what was then German East Africa...
- AustralovenatorAustralovenatorAustralovenator is a genus of allosauroid theropod dinosaur from late Albian -age rocks of Australia...
- AustrocheirusAustrocheirusAustrocheirus is an extinct genus of neoceratosaurian theropod dinosaur which existed during the late Cretaceous period. It was named and described by Martín Ezcurra, Federico Agnolin and Fernando Novas in 2010. It contains the type species Austrocheirus isasii. The generic name means "southern hand"...
- AustroraptorAustroraptorAustroraptor was a genus of dromaeosaurid dinosaur that lived about 70 million years ago during the Cretaceous period in what is now modern Argentina. The type species for the genus, Austroraptor cabazai, was described in late 2008 by Fernando Novas of the Museo Argentino de Ciencias Naturales...
- AustrosaurusAustrosaurusAustrosaurus was a sauropod dinosaur from the Allaru Mudstone, from the early Cretaceous of Central-Western Queensland in Australia.-Discovery and species:...
- AvaceratopsAvaceratopsAvaceratops is a genus of small ceratopsian dinosaur which lived during the late Campanian during the Late Cretaceous Period in what are now the Northwest United States.-Discoveries and species:...
- "Avalonia" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as AvalonianusAvalonianusAvalonianus is a name used for fossil teeth from the Late Triassic of England. It was first described in 1898 by Seeley with the name Avalonia, but that name was preoccupied , so Kuhn renamed it in 1961... - AvalonianusAvalonianusAvalonianus is a name used for fossil teeth from the Late Triassic of England. It was first described in 1898 by Seeley with the name Avalonia, but that name was preoccupied , so Kuhn renamed it in 1961...
– actually a non-dinosaurian archosaurArchosaurArchosaurs are a group of diapsid amniotes whose living representatives consist of modern birds and crocodilians. This group also includes all extinct non-avian dinosaurs, many extinct crocodilian relatives, and pterosaurs. Archosauria, the archosaur clade, is a crown group that includes the most... - AviatyrannisAviatyrannisAviatyrannis is a genus of tyrannosauroid dinosaur from the Kimmeridgian stage of the Late Jurassic found in Portugal. It was described by Oliver Rauhut in 2003. The name means "Jurassic grandmother tyrant"...
- AvimimusAvimimusAvimimus , meaning "bird mimic" , was a genus of bird-like maniraptoran dinosaur that lived in the late Cretaceous in what is now Mongolia, around 70 million years ago.-Description:...
- AvipesAvipesAvipes may have been a theropod dinosaur, which lived during the Middle Triassic. Its fossils were found in Bedheim, Südthüringen, Germany, in Lettenkohlensandstein deposits and it was named in 1932 by von Huene...
– probably a non-dinosaurian dinosauromorph - AvisaurusAvisaurusAvisaurus is a genus of enantiornithine bird from the Late Cretaceous of North America.Two species are known; the type species A. archibaldi and A. gloriae...
– actually an enantiornithine birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from... - AzendohsaurusAzendohsaurusAzendohsaurus was a genus of herbivorous archosauromorph from the Late Triassic Period of Morocco. The type species is known only from a partial jaw fragment from Morocco. Azendohsaurus was previously regarded as a dinosaur, as either an ornithischian or a prosauropod...
– a non-dinosaurian archosauromorph
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- BactrosaurusBactrosaurusBactrosaurus is a genus of herbivorous dinosaur that lived in east China during the late Cretaceous, about 70 mya. The position Bactrosaurus occupies in the Cretaceous makes it one of the earliest known hadrosaurs, and although it is not known from a full skeleton, Bactrosaurus is one of the best...
- BagaceratopsBagaceratopsBagaceratops, meaning "small-horned face" , is a genus of ceratopsian dinosaur that lived in what is now Mongolia around 80 million years ago, during the Late Cretaceous...
- BagaraatanBagaraatanBagaraatan was a genus of theropod dinosaur from the Late Cretaceous period. Its fossils were found in the Nemegt Formation of Mongolia. Bagaraatan may have been around 3–4 metres in length....
- BahariasaurusBahariasaurusBahariasaurus is a genus of large theropod dinosaur found in the Bahariya Formation in El-Waha el-Bahariya or Bahariya oasis in Egypt and Kem Kem Beds of North Africa, which date to the late Cretaceous Period, , about 95 million years ago...
- BainoceratopsBainoceratopsBainoceratops was a genus of dinosaur from the late Campanian in the Late Cretaceous. It was a ceratopsian first described by Tereschenko and Alifanov in 2003...
- "BakesaurusBakesaurus"Bakesaurus" was an ornithopod dinosaur from the Late Cretaceous of China. It is mentioned and pictured in the Chinese book The Dinosaur Egg Fossils in Nanyang, China by Zhou S. . There is still uncertainty in the scientific community as to whether or not "Bakesaurus" exists as a valid scientific...
" – nomen nudum - BalaurBalaur (dinosaur)Balaur is a uniquely specialized species of carnivorous dinosaur. It lived in what is now Romania during the latter part of the Late Cretaceous. Balaur was described by scientists in August 2010, and was named after the balaur, a dragon of Romanian folklore. It is known from a single partial...
- BalochisaurusBalochisaurusBalochisaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous of Pakistan. The type species is B. malkani. The discovery was made near Vitariki by a team of paleontologists from the Geological Survey of Pakistan. Formally described in 2006 by M.S...
- BambiraptorBambiraptorBambiraptor is a Late Cretaceous, 75 million year old, bird-like dromaeosaurid theropod dinosaur described by scientists at the University of Kansas, Yale University, and the University of New Orleans....
- BanjiBanjiBanji is a genus of oviraptorid dinosaur. It contains one species, Banji long, named from the Chinese for "striped crest dragon". The species is represented by a single skull and lower jaw. The specimen was donated to the Chinese Institute of Vertebrate Paleontology and Paleoanthropology by an...
- BaotianmansaurusBaotianmansaurusBaotianmansaurus is a genus of titanosauriform sauropod dinosaur. Its fossils have been found in Upper Cretaceous rocks in Henan, China. The type species is B. henanensis, described in 2009.-External links:*...
- BarapasaurusBarapasaurusBarapasaurus is a genus of sauropod dinosaur from Early Jurassic rocks of India. The specific name for its only species, B. tagorei, means 'Tagore's', which honors Bengali poet, writer, painter, and musician Rabindranath Tagore.-Description:...
- BariliumBariliumBarilium is a genus of iguanodontian dinosaur which was first described as a species of Iguanodon by Richard Lydekker in 1888, the specific epithet honouring the discoverer Charles Dawson....
- BarosaurusBarosaurusBarosaurus ; Greek barys/βαρυς meaning 'heavy' and saurus/σαυρος meaning 'lizard', 'heavy lizard') was a giant, long-tailed, long-necked, plant-eating dinosaur closely related to the more familiar Diplodocus...
- BarrosasaurusBarrosasaurusBarrosasaurus is a genus of titanosaurian sauropod dinosaur, first described by Leonardo Salgado and Rodolfo Coria in 2009. The fossils, consisting of three fossil dorsal vertebrae, are well-preserved but incomplete. They were discovered in the Anacleto Formation of the Neuquén province of western...
- BarsboldiaBarsboldiaBarsboldia was a genus of large hadrosaurid dinosaur from the early Maastrichtian Nemegt Formation of Ömnogöv', Mongolia. It is known from a partial vertebral column, partial pelvis, and some ribs...
- BaryonyxBaryonyxBaryonyx is a genus of carnivorous saurischian dinosaur first discovered in clay pits just south of Dorking, England, and later reported from fossils found in northern Spain and Portugal. It is known to contain only one species, Baryonyx walkeri...
- "BashunosaurusDatousaurusDatousaurus, meaning either "Chieftain lizard" or "Big-head Lizard" was a dinosaur from the Middle Jurassic. It was a sauropod collected from the Lower Shaximiao Formation in Dashanpu, Zigong Sichuan province, China...
" – nomen nudum - BasutodonBasutodonBasutodon was a genus of rauisuchian archosaur from the late Carnian-early Norian-age Upper Triassic Lower Elliot Formation of Lesotho. It is based on teeth that were once confused with prosauropod remains, as with Teratosaurus. Because of this, it is sometimes listed in older dinosaur books as an...
– actually a non-dinosaurian archosaurArchosaurArchosaurs are a group of diapsid amniotes whose living representatives consist of modern birds and crocodilians. This group also includes all extinct non-avian dinosaurs, many extinct crocodilian relatives, and pterosaurs. Archosauria, the archosaur clade, is a crown group that includes the most... - BathygnathusBathygnathusBathygnathus was a pelycosaur-grade synapsid, a non-dinosaurian amniote which lived during the Permian Period . The only specimen of Bathygnathus was discovered on Prince Edward Island during the course of a well excavation, in Spring Brook in the New London area and its significance recognized by...
– actually a pelycosaurPelycosaurThe pelycosaurs are an informal grouping composed of basal or primitive Late Paleozoic synapsid amniotes. Some species were quite large and could grow up to 3 meters or more, although most species were much smaller... - BaurutitanBaurutitanBaurutitan was a genus of sauropod dinosaur that appeared in the Late Cretaceous Period. This plant eater grew up to 79 feet long. It was a titanosaur which lived in what is now present-day Brazil....
- "BayosaurusBayosaurus"Bayosaurus" is the informal name given to an as yet undescribed genus of dinosaur. The name was coined by paleontologists Rodolfo Coria, Philip J. Currie, and Paulina Carabajal in 2006. "Bayosaurus" appears on several on-line lists of dinosaurs...
" – nomen nudum - BecklespinaxBecklespinaxBecklespinax is a genus of large theropod dinosaur based on a type specimen of three tall-spined vertebrae found in 1884 in Sussex, England by the fossil collector Samuel H. Beckles. The fossils are believed to have been from the Early Cretaceous....
- "BeelemodonBeelemodon"Beelemodon" is the informal name given to a genus of undescribed dinosaur from the Late Jurassic. It was possibly a coelurosaur. The fossils of "Beelemodon" consist of one partial skeleton, which was found in the U.S. state of Colorado. The name first appeared in print in 1997, when paleontologist...
" – nomen nudum - BeipiaosaurusBeipiaosaurusBeipiaosaurus is a genus of therizinosauroid theropod dinosaur from the Early Cretaceous of China.The exact classification of therizinosaurs had in the past been hotly debated, since their prosauropod-like teeth and body structure indicate that they were generally herbivorous, unlike typical...
- BeishanlongBeishanlongBeishanlong is a genus of giant ornithomimosaurian theropod dinosaur from the Early Cretaceous of China.-Discovery and naming:Three fossils of Beishanlong were in the early twenty-first century found in northwestern China at the White Ghost Castle site, in the province of Gansu...
- BellusaurusBellusaurusBellusaurus was a small short-necked sauropod dinosaur from the Middle Jurassic which measured about long...
- BelodonBelodonBelodon is a genus of phytosaur, a crocodile-like reptile that lived during the Triassic. Its fossils have been found in Europe and elsewhere...
– actually a phytosaurPhytosaurPhytosaurs are an extinct group of large semi-aquatic Late Triassic archosaurs. Phytosaurs belong to the family Phytosauridae and the order Phytosauria. They were long-snouted and heavily armoured, bearing a remarkable resemblance to modern crocodiles in size, appearance, and lifestyle, an example... - BerberosaurusBerberosaurusBerberosaurus is a genus of abelisauroid theropod dinosaur from the Pliensbachian-Toarcian-age Lower Jurassic Toundoute Continental Series found in the High Atlas of Toundoute, Ouarzazate, Morocco. The type species of the genus Berberosaurus is B. liassicus, in reference to the Lias epoch...
- BetasuchusBetasuchusBetasuchus was a theropod dinosaur which lived during the Late Cretaceous Period.Its fossil, holotype BMNH 42997 , a part of a right femur, 312 mm long, was found in The Netherlands near Maastricht, and originally described as a new species of Megalosaurus in 1883 by Harry Seeley: M...
- BienosaurusBienosaurusBienosaurus was a dinosaur from the Early Jurassic. The genus was an armoured dinosaur from the Lower Lufeng Formation in Yunnan Province in China.-Discovery and species:...
- BihariosaurusBihariosaurusBihariosaurus was a genus of camptosaurid dinosaur from Late Cretaceous Romania. The type species, Bihariosaurus bauxiticus, was described by Marinescu in 1989. It was similar to Camptosaurus, and was an iguanodont....
- "Bilbeyhallorum" – nomen nudum; CedarpeltaCedarpeltaCedarpelta is an extinct genus of basal ankylosaurid ankylosaur, based on material recovered from the Lower Cretaceous of North America. The skull lacks extensive cranial ornamentation, a trait which has been interpreted as plesiomorphic for ankylosaurs....
- BissektipeltaBissektipeltaBissektipelta is an ankylosaurid dinosaur from the Upper Cretaceous of Uzbekistan. The holotype and only known specimen was collected from the Bissekty Formation , of Dzharakuduk, and the name Bissektipelta refers to this geological formation...
- BistahieversorBistahieversorBistahieversor is a genus of tyrannosauroid dinosaur. Bistahieversor existed around 75 million years ago during the Late Cretaceous....
- "Blancocerosaurus" – nomen nudum, probably BrachiosaurusBrachiosaurusBrachiosaurus is a genus of sauropod dinosaur from the Jurassic Morrison Formation of North America. It was first described by Elmer S. Riggs in 1903 from fossils found in the Grand River Canyon of western Colorado, in the United States. Riggs named the dinosaur Brachiosaurus altithorax,...
or Giraffatitan - BlasisaurusBlasisaurusBlasisaurus is a genus of lambeosaurine hadrosaurid dinosaur from the Late Cretaceous. It is known from a partial skull and skeleton found in late Maastrichtian-age rocks of Spain. The type species is Blasisaurus canudoi, described in 2010 by Penélope Cruzado-Caballero, Xabier Pereda-Suberbiola...
- BlikanasaurusBlikanasaurusBlikanasaurus was a genus of sauropodomorph dinosaur found in Lower Elliot Formation rocks from the Late Triassic in what is now South Africa's Cape Province. Known from a left lower limb only, it has been variously classified as a prosauropod or basal sauropod...
- BolongBolongBolong is a genus of iguanodontoid dinosaur known from the Early Cretaceous-age Yixian Formation of western Liaoning Province, China. It was named by Wu Wen-hao, Pascal Godefroit and Hu Dong-yu in 2010 and the type species is Bolong yixianensis....
- BonatitanBonatitanBonatitan is a genus of titanosaurian dinosaur from Argentina. It lived during the Late Cretaceous. The type species is Bonatitan reigi, first described by Martinelli and Forasiepi in 2004. The specific epithet honours Osvaldo Reig...
- BonitasauraBonitasauraBonitasaura is a titanosaurian dinosaur hailing from uppermost layers of the Late Cretaceous Bajo de la Carpa Formation, Neuquen Group, located in Río Negro Province, Northwestern Patagonia, Argentina...
- BorealosaurusBorealosaurusBorealosaurus was a dinosaur genus from northern China. It was a herbivorous quadrupedal sauropod from the Early Cretaceous Period. The type species was Borealosaurus wimani...
- BorogoviaBorogoviaBorogovia was a theropod dinosaur genus which lived during the Late Cretaceous Period, in what is now Mongolia. The agile carnivorous troodontid takes its name from creatures known as 'borogoves' in the Lewis Carroll poem, Jabberwocky....
- BothriospondylusBothriospondylusBothriospondylus is an dubious genus of sauropod dinosaur. It lived during the Late Jurassic.The type species, Bothriospondylus suffossus, was described by Richard Owen in 1875. The specific epithet suffossus means "undermined" in Latin, a reference to the fact that pleurocoels had hollowed out...
- BrachiosaurusBrachiosaurusBrachiosaurus is a genus of sauropod dinosaur from the Jurassic Morrison Formation of North America. It was first described by Elmer S. Riggs in 1903 from fossils found in the Grand River Canyon of western Colorado, in the United States. Riggs named the dinosaur Brachiosaurus altithorax,...
- BrachyceratopsBrachyceratopsBrachyceratops is a dubious genus of ceratopsian dinosaur known only from partial juvenile specimens dating to the late Cretaceous Period of Montana, United States....
- BrachylophosaurusBrachylophosaurusBrachylophosaurus was a mid-sized member of the hadrosaurid family of dinosaurs. It is known from several skeletons and bonebed material from the Judith River Formation of Montana and the Oldman Formation of Alberta, living about 76.5 million years ago....
- BrachypodosaurusBrachypodosaurusBrachypodosaurus was a genus of thyreophoran dinosaur from the Late Cretaceous Lameta formation in India...
- Brachyrophus – junior synonym of CamptosaurusCamptosaurusCamptosaurus is a genus of plant-eating, beaked ornithischian dinosaurs of the Late Jurassic period of western North America. The name means 'flexible lizard', ....
- Brachytaenius – actually some sort of non-dinosaurian reptileReptileReptiles are members of a class of air-breathing, ectothermic vertebrates which are characterized by laying shelled eggs , and having skin covered in scales and/or scutes. They are tetrapods, either having four limbs or being descended from four-limbed ancestors...
, possibly the same as DakosaurusDakosaurusDakosaurus is an extinct genus within the family Metriorhynchidae that lived during the Late Jurassic and Early Cretaceous. It was large, with teeth that were serrated and compressed lateromedially . The genus was established by Friedrich August von Quenstedt in 1856 for an isolated tooth named... - BrachytrachelopanBrachytrachelopanBrachytrachelopan is an unusual short-necked sauropod dinosaur from the latest Jurassic Period of Argentina. The holotype and only known specimen was collected from an erosional exposure of fluvial sandstone within the Cañadón Cálcero Formation on a hill approximately 25 km north-northeast...
- BradycnemeBradycnemeBradycneme is a genus of theropod dinosaur from the early Maastrichtian-age Upper Cretaceous Sânpetru Formation of the Haţeg Basin, Transylvania, Romania. It is known only from a partial right lower leg , which its describers believed came from a giant owl.-History:Harrison and Walker described...
- BrasileosaurusBrasileosaurusBrasileosaurus is the name of a sparse collection of fossils that are nomen vanum-- that is, they will probably never be identified. They are believed to be the fossils of a non-dinosaurian archosaur. The type species is B...
– actually a non-dinosaurian archosaurArchosaurArchosaurs are a group of diapsid amniotes whose living representatives consist of modern birds and crocodilians. This group also includes all extinct non-avian dinosaurs, many extinct crocodilian relatives, and pterosaurs. Archosauria, the archosaur clade, is a crown group that includes the most... - BreviceratopsBreviceratopsBreviceratops was a ceratopsian dinosaur from Late Cretaceous Mongolia. It was related to Protoceratops. The fossils originally described by Maryanska and Osmolska in 1975 and placed in Protoceratops, were moved to the new genus by Kurzanov in 1990.The type species is Breviceratops...
- BrohisaurusBrohisaurusBrohisaurus is a genus of sauropod dinosaur from the Late Jurassic, based on limb fossils. The fossils were discovered in the Kirthar foldbelt in Pakistan. The type species is B. kirthari, described by M.S. Malkani in 2003.-External links:...
- BrontomerusBrontomerusBrontomerus is a genus of camarasauromorph sauropod which lived during the early Cretaceous . It was named in 2011 and the type species is Brontomerus mcintoshi...
- "BrontoraptorBrontoraptor"Brontoraptor" is the informal name given to a genus of dinosaur from the Kimmeridgean stage Upper Jurassic Morrison Formation. It was a tetanuran theropod which lived in what is present-day Wyoming, and may have been a megalosaur...
" – nomen nudum - BrontosaurusApatosaurusApatosaurus , also known by the popular but scientifically deprecated synonym Brontosaurus, is a genus of sauropod dinosaur that lived from about 154 to 150 million years ago, during the Jurassic Period . It was one of the largest land animals that ever existed, with an average length of and a...
– junior synonym of ApatosaurusApatosaurusApatosaurus , also known by the popular but scientifically deprecated synonym Brontosaurus, is a genus of sauropod dinosaur that lived from about 154 to 150 million years ago, during the Jurassic Period . It was one of the largest land animals that ever existed, with an average length of and a... - BruhathkayosaurusBruhathkayosaurusBruhathkayosaurus might have been the largest dinosaur that ever lived. The accuracy of this claim, however, has been mired in controversy and debate...
- Bugenasaura – junior synonym of ThescelosaurusThescelosaurusThescelosaurus was a genus of small ornithopod dinosaur that appeared at the very end of the Late Cretaceous period in North America. It was a member of the last dinosaurian fauna before the Cretaceous-Tertiary extinction event around 65.5 million years ago...
- BuitreraptorBuitreraptorBuitreraptor is a predatory dromaeosaurid theropod dinosaur from the Cretaceous of Argentina.Buitreraptor was described in 2005. The type species is Buitreraptor gonzalezorum...
- "Byranjaffia" – nomen nudum; ByronosaurusByronosaurusByronosaurus is a genus of troodontid dinosaur which lived during the Late Cretaceous Period. It was named for Byron Jaffe, "in recognition of his family's support for the Mongolian Academy of Sciences-American Museum of Natural History Paleontological Expeditions." The first example of...
- ByronosaurusByronosaurusByronosaurus is a genus of troodontid dinosaur which lived during the Late Cretaceous Period. It was named for Byron Jaffe, "in recognition of his family's support for the Mongolian Academy of Sciences-American Museum of Natural History Paleontological Expeditions." The first example of...
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- CaenagnathasiaCaenagnathasiaCaenagnathasia is a small oviraptorosaurian theropod dinosaur from the Late Cretaceous of Uzbekistan.The type species Caenagnathasia martinsoni was named and described in 1993/1994 by Philip Currie, Stephen Godfrey and Lev Nesov...
- CaenagnathusCaenagnathusCaenagnathus is a genus of oviraptorosaurian dinosaur from the late Cretaceous . It is known from a single lower jaw, found in the Dinosaur Park Formation of Alberta, Canada.-Taxonomic history:...
– probable junior synonym of ChirostenotesChirostenotesChirostenotes is a genus of oviraptorosaurian dinosaur from the late Cretaceous of Alberta, Canada. The type species is Chirostenotes pergracilis. Some researchers recognize a second species, C... - CalamosaurusCalamosaurusCalamosaurus was a genus of small theropod dinosaur from the Barremian-age Lower Cretaceous Wessex Formation of the Isle of Wight, England...
- CalamospondylusCalamospondylusCalamospondylus was a theropod dinosaur genus. It lived during the Early Cretaceous, and its fossils were found in England. The type species, Calamospondylus oweni, was described by amateur paleontologist Reverend William D. Fox in 1866, but is based on fragmentary material...
Fox, 1866 - "CalamospondylusCalamospondylusCalamospondylus was a theropod dinosaur genus. It lived during the Early Cretaceous, and its fossils were found in England. The type species, Calamospondylus oweni, was described by amateur paleontologist Reverend William D. Fox in 1866, but is based on fragmentary material...
" Lydekker, 1889 – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as CalamosaurusCalamosaurusCalamosaurus was a genus of small theropod dinosaur from the Barremian-age Lower Cretaceous Wessex Formation of the Isle of Wight, England... - CallovosaurusCallovosaurusCallovosaurus is a genus of iguanodontian dinosaur known from most of a left thigh bone discovered in Middle Jurassic-age rocks of England. At times, it has been considered dubious or a valid genus of basal iguanodontian, perhaps a dryosaurid.-History and description:Callovosaurus is based on...
- CamarasaurusCamarasaurusCamarasaurus meaning 'chambered lizard', referring to the hollow chambers in its vertebrae was a genus of quadrupedal, herbivorous dinosaurs. It was the most common of the giant sauropods to be found in North America...
- CamelotiaCamelotiaCamelotia was a genus of prosauropod or sauropod dinosaur from the Late Triassic of what is now England. Paleontologists are divided on which family it may belong to; in the past, Camelotia has generally been assigned to the prosauropods, but this group of primitive dinosaurs is in constant...
- CamposaurusCamposaurusCamposaurus is a coelophysoid dinosaur genus from the Late Triassic of North America. With fossils dating back to the early to middle Norian stage, it is the oldest known neotheropod. It is known from partial lower leg bones, holotype UCMP 34498, and other fragmentary material...
- "CamptonotusCamptonotusCamptonotus is a genus of leaf-rolling crickets. It includes the following species:*Camptonotus affinis Rehn, 1903*Camptonotus americanus *Camptonotus australis Rehn, 1907*Camptonotus carolinensis...
" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as CamptosaurusCamptosaurusCamptosaurus is a genus of plant-eating, beaked ornithischian dinosaurs of the Late Jurassic period of western North America. The name means 'flexible lizard', .... - CamptosaurusCamptosaurusCamptosaurus is a genus of plant-eating, beaked ornithischian dinosaurs of the Late Jurassic period of western North America. The name means 'flexible lizard', ....
- "Campylodon" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as CampylodoniscusCampylodoniscusCampylodoniscus is a genus of sauropod dinosaur from the Late Cretaceous Period of what is now Argentina.The type species was first named and described by Friedrich von Huene in 1929 as Campylodon ameghinoi, the genus name meaning 'bent tooth', from Greek καμπυλος, 'bent' or 'curved' and ὀδών... - CampylodoniscusCampylodoniscusCampylodoniscus is a genus of sauropod dinosaur from the Late Cretaceous Period of what is now Argentina.The type species was first named and described by Friedrich von Huene in 1929 as Campylodon ameghinoi, the genus name meaning 'bent tooth', from Greek καμπυλος, 'bent' or 'curved' and ὀδών...
- "CapitalsaurusCapitalsaurus"Capitalsaurus" is the informal name given to a genus of dinosaur from North America. Its fossils were discovered in Washington, DC. It was a theropod, and it lived during the Cretaceous...
" – nomen nudum - CarcharodontosaurusCarcharodontosaurusCarcharodontosaurus was a gigantic carnivorous carcharodontosaurid dinosaur that lived around 100 to 93 million years ago, during the late Albian to early Cenomanian stages of the mid-Cretaceous Period...
- CardiodonCardiodonCardiodon was a genus of sauropod dinosaur, based on a tooth from the late Bathonian-age Middle Jurassic Forest Marble Formation of Wiltshire, England...
- "CarnosaurusCarnosauriaCarnosauria is a group of large predatory dinosaurs that lived during the Jurassic and Cretaceous periods. While it originally contained a wide assortment of giant theropods that were not closely related, the group has since been defined to encompass only the allosaurs and their closest kin...
" – nomen nudum, probably a typographical error for "carnosaur" - CarnotaurusCarnotaurusCarnotaurus was a large predatory dinosaur. Only one species, Carnotaurus sastrei has been described so far.Carnotaurus lived in Patagonia, Argentina during the Campanian or Maastrichtian stage of the Late Cretaceous...
- CaseosaurusCaseosaurusCaseosaurus is a genus of dinosaur from the Late Triassic of North America. The type species, Caseosaurus crosbyensis, was formally described by Hunt, Lucas, Heckert, Sullivan and Lockley in 1998. It was found in the Dockum Formation of Texas, in strata dating to the Late Triassic...
- CathartesauraCathartesauraCathartesaura is a genus of rebbachisaurid sauropod dinosaur hailing from the Late Cretaceous strata of the Huincul Formation located in the "La Buitrera" locality, Río Negro Province, Argentina. The fossil remains, described by Gallina and Apesteguía in 2005, consist of a partial skeleton...
- Cathetosaurus – junior synonym of CamarasaurusCamarasaurusCamarasaurus meaning 'chambered lizard', referring to the hollow chambers in its vertebrae was a genus of quadrupedal, herbivorous dinosaurs. It was the most common of the giant sauropods to be found in North America...
- CaudipteryxCaudipteryxCaudipteryx is a genus of peacock-sized theropod dinosaurs that lived in the Aptian age of the early Cretaceous Period . They were feathered and remarkably birdlike in their overall appearance....
- Caudocoelus – junior synonym of TeinurosaurusTeinurosaurusTeinurosaurus is a genus of carnivorous theropod dinosaur. Teinurosaurus lived during the Late Jurassic in what is now Portugal. Only a single caudal vertebra has ever been discovered, and the genus is usually considered a nomen dubium...
- Caulodon – junior synonym of CamarasaurusCamarasaurusCamarasaurus meaning 'chambered lizard', referring to the hollow chambers in its vertebrae was a genus of quadrupedal, herbivorous dinosaurs. It was the most common of the giant sauropods to be found in North America...
- CedarosaurusCedarosaurusCedarosaurus was a nasal-crested macronarian dinosaur genus from the Early Cretaceous Period . It was a sauropod which lived in what is now Utah...
- CedarpeltaCedarpeltaCedarpelta is an extinct genus of basal ankylosaurid ankylosaur, based on material recovered from the Lower Cretaceous of North America. The skull lacks extensive cranial ornamentation, a trait which has been interpreted as plesiomorphic for ankylosaurs....
- CedrorestesCedrorestesCedrorestes is a genus of iguanodontian dinosaur from the Early Cretaceous of Utah...
- CentemodonCentemodonCentemodon is an extinct genus of phytosaur from the Late Triassic Period. It lived in what is now present-day North America. It is classified as a nomen dubium.-References:* in the Dinosaur On-Line Omnipedia...
– actually a phytosaurPhytosaurPhytosaurs are an extinct group of large semi-aquatic Late Triassic archosaurs. Phytosaurs belong to the family Phytosauridae and the order Phytosauria. They were long-snouted and heavily armoured, bearing a remarkable resemblance to modern crocodiles in size, appearance, and lifestyle, an example... - CentrosaurusCentrosaurusCentrosaurus is a genus of herbivorous ceratopsian dinosaurs from the late Cretaceous of Canada. Their remains have been found in the Dinosaur Park Formation and uppermost Oldman Formation, dating from 76.5 to 75.5 million years ago....
- CerasinopsCerasinopsCerasinops was a small ceratopsian dinosaur. It lived during the Campanian of the late Cretaceous Period. Its fossils have been found in Two Medicine Formation, in Montana....
- CeratonykusCeratonykusCeratonykus is a genus of alvarezsaurid theropod dinosaur that existed in the late Cretaceous period. The discovery of a fragmented skeleton in Mongolia in early 2009 has led scientists to question where alvarezsaurids fit taxonomically into Theropoda.-Description:Ceratonykus was a small,...
- CeratopsCeratopsCeratops is a dubious genus of ceratopsian dinosaur which lived during the Late Cretaceous. Its fossils have been found in Montana. Although poorly known, Ceratops is important in the history of dinosaurs, since it is the type species for which both Ceratopsia and Ceratopsidae are named...
- CeratosaurusCeratosaurusCeratosaurus meaning "horned lizard", in reference to the horn on its nose , was a large predatory theropod dinosaur from the Late Jurassic Period , found in the Morrison Formation of North America, in Tanzania and Portugal...
- CetiosauriscusCetiosauriscusCetiosauriscus is a genus of sauropod dinosaur. It was perhaps a diplodocid, a close relative of Diplodocus, and lived in the Callovian of England Cetiosauriscus (meaning "whale-lizard-like" i.e. "Cetiosaurus-like") is a genus of sauropod dinosaur. It was perhaps a diplodocid, a close relative of...
- CetiosaurusCetiosaurusCetiosaurus meaning 'whale lizard', from the Greek cetus/κητος meaning 'sea monster' and saurus/σαυρος meaning 'lizard', was a sauropod dinosaur from the Mid to Late Jurassic Period in what are now Europe and Africa. It is estimated to have been about long and to have weighed roughly...
- ChangchunsaurusChangchunsaurusChangchunsaurus is an extinct genus of small herbivorous ornithopod dinosaur from Early Cretaceous deposits of Gongzhuling, Jilin, China. It is the first named dinosaur genus from Jilin.-Description:...
- "ChangdusaurusChangdusaurus"Changdusaurus" is the informal name given to a genus of dinosaur from the Late Jurassic Period. It lived in what is now present-day China. "Changdusaurus" is classified as a stegosaurid. The type species was named "Changdusaurus laminoplacodus" by Zhao in 1986, but it has never been formally...
" – nomen nudum - "Changtusaurus" – variant spelling of "ChangdusaurusChangdusaurus"Changdusaurus" is the informal name given to a genus of dinosaur from the Late Jurassic Period. It lived in what is now present-day China. "Changdusaurus" is classified as a stegosaurid. The type species was named "Changdusaurus laminoplacodus" by Zhao in 1986, but it has never been formally...
" - Chaoyangosaurus – misspelling of ChaoyangsaurusChaoyangsaurusChaoyangsaurus was a marginocephalian dinosaur from the Late Jurassic of China...
- ChaoyangsaurusChaoyangsaurusChaoyangsaurus was a marginocephalian dinosaur from the Late Jurassic of China...
- CharonosaurusCharonosaurusCharonosaurus |Charon]]'s lizard") is the name of a genus of dinosaur whose fossils were discovered by Godefroit, Zan & Jin in 2000 on the south bank of the Amur River, dividing China from Russia.-Description:...
- ChasmosaurusChasmosaurusChasmosaurus is a genus of ceratopsid dinosaur from the Upper Cretaceous Period of North America. Its name means 'opening lizard', referring to the large openings in its frill . With a length of and a weight of , Chasmosaurus was a ceratopsian of average size...
- Chassternbergia – junior synonym of EdmontoniaEdmontoniaEdmontonia was an armoured dinosaur, a part of the nodosaur family from the Late Cretaceous Period. It is named after the Edmonton Formation , the unit of rock it was found in.-Description:...
- ChebsaurusChebsaurusChebsaurus is a genus of quadrupedal, herbivorous, cetiosaurid sauropod dinosaur, specifically a eusauropod. It lived in present day Algeria, in the Middle Jurassic Period. The type species, C. algeriensis, was named in 2005 by Farida Mahammed and is the most complete Algerian sauropod known...
- Cheneosaurus – junior synonym of HypacrosaurusHypacrosaurusHypacrosaurus was a genus of duckbill dinosaur similar in appearance to Corythosaurus. Like Corythosaurus, it had a tall, hollow rounded crest, although not as large and straight...
- ChialingosaurusChialingosaurusChialingosaurus is a genus of stegosaur similar to Kentrosaurus from the Upper Shaximiao Formation, Late Jurassic beds in Sichuan Province in China. Its age makes it one of the oldest species of stegosaurs, living about 160 million years ago...
- ChiayusaurusChiayusaurusChiayusaurus was a genus of sauropod dinosaur known from teeth found in Asia. Two species have been named for this obscure genus. It was originally named as Chiayüsaurus, but the ICZN does not permit special characters, so it has become Chiayusaurus...
- ChienkosaurusSzechuanosaurusSzechuanosaurus is a dubious genus of theropod dinosaur from the Late Jurassic. This dinosaur lived in the Asia in the Oxfordian and early Kimmeridgian . It is based on four undiagnostic teeth from the Shangshaximiao Formation.-Discovery and species:Three species have been assigned to this genus...
– actually a chimeraChimera (paleontology)In paleontology, a chimera is a fossil which was reconstructed with elements coming from more than a single species of animal. A now classic example of chimera is Protoavis.-List of paleontological chimeras:*Brontosaurus*Lametasaurus...
of crocodiliaCrocodiliaCrocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
n and theropod (SzechuanosaurusSzechuanosaurusSzechuanosaurus is a dubious genus of theropod dinosaur from the Late Jurassic. This dinosaur lived in the Asia in the Oxfordian and early Kimmeridgian . It is based on four undiagnostic teeth from the Shangshaximiao Formation.-Discovery and species:Three species have been assigned to this genus...
) remains - "Chihuahuasaurus" – nomen nudum; SonorasaurusSonorasaurusSonorasaurus is a genus of brachiosaurid dinosaur from the middle Cretaceous . It was a herbivorous sauropod whose fossils have been found in southern Arizona in the United States. Its name, which means "Sonora lizard", comes from the Sonoran Desert where its fossils were first found...
- ChilantaisaurusChilantaisaurusChilantaisaurus is a genus of neovenatorid theropod dinosaur from the late Cretaceous Ulansuhai Formation of China . The type species, C. tashuikouensis, was described by Hu in 1964. Chilantaisaurus was a large theropod, estimated as weighing between and...
- ChindesaurusChindesaurusChindesaurus is a genus of saurischian dinosaur named after Chinde Point , near where the genoholotype specimen was discovered in the Chinle Formation of Petrified Forest National Park, Arizona, by Bryan Small in 1985...
- ChingkankousaurusChingkankousaurusChingkankousaurus is the name given to a fossilized bone fragment that probably belonged to a theropod dinosaur from the late Cretaceous Period Wangshi Series of Shandong province in eastern China. It was identified by Yang Zhongjian Chingkankousaurus (named for the Ch'ing-kang-kou village) is...
- ChinshakiangosaurusChinshakiangosaurusChinshakiangosaurus was a genus of dinosaur from the Early Jurassic Period. It lived in what is now present-day China. It is classified as a sauropod, but is not well known. The type species, Chinshakiangosaurus chuhghoensis, was first named by Ye, but described by Dong Zhiming in 1992...
- ChirostenotesChirostenotesChirostenotes is a genus of oviraptorosaurian dinosaur from the late Cretaceous of Alberta, Canada. The type species is Chirostenotes pergracilis. Some researchers recognize a second species, C...
- ChondrosteosaurusChondrosteosaurusChondrosteosaurus was a sauropod from Early Cretaceous England.The type species, Chondrosteosaurus gigas, was described and named by Richard Owen in 1876. The fossils of Chondrosteosaurus were discovered in the Wessex Formation on the Isle of Wight. C...
- Chondrosteus – misspelling of ChondrosteosaurusChondrosteosaurusChondrosteosaurus was a sauropod from Early Cretaceous England.The type species, Chondrosteosaurus gigas, was described and named by Richard Owen in 1876. The fossils of Chondrosteosaurus were discovered in the Wessex Formation on the Isle of Wight. C...
- ChromogisaurusChromogisaurusChromogisaurus is a sauropodomorph which existed in Argentina during the late Triassic period.Chromogisaurus was first named by Martín Daniel Ezcurra in 2010, and the type species is Chromogisaurus novasi. The generic name is derived from Greek chroma, "colour", and gè, "earth", a reference to the...
- ChuandongocoelurusChuandongocoelurusChuandongocoelurus named after the Chuandong in Sichuan Province, China, was a genus of tetanuran theropod dinosaur first described by Chinese paleontologist He in 1984...
- ChuanjiesaurusChuanjiesaurusChuanjiesaurus was a genus of dinosaur from the Middle Jurassic Period. It lived in what is now present-day China. It is classified as a sauropod. The type species, Chuanjiesaurus ananensis, was first described by Fang, Pang, Lü, Zhang, Pan, Wang, Li and Cheng in 2000...
- ChubutisaurusChubutisaurusChubutisaurus is a genus of dinosaur from the Early Cretaceous Period. It lived in South America. It is classified as a sauropod, specifically one of the titanosaurs. The type species, C. insignis, was described by del Corro in 1975. Its fossils were found in the Cerro Barcino Formation, Albian...
- ChungkingosaurusChungkingosaurusChungkingosaurus, meaning "Chongqing Lizard", is a genus of dinosaur from the Late Jurassic-age Upper Shaximiao Formation in what is now China. It is classified as a stegosaurid.-Discovery and species:...
- ChuxiongosaurusChuxiongosaurusChuxiongosaurus is a genus of basal sauropodomorph dinosaur which lived during the Early Jurassic Period. Fossils of this genus have been found in the Lower Lufeng Formation, Yunnan Province, southern China...
- "CinizasaurusCinizasaurus"Cinizasaurus" is an informal name for fossilized remains from the Late Triassic of New Mexico that were initially interpreted as belonging to a theropod dinosaur. The remains, NMMNH P-18400, consist of a tibia, vertebrae, and fragments, and came from the ?late Carnian-age Upper Triassic Bluewater...
" – nomen nudum - CionodonCionodonCionodon was a genus of dinosaur from the Late Cretaceous Period. The type species, Cionodon arctatus lived in what is now present-day Colorado. It is classified as a hadrosaur, and was formally described by Edward Drinker Cope in 1874. It is a nomen dubium because it is based on very fragmentary...
- CitipatiCitipatiCitipati is a genus of oviraptorid theropod dinosaur from the Late Cretaceous Period of what is now Mongolia . It is one of the best-known oviraptorids, thanks to a number of well-preserved skeletons, including several specimens found in brooding positions atop nests of eggs...
- Cladeiodon – actually a non-dinosaurian rauisuchiaRauisuchiaRauisuchia is a group of predatory and mostly large Triassic archosaurs. As a clade, Rauisuchia includes these Triassic forms and all crocodylomorphs, which are descendants of Triassic rauisuchians. The group in its traditional sense is paraphyletic, because it does not include crocodylomorph...
n (TeratosaurusTeratosaurusTeratosaurus was a genus of rauisuchian known from the Triassic Stubensandstein of Germany...
) - ClaorhynchusClaorhynchusClaorhynchus is a dubious genus of ornithischian dinosaur with a confusing history behind it...
– possibly TriceratopsTriceratopsTriceratops is a genus of herbivorous ceratopsid dinosaur which lived during the late Maastrichtian stage of the Late Cretaceous Period, around 68 to 65 million years ago in what is now North America. It was one of the last dinosaur genera to appear before the great Cretaceous–Paleogene... - ClaosaurusClaosaurusClaosaurus is a genus of primitive hadrosaurid that lived during the Late Cretaceous Period .Evidence of its existence was first found near the Smoky Hill River in Kansas, USA in the form of partial skull fragments and as an articulated postcranial skeleton...
- Clarencea – actually a sphenosuchiaSphenosuchiaSphenosuchia is a suborder of basal crocodylomorphs that first appeared in the Triassic and occurred into the Late Jurassic. Most were small, gracile animals with an erect limb posture. They are now thought to be ancestral to crocodyliforms, which include all living crocodilians.-Stratigraphic...
n (SphenosuchusSphenosuchusSphenosuchus is an extinct genus of sphenosuchian from the Elliot Formation of South Africa, discovered and described early in the 20th century. The skull is excellently preserved but other than elements of the forelimb and isolated parts of the hind limb, the Sphenosuchus material is incomplete...
) - ClasmodosaurusClasmodosaurusClasmodosaurus was a genus of dinosaur, probably a sauropod. It lived during the Cretaceous in what is now Argentina. It is considered a nomen dubium because it is known only from fossilized teeth, and is therefore a tooth taxon....
- Clepsysaurus – actually a non-dinosaurian archosaurArchosaurArchosaurs are a group of diapsid amniotes whose living representatives consist of modern birds and crocodilians. This group also includes all extinct non-avian dinosaurs, many extinct crocodilian relatives, and pterosaurs. Archosauria, the archosaur clade, is a crown group that includes the most...
, except for C. fraserianus, which is part of the taxonomy of PalaeosaurusPalaeosaurusSeveral very different genera of prehistoric animals have been named Palaeosaurus or Paleosaurus since the 1830s. Further confusing the matter, all of the species are poorly known or poorly preserved and both spellings have been used interchangeably, even by the same authors.The repeated recurrence... - "Clevelanotyrannus" – nomen nudum; NanotyrannusNanotyrannusNanotyrannus is a genus of tyrannosaurid dinosaur, known only from two juvenile specimens, which may in fact represent juvenile specimens of the contemporary species Tyrannosaurus rex.-History:...
- CoahuilaceratopsCoahuilaceratopsCoahuilaceratops is a genus of herbivorous ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now southern Coahuila in northern Mexico. It is known from the holotype CPC 276, a partial skeleton of an adult individual which...
- CoelophysisCoelophysisCoelophysis , meaning "hollow form" in reference to its hollow bones , is one of the earliest known genera of dinosaur...
- "Coelosaurus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as OrnithomimusOrnithomimusOrnithomimus is a genus of ornithomimid dinosaur from the Late Cretaceous Period of what is now North America.In 1890 Ornithomimus velox was named by Othniel Charles Marsh on the basis of a foot and partial hand from the Maastrichtian Denver Formation. Another seventeen species have been named since...
and ArchaeornithomimusArchaeornithomimusArchaeornithomimus is a genus of ornithomimosaurian theropod dinosaur from the Late Cretaceous of China, 70 million years ago....
. - CoeluroidesCoeluroidesCoeluroides is a nomen dubium. A small, little-known dinosaur, specifically a theropod, Coeluroides lived during the Late Cretaceous Period in what is now India. It is known from scattered tail vertebrae discovered in the Lameta Formation...
- CoelurosauravusCoelurosauravusCoelurosauravus is a genus of basal diapsid reptile, with specialized wing-like structures allowing it to glide. These were rod like structures with skin stretched over them; this feature is unique to the genus....
– actually an avicephalaAvicephalathumb|right|Artist's reconstruction of [[Coelurosauravus]]Avicephala is a possibly polyphyletic and therefore disused clade of diapsid reptiles that lived during the Late Permian and Triassic periods...
n diapsidDiapsidDiapsids are a group of reptiles that developed two holes in each side of their skulls, about 300 million years ago during the late Carboniferous period. Living diapsids are extremely diverse, and include all crocodiles, lizards, snakes, and tuatara... - "CoelurosaurusCoelurosauriaCoelurosauria is the clade containing all theropod dinosaurs more closely related to birds than to carnosaurs. In the past, it was used to refer to all small theropods, although this classification has been abolished...
" – nomen nudum, probably a typographical error for "coelurosaur" - CoelurusCoelurusCoelurus is a genus of coelurosaur dinosaur from the Late Jurassic period . The name means "hollow tail", referring to its hollow tail vertebrae...
- ColepiocephaleColepiocephaleColepiocephale is a genus of pachycephalosaurid dinosaur from Late Cretaceous deposits of Alberta, Canada. It was collected from the Foremost Formation . The type species, C. lambei, was originally described by Sternberg , and later renamed by Sullivan in 2003. C...
- ColonosaurusIchthyornisIchthyornis is a genus of toothed seabirds from the Late Cretaceous of North America. Its fossil remains are known from the chalks of Alberta, Alabama, Kansas, New Mexico, Saskatchewan, and Texas, in strata that were laid down in the Western Interior Seaway during the Turonian-Campanian ages,...
– junior synonym of the birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
Ichthyornis disparIchthyornisIchthyornis is a genus of toothed seabirds from the Late Cretaceous of North America. Its fossil remains are known from the chalks of Alberta, Alabama, Kansas, New Mexico, Saskatchewan, and Texas, in strata that were laid down in the Western Interior Seaway during the Turonian-Campanian ages,... - "Coloradia" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as ColoradisaurusColoradisaurusColoradisaurus is a genus of massospondylid sauropodomorph dinosaur. It lived during the Late Triassic period in what is now La Rioja Province, Argentina. It is known from the holotype PVL 5904, nearly complete skull... - ColoradisaurusColoradisaurusColoradisaurus is a genus of massospondylid sauropodomorph dinosaur. It lived during the Late Triassic period in what is now La Rioja Province, Argentina. It is known from the holotype PVL 5904, nearly complete skull...
- "Colossosaurus" – nomen nudum; PelorosaurusPelorosaurusPelorosaurus was a huge plant-eating dinosaur. Pelorosaurus was one of the first sauropod dinosaurs ever discovered. Pelorosaurus lived during the Early Cretaceous period, about 138-112 million years ago. Fossils referred to Pelorosaurus have been found in England and Portugal...
- "ComanchesaurusComanchesaurus"Comanchesaurus" is an informal name for fossilized remains from the Late Triassic of New Mexico that were initially interpreted as belonging to a theropod dinosaur. The remains, NMMNH P-4569, consist of a partial skeleton including vertebral centra and hindlimb bones, and came from the Norian-age...
" – nomen nudum - CompsognathusCompsognathusCompsognathus was a small, bipedal, carnivorous theropod dinosaur. The animal was the size of a turkey and lived around 150 million years ago, the early Tithonian stage of the late Jurassic Period, in what is now Europe. Paleontologists have found two well-preserved fossils, one in Germany...
- CompsosuchusCompsosuchusCompsosuchus is an extinct genus of abelisaurian dinosaur. It lived during the Late Cretaceous. It lived in India. Compsosuchus was described in 1933 by von Huene and Matley. The type species is C. solus. The genus is often considered a nomen dubium.-References:* at Dino Russ's Lair...
- ConcavenatorConcavenatorConcavenator is a genus of theropod dinosaur that lived approximately 130 million years ago during the early Cretaceous period . The type species is C. corcovatus; Concavenator corcovatus means "hump backed hunter from Cuenca"...
- ConchoraptorConchoraptorConchoraptor is a genus of oviraptorid dinosaur from the late Cretaceous Period of what is now Asia.-Description:...
- CondorraptorCondorraptorCondorraptor is a genus of megalosauroid theropod dinosaur. It lived during the Middle Jurassic in what is now Argentina, Canadon Asfalto Formation. The type species, described in 2005, is Condorraptor currumili. It is based on a tibia, with an associated partial skeleton that may belong to the...
- CorythosaurusCorythosaurusCorythosaurus is a genus of duck-billed dinosaur from the Upper Cretaceous Period, about 77-76.5 million years ago. It lived in what is now North America...
- CraspedodonCraspedodonCraspedodon is an extinct genus of ornithischian dinosaur, possibly a ceratopsian. It lived during the Late Cretaceous , in what is now Belgium. Only a few teeth have ever been found, which were described as similar to those of Iguanodon...
- Crataeomus – junior synonym of StruthiosaurusStruthiosaurusStruthiosaurus is one of the smallest known and most basal genera of nodosaurid dinosaurs, from the Late Cretaceous period of Austria, Romania and France in Europe. It was protected by body armour...
- CraterosaurusCraterosaurusCraterosaurus was a genus of stegosaurid dinosaur. It lived during the Early Cretaceous around 145-136 million years ago. Its fossils were found in England...
- Creosaurus – junior synonym of AllosaurusAllosaurusAllosaurus is a genus of large theropod dinosaur that lived 155 to 150 million years ago during the late Jurassic period . The name Allosaurus means "different lizard". It is derived from the Greek /allos and /sauros...
- CrichtonsaurusCrichtonsaurusCrichtonsaurus is a genus of ankylosaurid ankylosaur dinosaur named for Michael Crichton, the author of Jurassic Park. It was an ankylosaurine, and it lived during the late Cretaceous Period. Its fossils were discovered in China, and it was formally described by Dong Zhiming in 2002. The type...
- CristatusaurusCristatusaurusCristatusaurus is an extinct genus of spinosaurid theropod dinosaur. It lived during the Early Cretaceous Period of what is now Africa....
- CrosbysaurusCrosbysaurusCrosbysaurus was an archosauriform genus of unknown affinities Crosbysaurus was an archosauriform genus of unknown affinities Crosbysaurus was an archosauriform genus of unknown affinities (Irmis et al. (2006), initially described as a basal ornithischian dinosaur, and known only from teeth. ...
– actually a non-dinosaurian archosauriform - CruxicheirosCruxicheirosCruxicheiros is a genus of tetanuran theropod dinosaur which lived in the Middle Jurassic of England. The type species is C. newmanorum, described by Roger Benson and Jonathan Radley in 2010.-Discovery:...
- CryolophosaurusCryolophosaurusCryolophosaurus was a large theropod dinosaur, with a crest on its head that looked like a Spanish comb. Due to the resemblance of this feature to Elvis Presley's pompadour haircut from the 1950s, this dinosaur was at one point informally known as "Elvisaurus".Cryolophosaurus was excavated from...
- Cryptodraco – junior synonym (unneeded replacement name) of CryptosaurusCryptosaurusCryptosaurus is a dubious genus of dinosaur known from a partial femur from the Late Jurassic of England.The femur was found by the geologist Lucas Ewbank and donated by him to the Woodwardian Museum at Cambridge in 1869. Cryptosaurus was the same year named by British paleontologist Harry Seeley;...
- "CryptoraptorCryptoraptor"Cryptoraptor" is an informal name for fossilized remains from the Late Triassic of New Mexico that were initially interpreted as belonging to a dinosaur. The remains, NMMNH P-17375, consist of a fragmentary skeleton including vertebrae, a pubis, and parts of the thigh bones...
" – nomen nudum - CryptosaurusCryptosaurusCryptosaurus is a dubious genus of dinosaur known from a partial femur from the Late Jurassic of England.The femur was found by the geologist Lucas Ewbank and donated by him to the Woodwardian Museum at Cambridge in 1869. Cryptosaurus was the same year named by British paleontologist Harry Seeley;...
- Cryptovolans – junior synonym of MicroraptorMicroraptorMicroraptor is a genus of small, four-winged dromaeosaurid dinosaurs. Numerous well-preserved fossil specimens have been recovered from Liaoning, China...
- CumnoriaCumnoriaCumnoria is a genus of herbivorous iguanodontian dinosaur. It is a basal iguanodontian which lived during the upper Jurassic period in what is now Oxfordshire, United Kingdom....
- "Cylindricodon" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as HylaeosaurusHylaeosaurusHylaeosaurus is the most obscure of the three animals used by Sir Richard Owen to first define the new group Dinosauria, in 1842. The original specimen, recovered by Gideon Mantell from the Tilgate Forest in the south of England in 1832, now resides in the Natural History Museum of London, where... - Cystosaurus – actually a crocodiliaCrocodiliaCrocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
n which through a typographical error was confused with CryptosaurusCryptosaurusCryptosaurus is a dubious genus of dinosaur known from a partial femur from the Late Jurassic of England.The femur was found by the geologist Lucas Ewbank and donated by him to the Woodwardian Museum at Cambridge in 1869. Cryptosaurus was the same year named by British paleontologist Harry Seeley;...
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- DaanosaurusDaanosaurusDaanosaurus was a genus of dinosaur. It was a brachiosaurid sauropod which lived during the Late Jurassic. It lived in what is now China, and was similar to Bellusaurus.The type species, described in 2005, is Daanosaurus zhangi.-References:...
- DacentrurusDacentrurusDacentrurus , originally known as Omosaurus, was a large stegosaur of the Late Jurassic Period .-Description:...
- "DachongosaurusDachongosaurus"Dachongosaurus" is the informal name given to an undescribed genus of sauropod dinosaur from the Early Jurassic of China. It is known from fossils including at least a partial articulated skeleton from the Dark Red Beds of the Lower Lufeng Series in Yunnan. Possibly a cetiosaur, the "type...
" – nomen nudum - "Dachungosaurus" – variant spelling of "DachongosaurusDachongosaurus"Dachongosaurus" is the informal name given to an undescribed genus of sauropod dinosaur from the Early Jurassic of China. It is known from fossils including at least a partial articulated skeleton from the Dark Red Beds of the Lower Lufeng Series in Yunnan. Possibly a cetiosaur, the "type...
" - DaemonosaurusDaemonosaurusDaemonosaurus is a genus of theropod dinosaur from the Late Triassic of New Mexico. Fossils have been found from deposits in the Chinle Formation, which is latest Triassic in age. While theropods had diversified into several specialized groups by this time, Daemonosaurus is a basal theropod that...
- DakosaurusDakosaurusDakosaurus is an extinct genus within the family Metriorhynchidae that lived during the Late Jurassic and Early Cretaceous. It was large, with teeth that were serrated and compressed lateromedially . The genus was established by Friedrich August von Quenstedt in 1856 for an isolated tooth named...
– actually a metriorhynchid crocodiliaCrocodiliaCrocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
n - DakotadonDakotadonDakotadon is a genus of iguanodont dinosaur from the Barremian-age Lower Cretaceous Lakota Formation of South Dakota, USA, known from a partial skull. It was first described in 1989 as Iguanodon lakotaensis, by David B. Weishampel and Philip R. Bjork. Its assignment has been controversial. Some...
- "DamalasaurusDamalasaurus"Damalasaurus" is the informal name given to a genus of herbivorous dinosaur from the Early Jurassic. It was a sauropod, though its exact classification within the clade is unknown. Fossils of "Damalasaurus", including a rib, have been found in the Middle Daye Group of Tibet...
" – nomen nudum - DandakosaurusDandakosaurusDandakosaurus is a genus of theropod dinosaur from Andhra Pradesh, India. It lived 183 - 175 million years ago in the Toarcian, Early Jurassic. It is currently classified as Neoceratosauria incertae sedis but may in fact be a ceratosaurid or basal tetanuran.The type species, D. indicus, was named...
- Danubiosaurus – junior synonym of StruthiosaurusStruthiosaurusStruthiosaurus is one of the smallest known and most basal genera of nodosaurid dinosaurs, from the Late Cretaceous period of Austria, Romania and France in Europe. It was protected by body armour...
- "Daptosaurus" – nomen nudum; early manuscript name for DeinonychusDeinonychusDeinonychus was a genus of carnivorous dromaeosaurid dinosaur. There is one described species, Deinonychus antirrhopus. This 3.4 meter long dinosaur lived during the early Cretaceous Period, about 115–108 million years ago . Fossils have been recovered from the U.S...
- DashanpusaurusDashanpusaurusDashanpusaurus is an extinct genus of sauropod dinosaur that lived during the middle of the Jurassic period. The dinosaur was described in 2005 by a group of Chinese paleontologists. The dinosaur's binomial name, Dashanpusaurus dongi, was named after a prolific dinosaur expert of the Dashanpu...
- DaspletosaurusDaspletosaurusDaspletosaurus is a genus of tyrannosaurid theropod dinosaur that lived in western North America between 77 and 74 million years ago, during the Late Cretaceous Period. Fossils of the only named species were found in Alberta, although other possible species from Alberta and Montana await...
- Dasygnathoides – actually a non-dinosaurian archosaurArchosaurArchosaurs are a group of diapsid amniotes whose living representatives consist of modern birds and crocodilians. This group also includes all extinct non-avian dinosaurs, many extinct crocodilian relatives, and pterosaurs. Archosauria, the archosaur clade, is a crown group that includes the most...
, junior synonym of OrnithosuchusOrnithosuchusOrnithosuchus is an extinct genus of crurotarsan from the Late Triassic Lossiemouth Sandstone of Scotland... - "DasygnathusOrnithosuchusOrnithosuchus is an extinct genus of crurotarsan from the Late Triassic Lossiemouth Sandstone of Scotland...
" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as DasygnathoidesOrnithosuchusOrnithosuchus is an extinct genus of crurotarsan from the Late Triassic Lossiemouth Sandstone of Scotland... - DatousaurusDatousaurusDatousaurus, meaning either "Chieftain lizard" or "Big-head Lizard" was a dinosaur from the Middle Jurassic. It was a sauropod collected from the Lower Shaximiao Formation in Dashanpu, Zigong Sichuan province, China...
- DaxiatitanDaxiatitanDaxiatitan is a genus of titanosauriform dinosaur from the Lower Cretaceous of Lanzhou Basin, Gansu Province, northwestern China. It is known from fossils including several neck vertebrae, a shoulder blade, and a thigh bone....
- DeinocheirusDeinocheirusDeinocheirus is a genus of large theropod dinosaur, possibly an ornithomimosaurian, which lived in what is now southern Mongolia, during the late Cretaceous Period .-Discovery and naming:...
- DeinodonDeinodonDeinodon is a name assigned to tyrannosaurid teeth of the Late Cretaceous of Montana by paleontologist Joseph Leidy in 1856...
– possibly GorgosaurusGorgosaurusGorgosaurus is a genus of tyrannosaurid theropod dinosaur that lived in western North America during the Late Cretaceous Period, between about 76.5 and 75 million years ago. Fossil remains have been found in the Canadian province of Alberta and possibly the U.S. state of Montana.... - DeinonychusDeinonychusDeinonychus was a genus of carnivorous dromaeosaurid dinosaur. There is one described species, Deinonychus antirrhopus. This 3.4 meter long dinosaur lived during the early Cretaceous Period, about 115–108 million years ago . Fossils have been recovered from the U.S...
- DelapparentiaDelapparentiaDelapparentia is a genus of iguanodont dinosaur from the Early Cretaceous period of Galve, Teruel Province, Spain.The type specimen, MPT/I.G, was found in the Spring of 1958 by amateur palaeontologist José María Herrero Marzo...
- DeltadromeusDeltadromeusDeltadromeus is a genus of large basal ceratosaurian theropod dinosaur from Northern Africa. It had long, unusually slender hind limbs for its size, suggesting that it was a swift runner. The skull is not known. Two fossil specimens of a single species Deltadromeus (meaning "delta runner") is a...
- DemandasaurusDemandasaurusDemandasaurus is a genus of rebbachisaurid sauropod from early Cretaceous deposits of Spain. Demandasaurus is known from an incomplete but associated skeleton that includes cranial and postcranial remains. It was collected from the Castrillo la Reina Formation in Burgos Province of Spain...
- Denversaurus – junior synonym of EdmontoniaEdmontoniaEdmontonia was an armoured dinosaur, a part of the nodosaur family from the Late Cretaceous Period. It is named after the Edmonton Formation , the unit of rock it was found in.-Description:...
- DeuterosaurusDeuterosaurusDeuterosaurus is a genus of the Therapsids, one of the "mammal-like” reptiles dominating land during the late Palaeozoic.-Anatomy:Skulls of Deuterosaurus are well-known from several finds. They were around 80 cm with a long snout and conical teeth. Like all anteosaurs, the skull possessed long,...
– actually a therapsid - DiabloceratopsDiabloceratopsDiabloceratops is a genus of herbivorous dinosaur in the infraorder Ceratopsia. It lived in and around Utah during the Campanian stage.-Name:...
- DiamantinasaurusDiamantinasaurusDiamantinasaurus is a genus of derived titanosaurian dinosaur from late Albian -age rocks of Australia...
- DianchungosaurusDianchungosaurusDianchungosaurus is an extinct genus of mesoeucrocodylian crocodylomorph from the Early Jurassic of China. It was previously considered a dinosaur, but it was recently reclassified as a mesoeucrocodylian by Paul Barrett and Xing Xu . It is probably the same animal as the informally named...
– actually a crocodiliaCrocodiliaCrocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
n - "DiceratopsDiceratopsDiceratops can refer to:* Diceratops, a genus of hymenopteran insect* Diceratops, former name for a genus of ceratopsian dinosaur preoccupied by a hymenopteran insect. Re-named Nedoceratops but possibly synonymous with Triceratops....
" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as Nedoceratops - Diceratus – junior synonym of Nedoceratops
- DicloniusDicloniusDiclonius is a genus of dinosaur from the Late Cretaceous. It was a hadrosaur based solely on teeth. Its fossils have been found in North America. The name is in reference to the method of tooth replacement, in which newly erupting replacement teeth could be in functional use at the same time as...
- DicraeosaurusDicraeosaurusDicraeosaurus is a genus of small diplodocoid sauropod dinosaur. It was named for the spines on the back of the neck. The first fossil was described by paleontologist Werner Janensch in 1914.Unlike most diplodocoids, Dicraeosaurus had a large head with a relatively short and wide neck...
- Didanodon – possibly a junior synonym of LambeosaurusLambeosaurusLambeosaurus is a genus of hadrosaurid dinosaur that lived about 76 to 75 million years ago, in the Late Cretaceous Period of North America. This bipedal/quadrupedal, herbivorous dinosaur is known for its distinctive hollow cranial crest, which in the best-known species resembled a hatchet...
- DilongDilong (dinosaur)Dilong is a genus of small tyrannosauroid dinosaur. The only species is Dilong paradoxus. It is from the Lower Cretaceous Yixian Formation near Lujiatun, Beipiao, in the western Liaoning province of China. It lived about 130 million years ago...
- DilophosaurusDilophosaurusDilophosaurus was a theropod dinosaur from the Sinemurian stage of the Early Jurassic Period, about 193 million years ago. The first specimens were described in 1954, but it was not until over a decade later that the genus received its current name...
- Dimodosaurus – junior synonym of PlateosaurusPlateosaurusPlateosaurus is a genus of plateosaurid dinosaur that lived during the Late Triassic period, around 216 to 199 million years ago, in what is now Central and Northern Europe. Plateosaurus is a basal sauropodomorph dinosaur, a so-called "prosauropod"...
- DinheirosaurusDinheirosaurusDinheirosaurus is a genus of diplodocid sauropod dinosaur. It has been found in the upper section of the Late Jurassic strata of the Camadas de Alcobaça Formation located in central-western Portugal at Porto Dinheiro, Lourinhã...
- DinodocusDinodocusDinodocus is the name of a genus of sauropod dinosaur, named by Richard Owen in 1884. The name is now usually considered a nomen dubium. The only species, D...
- "Dinosaurus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now a junior synonym of PlateosaurusPlateosaurusPlateosaurus is a genus of plateosaurid dinosaur that lived during the Late Triassic period, around 216 to 199 million years ago, in what is now Central and Northern Europe. Plateosaurus is a basal sauropodomorph dinosaur, a so-called "prosauropod"... - Dinotyrannus – junior synonym of TyrannosaurusTyrannosaurusTyrannosaurus meaning "tyrant," and sauros meaning "lizard") is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex , commonly abbreviated to T. rex, is a fixture in popular culture. It lived throughout what is now western North America, with a much wider range than other...
- DiplodocusDiplodocusDiplodocus , or )is a genus of diplodocid sauropod dinosaur whose fossils were first discovered in 1877 by S. W. Williston. The generic name, coined by Othniel Charles Marsh in 1878, is a Neo-Latin term derived from Greek "double" and "beam", in reference to its double-beamed chevron bones...
- DiplotomodonDiplotomodonDiplotomodon is a dubious genus of dinosaur from New Jersey. It is only known from a single tooth found in either the Navesink or Hornerstown Formation, dating to the Maastrichtian age of the late Cretaceous period...
- Diracodon – junior synonym of StegosaurusStegosaurusStegosaurus is a genus of armored stegosaurid dinosaur. They lived during the Late Jurassic period , some 155 to 150 million years ago in what is now western North America. In 2006, a specimen of Stegosaurus was announced from Portugal, showing that they were present in Europe as well...
- DolichosuchusDolichosuchusDolichosuchus is the name given to a genus of dinosaur from the Triassic. It was originally classified in the disused family Hallopodidae, but has been reclassified as a coelophysoid. A single fossil was found in Germany. Since only one bone was discovered, the genus is considered a nomen dubium...
- DollodonDollodonDollodon is a genus of ornithopod dinosaur that lived in the Barremian and possibly the early Aptian ages of the Early Cretaceous Period of Europe. Its remains are known from Belgium , England and possibly Germany...
- "DomeykosaurusDomeykosaurus"Domeykosaurus" is the informal name given to an undescribed genus of dinosaur from the Late Cretaceous. It was a sauropod, more specifically a titanosaur. Its fossils were found in Chile by paleontologists David Rubilar and Alexander Vargas in 2003...
" – nomen nudum - DongbeititanDongbeititanDongbeititan is a genus of sauropod dinosaur from the Early Cretaceous-age Yixian Formation of Beipiao, Liaoning, China. It is based on holotype DNHM D2867, a partial postcranial skeleton including bones from the limbs, shoulder and pelvic girdles, and vertebrae...
- DongyangosaurusDongyangosaurusDongyangosaurus is a genus of titanosauriform sauropod dinosaur from the early Late Cretaceous of Zhejiang, China. The type species, described by Lu et al. in 2008, is D. sinensis. Like other sauropods, Dongyangosaurus would have been a large quadrupedal herbivore....
- DoratodonDoratodonDoratodon is an extinct genus of crocodylomorph that was once believed to be a dinosaur.- Species :The type species is D. carcharidens from the Late Cretaceous of Austria, whilst the second known species is D. ibericus from the Late Cretaceous of Spain.-References:*Company, J., Suberbiola, X.P.,...
– actually a crocodiliaCrocodiliaCrocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
n - Doryphorosaurus – junior synonym (unneeded replacement name) of KentrosaurusKentrosaurusKentrosaurus is a genus of stegosaurid dinosaur from the Late Jurassic of Tanzania. Its fossils have been found only in the Tendaguru Formation of Tanzania, dated to the Kimmeridgian stage, between about 155.7 ± 4 Ma and 150.8 ± 4 Ma . Apparently, all finds belong to one species, K...
- DraconyxDraconyxDraconyx is a genus of dinosaur from the Late Jurassic. It was an ornithopod which lived in what is now Portugal. It was found in Lourinhã, in 1991, and described by Octávio Mateus and Miguel Telles Antunes in 2001.-Etymology:...
- DracopeltaDracopeltaDracopelta was an ankylosaurian dinosaur from Portugal, described by Peter Galton in 1980. When Galton described the only known specimen, he referred it to the Kimmeridgian age of the locality of Ribamar...
- DracorexDracorexDracorex is a dinosaur genus of the family Pachycephalosauridae, from the Late Cretaceous of North America.The type species is Dracorex hogwartsia, meaning "dragon king of Hogwarts". It is known from one nearly complete skull , as well as four cervical vertebrae including the atlas, third, ninth...
– possibly a juvenile PachycephalosaurusPachycephalosaurusPachycephalosaurus is a genus of pachycephalosaurid dinosaur. It lived during the Late Cretaceous Period of what is now North America. Remains have been excavated in Montana, South Dakota, and Wyoming. It was an herbivorous or omnivorous creature which is only known from a single skull and a few... - DracovenatorDracovenatorDracovenator is the name of a genus of dinosaur from the Early Jurassic. It was a theropod which lived in what is now South Africa.The type species, Dracovenator regenti, was formally described by A.M. Yates in 2006. The genus name is a contraction of the Latin draco, "dragon", and venator, "hunter"...
- DravidosaurusDravidosaurusDravidosaurus is a genus of prehistoric reptile which was once thought to be the last surviving stegosaur, the group of "plated" dinosaurs. With an estimated length of 3 metres , it would have also been the smallest member of the group...
– actually a plesiosaurPlesiosaurPlesiosauroidea is an extinct clade of carnivorous plesiosaur marine reptiles. Plesiosauroids, are known from the Jurassic and Cretaceous Periods...
ian - DrinkerDrinkerDrinker was a genus of hypsilophodont dinosaur from the late Jurassic period of North America. Although based on good remains, it remains obscure due to a lack of post-naming publications.-Description:...
- DromaeosauroidesDromaeosauroidesDromaeosauroides is a genus of dromaeosaurid theropod dinosaur from the Early Cretaceous of Denmark.In the southwest of the island of Bornholm, layers of the Early Cretaceous Jydegaard Formation surface, dating to the late Berriasian age, about 140 million years ago and consisting of marine...
- DromaeosaurusDromaeosaurusDromaeosaurus was a genus of theropod dinosaur which lived during the Late Cretaceous period , sometime between 76.5 and 74.8 million years ago, in the western United States and Alberta, Canada. The name means 'running lizard'....
- Dromiceiomimus
- Dromicosaurus – junior synonym of MassospondylusMassospondylusMassospondylus and ) is a genus of prosauropod dinosaur from the early Jurassic Period . It was described by Sir Richard Owen in 1854 from remains found in South Africa, and is thus one of the first dinosaurs to have been named...
- DrusilasauraDrusilasauraDrusilasaura is an extinct genus of possible lognkosaurian titanosaur sauropod which lived during the late Cretaceous of Santa Cruz Province of southern Patagonia, Argentina....
- DryosaurusDryosaurusDryosaurus is a genus of an ornithopod dinosaur that lived in the Late Jurassic period. It was an iguanodont . Fossils have been found in the western United States, and were first discovered in the late 19th century...
- DryptosauroidesDryptosauroidesDryptosauroides is the name given to a genus of dinosaur from the Late Cretaceous. It was a large theropod possibly belonging to the Abelisauridae....
- DryptosaurusDryptosaurusDryptosaurus was a genus of primitive tyrannosaur that lived in Eastern North America during the middle Maastrichtian stage of the Late Cretaceous period. Although largely unknown now outside of academic circles, a famous painting of the genus by Charles R...
- DubreuillosaurusDubreuillosaurusDubreuillosaurus is a genus of carnivorous dinosaur from the middle Jurassic Period. It was a megalosaurid theropod. Its fossils were found in France....
- DuriatitanDuriatitanDuriatitan is a genus of titanosauriform sauropod dinosaur that lived in the Late Jurassic in what is now United Kingdom. The holotype specimen of Duriatitan, BMNH 44635, is a partial left upper arm bone which was found by R.I. Smith near Sandsfoot in the lower Kimmeridge Clay from Dorset,...
- DuriavenatorDuriavenatorDuriavenator is a genus of theropod dinosaur described in 2008 by Roger Benson. The type species is D. hesperis, formerly known as Megalosaurus hesperis. Duriavenator lived during the Bajocian stage, around 170 million years ago, making it one of the oldest-known tetanurans. The genus name combines...
- Dynamosaurus – junior synonym of TyrannosaurusTyrannosaurusTyrannosaurus meaning "tyrant," and sauros meaning "lizard") is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex , commonly abbreviated to T. rex, is a fixture in popular culture. It lived throughout what is now western North America, with a much wider range than other...
- DyoplosaurusDyoplosaurusDyoplosaurus is the name given to a genus of ankylosaurid dinosaur. It lived during the Late Cretaceous near what is now the Red Deer River in Alberta, Canada and was named by William Parks in 1924, based on holotype ROM 784, a partial skeleton including parts of the skull and lower jaws.The type...
- DysalotosaurusDysalotosaurusDysalotosaurus is a genus of herbivorous iguanodontian dinosaur. It was a dryosaurid iguanodontian, and its fossils have been found in late Kimmeridgian age-rocks of the Tendaguru Formation, Tanzania. The type species of Dysalotosaurus is D. lettowvorbecki. Dysalotosaurus was named by Virchow in...
– junior synonym of DryosaurusDryosaurusDryosaurus is a genus of an ornithopod dinosaur that lived in the Late Jurassic period. It was an iguanodont . Fossils have been found in the western United States, and were first discovered in the late 19th century... - DysganusDysganusDysganus is the name given to a dubious genus of dinosaur from the Late Cretaceous. It was a ceratopsian. Its fossils have been found in Montana....
- DyslocosaurusDyslocosaurusDyslocosaurus is the name given in 1992 to a genus of sauropod dinosaur, possibly from the Late Jurassic Period. Its fossils were found in North America....
- DystrophaeusDystrophaeusDystrophaeus is the name given to an extinct genus of dinosaur from the early Kimmeridgian stage of the Late Jurassic that existed around 155.7 Ma. It was perhaps a diplodocoid sauropod. Its fossils were found in the Morrison Formation of Utah....
- Dystylosaurus – junior synonym of SupersaurusSupersaurusSupersaurus is a genus of diplodocid sauropod dinosaur discovered by Vivian Jones of Delta, Colorado, in the Upper Jurassic Morrison Formation of Colorado in 1972. The fossil remains came from the Brushy Basin Member of the formation, dating to about 153 million years ago...
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- EchinodonEchinodonEchinodon meaning "hedgehog tooth" in reference to the spines on its teeth , occasionally known as Saurechinodon, is a genus of small European dinosaur of the early Cretaceous Period , 140 million years ago.-Discovery and species:The type specimen was discovered by Samuel Beckles in the Purbeck...
- EdmarkaEdmarkaEdmarka is a genus of dinosaur from the Late Jurassic of North America. The name honors scientist Bill Edmark. It was a theropod closely related to Torvosaurus, and may, in fact, be a junior synonym of that genus. Its fossils, including a partial skeleton, were found at Como Bluff, Wyoming.The...
- EdmontoniaEdmontoniaEdmontonia was an armoured dinosaur, a part of the nodosaur family from the Late Cretaceous Period. It is named after the Edmonton Formation , the unit of rock it was found in.-Description:...
- EdmontosaurusEdmontosaurusEdmontosaurus is a genus of crestless hadrosaurid dinosaur. It contains two species: Edmontosaurus regalis and Edmontosaurus annectens. Fossils of E. regalis have been found in rocks of western North America that date from the late Campanian stage of the Cretaceous Period 73 million years ago,...
- EfraasiaEfraasiaEfraasia is a genus of basal sauropodomorph dinosaur. It was a herbivore which lived during the middle Norian stage of the Late Triassic, around 210 million years ago, in what is now Germany...
- EiniosaurusEiniosaurusEiniosaurus is a medium-sized centrosaurine ceratopsian from the Upper Cretaceous of northwestern Montana. The name means 'buffalo lizard', in a combination of Blackfeet Indian and Latinized Ancient Greek; the specific name Einiosaurus is a medium-sized centrosaurine (“short-frilled”)...
- EkrixinatosaurusEkrixinatosaurusEkrixinatosaurus is a genus of dinosaur which lived during the Late Cretaceous. It was a theropod believed to be one of the abelisaurs. Its fossils have been found in Argentina...
- ElachistosuchusElachistosuchusElachistosuchus is a genus of archosaur from the Late Triassic. It was a prehistoric reptile which lived during the time of the earliest dinosaurs. Its fossils were found in Germany. The type species is E. huenei, described by German paleontologist Werner Janensch in 1949...
– a rhynchocephalianSphenodontiaSphenodontia is an order of lizard-like reptiles that includes only one living genus, the tuatara , and only two living species... - ElaphrosaurusElaphrosaurusElaphrosaurus is a genus of theropod dinosaur from the Kimmeridgian stage of the Late Jurassic of Tanzania. Elaphrosaurus was probably a ceratosaur about 6 meters long. Suggestions that it is a late surviving coelophysoid have been entertained but are generally dismissed. It was first...
- ElmisaurusElmisaurusElmisaurus is an extinct genus of dinosaur from the Late Cretaceous. It was a theropod belonging to the Oviraptorosauria. Its fossils have been found in Asia and North America. It is known from only its feet and hands....
- ElopteryxElopteryxElopteryx is a genus of troodontid maniraptoran theropod dinosaur based on fragmentary fossils found in late Cretaceous Period rocks of Romania. These fossils date from the early-mid Maastrichtian faunal stage, c.71-68 million years ago...
- Elosaurus – junior synonym of ApatosaurusApatosaurusApatosaurus , also known by the popular but scientifically deprecated synonym Brontosaurus, is a genus of sauropod dinosaur that lived from about 154 to 150 million years ago, during the Jurassic Period . It was one of the largest land animals that ever existed, with an average length of and a...
- ElrhazosaurusElrhazosaurusElrhazosaurus is a genus of basal iguanodontian dinosaur, known from isolated bones found in Lower Cretaceous rocks of Niger. These bones were initially thought to belong to a species of the related dryosaurid Valdosaurus, but have since been reclassified.-Discovery and history:Elrhazosaurus is...
- "Elvisaurus" – nomen nudum; CryolophosaurusCryolophosaurusCryolophosaurus was a large theropod dinosaur, with a crest on its head that looked like a Spanish comb. Due to the resemblance of this feature to Elvis Presley's pompadour haircut from the 1950s, this dinosaur was at one point informally known as "Elvisaurus".Cryolophosaurus was excavated from...
- EmausaurusEmausaurusEmausaurus is a genus of thyreophoran or armored dinosaur from the Early Jurassic. Its fossils have been found in Germany. It is known from a skull and partial postcranial remains, although only the skull is known well. Armor includes conical scutes and tall, spiny elements.The type species,...
- EmbasaurusEmbasaurusEmbasaurus is a genus of theropod dinosaur from the Early Cretaceous period. Fossils have been found in Kazakhstan in central Asia. As it is known only from two fragmentary vertebrae, Embasaurus is considered a nomen dubium, taxonomic placeholder lacking sufficient evidence to establish the...
- Empaterias – misspelling of EpanteriasEpanteriasEpanterias is a dubious genus of theropod dinosaur from the Kimmeridgian-Tithonian-age Upper Jurassic upper Morrison Formation of Garden Park, Colorado. It was described by Edward Drinker Cope in 1878. The type species is Epanterias amplexus. This genus is based on what is now AMNH 5767, parts of...
- EnigmosaurusEnigmosaurusEnigmosaurus is a genus of therizinosauroid theropod dinosaur from the Late Cretaceous of Mongolia, central Asia...
- EobrontosaurusEobrontosaurusEobrontosaurus is the name given to a genus of dinosaur from the Late Jurassic of North America. It was a sauropod probably closely related to Apatosaurus. It is known from a single site from the lower Morrison Formation, dating to about 154 million years ago. It grew up to long.The type species, E...
- EocarchariaEocarchariaEocarcharia is a genus of carcharodontosaurid theropod dinosaur from the Early Cretaceous Elrhaz Formation that lived in the Sahara 112 million years ago, in what today is the country of Niger. It was discovered in 2000 on an expedition led by University of Chicago paleontologist Paul Sereno. The...
- Eoceratops – junior synonym of ChasmosaurusChasmosaurusChasmosaurus is a genus of ceratopsid dinosaur from the Upper Cretaceous Period of North America. Its name means 'opening lizard', referring to the large openings in its frill . With a length of and a weight of , Chasmosaurus was a ceratopsian of average size...
- EocursorEocursorEocursor was a primitive genus of dinosaur which lived during the Late Triassic , around 210 million years ago. It was an ornithischian which lived in what is now South Africa...
- EodromaeusEodromaeusEodromaeus is an extinct genus of basal theropod dinosaur known from the Late Triassic period of Argentina. It has been cited by Sereno as resembling a supposed common ancestor to all dinosaurs, the "Eve" of the dinosaurs....
- "Eohadrosaurus" – nomen nudum; EolambiaEolambiaEolambia is a genus of herbivorous iguanodontian dinosaur from the mid-Cretaceous Period of the USA.In 1992 Carole Jones and her husband Ramal Jones near Castle Dale in Emery County, Utah, on the San Rafael Swell Anticline discovered a fossil site which would be named the Carol Quarry in her honour...
- EolambiaEolambiaEolambia is a genus of herbivorous iguanodontian dinosaur from the mid-Cretaceous Period of the USA.In 1992 Carole Jones and her husband Ramal Jones near Castle Dale in Emery County, Utah, on the San Rafael Swell Anticline discovered a fossil site which would be named the Carol Quarry in her honour...
- Eolosaurus – junior synonym of AeolosaurusAeolosaurusAeolosaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous Period of what is now South America. Like most sauropods, it would have been a quadrupedal herbivore with a long neck and tail...
- EomamenchisaurusEomamenchisaurusEomamenchisaurus is a genus of mamenchisaurid sauropod dinosaur from the Middle Jurassic of Yuanmou, Yunnan, China. The type species is E. yuanmouensis, described by Lu et al. in 2008....
- EoraptorEoraptorEoraptor was one of the world's earliest dinosaurs. It was a two-legged saurischian, close to the ancestry of theropods and sauropodomorphs. It lived ca. 231.4 million years ago, in what is now the northwestern region of Argentina...
- EotriceratopsEotriceratopsEotriceratops is a genus of ceratopsian dinosaur which lived during the late Cretaceous period. Its fossils have been found in the uppermost Horseshoe Canyon Formation, dating to about 67.6 million years ago. Its skull is reported to have been around 3 metres long...
- EotyrannusEotyrannusEotyrannus was a genus of tyrannosauroid theropod dinosaur hailing from the Early Cretaceous Wessex Formation beds, included in Wealden Group, located in the southwest coast of the Isle of Wight, United Kingdom...
- EpachthosaurusEpachthosaurusEpachthosaurus was a genus of dinosaur from the Late Cretaceous. It was a titanosaurid sauropod. Its fossils have been found in Central and Northern Patagonia in South America....
- EpanteriasEpanteriasEpanterias is a dubious genus of theropod dinosaur from the Kimmeridgian-Tithonian-age Upper Jurassic upper Morrison Formation of Garden Park, Colorado. It was described by Edward Drinker Cope in 1878. The type species is Epanterias amplexus. This genus is based on what is now AMNH 5767, parts of...
– may be AllosaurusAllosaurusAllosaurus is a genus of large theropod dinosaur that lived 155 to 150 million years ago during the late Jurassic period . The name Allosaurus means "different lizard". It is derived from the Greek /allos and /sauros... - "Ephoenosaurus" – nomen nudum; MachimosaurusMachimosaurusMachimosaurus is an extinct genus of teleosaurid crocodyliform from the Late Jurassic and Early Cretaceous . The type species, Machimosaurus hugii, was found in France. Other fossils have been found in Austria, England, Germany, Portugal and Switzerland...
(a crocodiliaCrocodiliaCrocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
n) - EpicampodonAnkistrodonAnkistrodon is an extinct genus of archosaur first thought to be a dinosaur. It was later determined to be a proterosuchid archosauriform. The type species is A. indicus, described by prolific British zoologist Thomas Henry Huxley in 1865. One authority in the 1970s classified Ankistrodon as a...
– actually a proterosuchid archosauriform - EpichirostenotesEpichirostenotesEpichirostenotes is a genus of oviraptorosaurian dinosaur from the late Cretaceous. Epichirostenotes is known from an incomplete skeleton found in 1923 at the Horseshoe Canyon Formation, in strata dated to about 72 million years ago. It was first named by Robert M. Sullivan, Steven E. Jasinski and...
- Epidendrosaurus
- EpidexipteryxEpidexipteryxEpidexipteryx is a genus of small avialan dinosaur, known from one fossil specimen in the collection of the Institute of Vertebrate Paleontology and Paleoanthropology in Beijing. Epidexipteryx represents the earliest known example of ornamental feathers in the fossil record. The type specimen is...
- EquijubusEquijubusEquijubus, meaning "horse mane" after the area in which it was found, is a genus of herbivorous hadrosauroid dinosaur from the Early Cretaceous of northwestern China.-Discovery and naming:...
- ErectopusErectopusErectopus is an allosauroid theropod from the Lower Cretaceous of France.The material comprising the type series was discovered in the late 19th century from the Phosphate-bearing beds of La Penthèive at Louppy-le-Château in eastern France, which have also produced remains of plesiosaurs,...
- ErketuErketuErketu is the name given to a genus of dinosaur from the Early Cretaceous. It was a sauropod with an "extremely long neck". Its fossils were found in Mongolia....
- ErliansaurusErliansaurusErliansaurus is a genus of therizinosauroid theropod dinosaur from the Late Cretaceous of China.A fossil of Erliansaurus was found near Sanhangobi in Inner-Mongolia. The type species, Erliansaurus bellamanus, was described by Xu Xing, Zhang Xiaohong, Paul Sereno, Zhao Xijin, Kuang Xuewen, Han Jun...
- Erlicosaurus – misspelling of ErlikosaurusErlikosaurusErlikosaurus is a genus of herbivorous theropod dinosaur from the late Cretaceous Period, belonging to the Therizinosauridae. Its fossils, a skull and some post-cranial fragments, were found in the Bayan Shireh Formation of Mongolia, dating to around 90 million years ago.-Discovery and naming:The...
- ErlikosaurusErlikosaurusErlikosaurus is a genus of herbivorous theropod dinosaur from the late Cretaceous Period, belonging to the Therizinosauridae. Its fossils, a skull and some post-cranial fragments, were found in the Bayan Shireh Formation of Mongolia, dating to around 90 million years ago.-Discovery and naming:The...
- EshanosaurusEshanosaurusEshanosaurus is a possible genus of therizinosaurian dinosaur from the early Jurassic Period. It is known only from a partial lower jawbone. The fossil was found in China...
- "Euacanthus" – nomen nudum; junior synonym of PolacanthusPolacanthusPolacanthus, deriving its name from the Ancient Greek poly-/πολυ- "many" and acantha/ακανθα "thorn" or "prickle", was an early armored, spiked, plant-eating ankylosaur from the early Cretaceous period. Early depictions often gave it a very vague head as it was only known from the rear half of the...
- EucamerotusEucamerotusEucamerotus was a genus of sauropod dinosaur from the Barremian-age Lower Cretaceous Wessex Formation of the Isle of Wight, England. It is known from vertebral remains, and a partial skeleton has been referred, although this has not been accepted...
- Eucentrosaurus – junior synonym (unneeded replacement name) of CentrosaurusCentrosaurusCentrosaurus is a genus of herbivorous ceratopsian dinosaurs from the late Cretaceous of Canada. Their remains have been found in the Dinosaur Park Formation and uppermost Oldman Formation, dating from 76.5 to 75.5 million years ago....
- EucercosaurusEucercosaurusEucercosaurus is the name given to a genus of dinosaur from the Early Cretaceous. It was an ornithopod discovered in England and first described in 1879. The type species, Eucercosaurus tanyspondylus, was described by British paleontologist Harry Seeley in 1879...
– possibly AnoplosaurusAnoplosaurusAnoplosaurus is an extinct genus of nodosaurid dinosaur, from the late Albian-age Lower Cretaceous Cambridge Greensand of Cambridgeshire, England... - EucnemesaurusEucnemesaurusEucnemesaurus is a basal sauropodomorph dinosaur genus usually considered to be a synonym of Euskelosaurus. Recent study by Yates , however, indicates that it is valid and the same animal as putative "giant herrerasaurid" Aliwalia....
- EucoelophysisEucoelophysisEucoelophysis is a genus of dinosauriform from the Late Triassic period Chinle Formation of New Mexico...
– actually a non-dinosaurian dinosauromorph - "EugongbusaurusEugongbusaurus"Eugongbusaurus" is the informal name given to a genus of dinosaur that lived about 160 to 155 million years ago, in the Late Jurassic. It was either a hypsilophodont, or a less-derived ornithischian...
" – nomen nudum - EuhelopusEuhelopusEuhelopus is a genus of sauropod dinosaur that lived during the Early Cretaceous, between 130 and 112 million years ago . It lived in what is now Shandong Province in China. A large herbivore, it weighed approximately 15-20 tons and attained an adult length of 15m...
- EuoplocephalusEuoplocephalusEuoplocephalus was one of the largest genera of ankylosaurian dinosaurs, at about the size of a small elephant. It is also the ankylosaurian with the best fossil record, so its extensive spiked armor, low-slung body and great club-like tail are well documented.-Description:Among the...
- Eupodosaurus – a nothosaurNothosaurNothosaurs were Triassic marine sauropterygian reptiles that may have lived like seals of today, catching food in water but coming ashore on rocks and beaches. They averaged about in length, with a long body and tail. The feet were paddle-like, and are known to have been webbed in life, to help...
synonymous with LariosaurusLariosaurusLariosaurus is an extinct genus of nothosaur from the Triassic period of northern Italy. With a length of just , it was one of the smallest known nothosaurs... - "Eureodon" – nomen nudum; TenontosaurusTenontosaurusTenontosaurus is a genus of medium- to large-sized ornithopod dinosaur. The genus is known from the late Aptian to Albian ages of the middle Cretaceous period sediments of western North America, dating between 115 to 108 million years ago...
- EurolimnornisEurolimnornisEurolimnornis is the name given to a monotypic genus of fossil bird from the Early Cretaceous. E. corneti probably was a primitive, but essentially modern bird and may indeed be an early neognathe ancestral to the grebes, although the alternative theories that it was a theropod or pterosaur or a...
– possibly a birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from... - EuronychodonEuronychodonEuronychodon is the name given to a genus of coelurosaur dinosaur from the Late Cretaceous, described by Miguel Telles Antunes and Denise Sigogneau-Russell in 1991. It is similar to another coelurosaur, Paronychodon....
- EuropasaurusEuropasaurusEuropasaurus is a basal macronarian sauropod, a form of quadrupedal herbivorous dinosaur. It lived during the Late Jurassic of northern Germany, and has been identified as an example of insular dwarfism resulting from the isolation of a sauropod population on an island within the Lower Saxony...
- EuskelosaurusEuskelosaurusEuskelosaurus was a semi-bipedal dinosaur from the Late Triassic. It was a prosauropod that lived in the Late Triassic Period, in present-day South Africa, Lesotho, and Zimbabwe. It was first described by Thomas Henry Huxley in 1866 as Euskelesaurus brownii based on holotype BMNH R1625, limb and...
- EustreptospondylusEustreptospondylusEustreptospondylus is a genus of megalosaurid dinosaur, from the Callovian stage of the Middle Jurassic period in southern England, at a time when Europe was a series of scattered islands Eustreptospondylus ("well-curved vertebra", in reference to the arrangement of the spine in the original...
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- FabrosaurusFabrosaurusFabrosaurus ) was a genus of herbivorous dinosaur which lived during the Early Jurassic . As the only fossil known of it is a partial jawbone with three teeth, Fabrosaurus is a nomen dubium and may in fact be the same as Lesothosaurus.Fabrosaurus was around 1 meter long...
– possibly LesothosaurusLesothosaurusLesothosaurus is an herbivorous ornithischian dinosaur. It was named by paleontologist Peter Galton in 1978, the name meaning "lizard from Lesotho". The genus is monotypic, having only one valid species, Lesothosaurus diagnosticus, within the genus.... - FalcariusFalcariusFalcarius is a genus of therizinosaurian dinosaur found in east-central Utah, United States. Its name is derived from the word sickle , which scientists have used to describe its unwieldy clawed hands...
- "Fenestrosaurus" – nomen nudum; OviraptorOviraptorOviraptor is a genus of small Mongolian theropod dinosaur, first discovered by the paleontologist Roy Chapman Andrews, and first described by Henry Fairfield Osborn, in 1924...
- Ferganasaurus
- FerganocephaleFerganocephaleFerganocephale was possibly an early pachycephalosaurian dinosaur. It was from the Middle Jurassic of Kyrgyzstan.The type species, Ferganocephale adenticulatum, was first described by Averianov, Martin, and Bakirov in 2005, and is based solely on teeth from the Callovian. The holotype is ZIN PH...
- Frenguellisaurus – junior synonym of HerrerasaurusHerrerasaurusHerrerasaurus was one of the earliest dinosaurs. All known specimens of this carnivore have been discovered in rocks of late Ladinian age in northwestern Argentina...
- FruitadensFruitadensFruitadens is a genus of heterodontosaurid dinosaur. The name means "Fruita tooth", in reference to Fruita, Colorado , where its fossils were first found. It is known from partial skulls and skeletons from at least four individuals of differing biological ages, found in Tithonian rocks of the...
- FukuiraptorFukuiraptorFukuiraptor was a medium-sized carnivore of the Early Cretaceous that lived in what is now Japan. Scientists first thought it was a member of the Dromaeosauridae, but after studying the fossils they now believe it was related to Allosaurus in the family Neovenatoridae. The type specimen is the...
- FukuisaurusFukuisaurusFukuisaurus is a genus of herbivorous dinosaur from the Early Cretaceous. It was an ornithopod which lived in what is now Japan....
- FukuititanFukuititanFukuititan is a genus of titanosauriform sauropod dinosaur that lived in the Early Cretaceous in what is now Japan. It is known from FPDM-V8468, the associated partial skeleton of a single individual, recovered from the Kitadani Dinosaur Quarry of the Tetori Group, at Katsuyama City...
- FulengiaFulengiaFulengia is the name given to a genus of dinosaur from the Early Jurassic. It was a prosauropod or other basal sauropodomorph. Its fossils were found in China....
- FulgurotheriumFulgurotheriumFulgurotherium is the name given to a genus of dinosaur from the Early Cretaceous . It lived in what is now Australia.The type species, Fulgurotherium australe, was named by Friedrich von Huene in 1932...
- "Fusinasus" – nomen nudum; EotyrannusEotyrannusEotyrannus was a genus of tyrannosauroid theropod dinosaur hailing from the Early Cretaceous Wessex Formation beds, included in Wealden Group, located in the southwest coast of the Isle of Wight, United Kingdom...
- FusuisaurusFusuisaurusFusuisaurus is a genus of sauropod dinosaur from the Early Cretaceous of China....
- "FutabasaurusFutabasaurus (dinosaur)"Futabasaurus" is an informal name for a genus of theropod dinosaur from the Late Cretaceous of Japan, known only from a partial shin bone discovered in the Coniacian-age Ashizawa Formation of the Futaba Group. It was coined by David Lambert in 1990 as a conversion from the Japanese nickname...
" – nomen nudum; not to be confused with the formally-named plesiosaurPlesiosaurPlesiosauroidea is an extinct clade of carnivorous plesiosaur marine reptiles. Plesiosauroids, are known from the Jurassic and Cretaceous Periods...
FutabasaurusFutabasaurusFutabasaurus is a genus of plesiosaur from the Late Cretaceous of Fukushima, Japan. Described and named in 2006, it was assigned to the family Elasmosauridae. The length was about 7 m, and the weight was about 3~4 tons. Futabasaurus is the first elasmosaurid found in Japan. The type... - Futalognkosaurus
- "FutalongkosaurusFutalongkosaurusFutalognkosaurus is a genus of titanosaurian dinosaur. The herbivorous Futalognkosaurus lived approximately 87 million years ago in the Coniacian stage of the late Cretaceous Period...
" – variant spelling of Futalognkosaurus
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- "GadolosaurusGadolosaurus"Gadolosaurus" is the informal name given to a genus of ornithopod dinosaur from late Cretaceous-age rocks in Mongolia. Though the name was made public in 1979, it has never been formally described, and the name is considered a nomen nudum. The name "Gadolosaurus" first appeared in a book by...
" – nomen nudum - GalesaurusGalesaurusGalesaurus was a prehistoric mammal-like-reptile, incorrectly classified as a dinosaur by Sir Richard Owen in 1859. Notably, Galesaurus was mentioned in the first issue of Nature in 1869, where T. H. Huxley expressed confidence that it would eventually be shown to be a dinosaur...
– actually a therapsidTherapsidaTherapsida is a group of the most advanced synapsids, and include the ancestors of mammals. Many of the traits today seen as unique to mammals had their origin within early therapsids, including hair, lactation, and an erect posture. The earliest fossil attributed to Therapsida is believed to be... - GallimimusGallimimusGallimimus is a genus of ornithomimid theropod dinosaur from the late Cretaceous period Nemegt Formation of Mongolia. With individuals as long as , it was one of the largest ornithomimosaurs...
- Galtonia – actually a pseudosuchiaPseudosuchiaPseudosuchia is the name originally given to a group of prehistoric reptiles from the Triassic period. The name has been variously interpreted, and it is still sometimes, if infrequently, used in scientific literature today. A more commonly used name, Crurotarsi, is often substituted for...
n; possibly a junior synonym of RevueltosaurusRevueltosaurusRevueltosaurus is a genus of prehistoric crurotarsan from Late Triassic New Mexico and Arizona.According to William Parker, who discovered the partial skeleton, "we have pretty much erased the record of Triassic ornithischian dinosaurs from North America, Europe and worldwide, except for South... - GalveosaurusGalveosaurusGalveosaurus is an extinct genus of dinosaur from the Late Jurassic to Early Cretaceous periods. Its fossils were found in Galve, Spain, hence its generic name, "Galve lizard". The specific name honours the discoverer, José María Herrero....
- Galvesaurus – junior synonym of GalveosaurusGalveosaurusGalveosaurus is an extinct genus of dinosaur from the Late Jurassic to Early Cretaceous periods. Its fossils were found in Galve, Spain, hence its generic name, "Galve lizard". The specific name honours the discoverer, José María Herrero....
- "Gansutitan" - nomen nudum; DaxiatitanDaxiatitanDaxiatitan is a genus of titanosauriform dinosaur from the Lower Cretaceous of Lanzhou Basin, Gansu Province, northwestern China. It is known from fossils including several neck vertebrae, a shoulder blade, and a thigh bone....
- GargoyleosaurusGargoyleosaurusGargoyleosaurus is one of the earliest ankylosaurs known from reasonably complete fossil remains. Its skull measures in length, and its total body length is an estimated . It may have weighed as much as...
- GarudimimusGarudimimusGarudimimus is a basal ornithomimosaurian theropod dinosaur from the Upper Cretaceous of Mongolia.-Discovery and naming:...
- GasosaurusGasosaurusGasosaurus was a tetanuran dinosaur discovered in Dashanpu, China. The scientific name, meaning "Gas Lizard", honours the gasoline company that found the Dashanpu fossil quarry in Sichuan Province, now named as the Lower Shaximiao Formation. It had strong legs but short arms, and like most...
- GasparinisauraGasparinisauraGasparinisaura is a genus of ornithopod dinosaur from the Late Cretaceous. Its fossils were found in Argentina. The type species, Gasparinisaura cincosaltensis, was described in 1996 by Coria and Salgado. Originally classified as an iguanodont, recent research indicates it is more basal...
- GastoniaGastonia (dinosaur)Gastonia is a genus of nodosaurid dinosaur from the Early Cretaceous of North America, around 125 million years ago. Closely related to Polacanthus, it has a sacral shield and large shoulder spikes. It is also the first polacanthine dinosaur to have been mounted for display at the Denver Museum of...
- "Gavinosaurus" – nomen nudum; EotyrannusEotyrannusEotyrannus was a genus of tyrannosauroid theropod dinosaur hailing from the Early Cretaceous Wessex Formation beds, included in Wealden Group, located in the southwest coast of the Isle of Wight, United Kingdom...
- GeminiraptorGeminiraptorGeminiraptor is a genus of troodontid dinosaur. Geminiraptor lived during the lower Cretaceous period in what is now Utah, USA. It is known from CEUM 7319, a maxilla recovered from the lower Yellow Cat Member of the Cedar Mountain Formation, dating to at least the early Barremian stage...
- GenusaurusGenusaurusGenusaurus is a genus of dinosaur from the Early Cretaceous. Its fossils were found in France. Scientists have estimated the length of Genusaurus to have been 3 m and its weight 50 kg...
- GenyodectesGenyodectesGenyodectes is a genus of ceratosaurian theropod dinosaur from the Lower Cretaceous of South America. The holotype material was collected from the Cañadón Grande, Departamento Paso de Indios in the Chubut Province of Argentina and consists of an incomplete snout, including the premaxillae,...
- GeranosaurusGeranosaurusGeranosaurus is a genus of ornithischian dinosaur from the Early Jurassic. It is known only from a jaw bone and limb elements discovered in South Africa. Because of the limited remains, it is considered a nomen dubium...
- GiganotosaurusGiganotosaurusGiganotosaurus is a genus of carcharodontosaurid dinosaur that lived around 97 million years ago during the early Cenomanian stage of the Late Cretaceous Period. It included some of the largest known terrestrial carnivores, slightly larger than the largest Tyrannosaurus, but smaller than the...
- GigantoraptorGigantoraptorGigantoraptor is a genus of giant oviraptorosaurian theropod dinosaur that lived 70 million years ago during the late Cretaceous Period. It was discovered in 2005 in the Iren Dabasu Formation, Erlian basin, in Inner Mongolia.-Discovery and naming:...
- GigantosaurusGigantosaurusGigantosaurus is a poorly known sauropod dinosaur genus from England. The type species, Gigantosaurus megalonyx, was named and described by Harry Govier Seeley in 1869...
Seeley, 1869 - "GigantosaurusGigantosaurusGigantosaurus is a poorly known sauropod dinosaur genus from England. The type species, Gigantosaurus megalonyx, was named and described by Harry Govier Seeley in 1869...
" E. Fraas, 1908 – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as TornieriaTornieriaTornieria is a genus of diplodocid sauropod dinosaur from Late Jurassic of Tanzania. It has a convoluted taxonomic history.-Discovery and naming:...
, MalawisaurusMalawisaurusMalawisaurus was a genus of sauropod dinosaur . It lived in what is now Africa, specifically Malawi, during the Aptian age of the Early Cretaceous Period. It is one of the few titanosaurs for which skull material has been found.It was named by Louis L. Jacobs and colleagues, and was originally...
, and JanenschiaJanenschiaJanenschia was a large sauropod from Late Jurassic Africa , and therefore the earliest known titanosaur. Originally thought to be a species of the diplodocid Tornieria/Barosaurus , it was later found to be a distantly related titanosaur. So far, it is only known from Tanzania... - Gigantoscelus – junior synonym of EuskelosaurusEuskelosaurusEuskelosaurus was a semi-bipedal dinosaur from the Late Triassic. It was a prosauropod that lived in the Late Triassic Period, in present-day South Africa, Lesotho, and Zimbabwe. It was first described by Thomas Henry Huxley in 1866 as Euskelesaurus brownii based on holotype BMNH R1625, limb and...
- GigantspinosaurusGigantspinosaurusGigantspinosaurus is a genus of herbivorous ornithischian dinosaur from the Late Jurassic. It was a stegosaur found in Sichuan, China....
- GilmoreosaurusGilmoreosaurusGilmoreosaurus is the name given to a genus of dinosaur from the Cretaceous of Asia. The type species is Gilmoreosaurus mongoliensis. It is believed to be a hadrosaur or iguanodont from the Iren Dabasu Formation of Mongolia, dating to 70 Ma ago. Additional specimens have been described as distinct...
- "GinnareemimusGinnareemimusKinnareemimus is a genus of ornithomimosaurian theropod dinosaur from Thailand. It is known only from incomplete remains including vertebrae, partial pubic bones, metatarsals, and an incomplete fibula...
" – nomen nudum; Kinnareemimus - GiraffatitanGiraffatitanGiraffatitan, meaning "giraffe titan", is a genus of sauropod dinosaur that lived during the late Jurassic Period . It was originally named as an African species of Brachiosaurus...
- GlacialisaurusGlacialisaurusGlacialisaurus is a genus of massospondylid sauropodomorph dinosaur. It lived during the Early Jurassic period in what is now central Transantarctic Mountains of Antarctica. It is known from the holotype FMNH PR1823, a partial hind limb and from the referred material FMNH PR1822, a left...
- GlishadesGlishadesGlishades is a genus of hadrosauroid dinosaur that lived in the Late Cretaceous in North America. It is based on AMNH 27414, two partial premaxillae discovered in the Upper Cretaceous rocks of the Two Medicine Formation in Montana...
- GlyptodontopeltaGlyptodontopeltaGlyptodontopelta is a genus of dinosaur from the Late Cretaceous. It was an ankylosaur, an armored dinosaur....
- GobiceratopsGobiceratopsGobiceratops is a genus of ceratopsian dinosaur from the Upper Cretaceous of Mongolia. It is based on a skull that is 3.5 centimeters long, from the Khermin Tsav locality in the Barun Goyot Formation of southern Mongolia; the type individual was young. Gobiceratops is thought to have been...
- GobipteryxGobipteryxGobipteryx is the name given to a genus of enantiornithine bird from the Late Cretaceous Period. Its fossils were found in the Barun Goyot Formation in the Gobi Desert, Mongolia and first described in 1976 from two fragmentary skulls...
– actually an enantiornithine birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from... - GobisaurusGobisaurusGobisaurus is an extinct genus of basal ankylosaurid ankylosaur from the Upper Cretaceous Ulansuhai Formation of China. The holotype consists of a skull and as yet undescribed postcranial remains. It was first named by Matthew K. Vickaryous, Anthony P. Russell, Philip J...
- GobititanGobititanGobititan is a genus of dinosaur from the mid-Cretaceous. The genus is based on one partial skeleton, composed of spinal vertebrae and a partial limb. Based on the partial skeleton, it is believed to have been a basal titanosaur, a type of sauropod. The type species, Gobititan shenzhouensis, was...
- "Godzillasaurus" – nomen nudum; GojirasaurusGojirasaurusGojirasaurus is a dubious genus of dinosaur named after the giant monster movie character Gojira . It was discovered in the Bull Canyon Formation...
- GojirasaurusGojirasaurusGojirasaurus is a dubious genus of dinosaur named after the giant monster movie character Gojira . It was discovered in the Bull Canyon Formation...
- GondwanatitanGondwanatitanGondwanatitan was a titanosaurian sauropod dinosaur. Gondwanatitan was found in Brazil, at the time part of the southern supercontinent Gondwana , in the late Cretaceous Period . Like some other sauropods, Gondwanatitan was tall and ate tough shoots and leaves off of the tops of trees. G...
- GongbusaurusGongbusaurusGongbusaurus is a genus of ornithischian, perhaps ornithopod, dinosaur that lived between about 160 and 155 million years ago, in the Late Jurassic period. A small herbivore, it is very poorly known. Two species have been assigned to it, but as the original name is based on teeth, there is no...
- GongxianosaurusGongxianosaurusGongxianosaurus is a genus of dinosaur from the Early Jurassic Period. It was a sauropod or prosauropod from China.The type species, G. shibeiensis, was described by He, Wang, Lui, Zhou, Lui, Cai and Dai in 1998.-References:...
- GorgosaurusGorgosaurusGorgosaurus is a genus of tyrannosaurid theropod dinosaur that lived in western North America during the Late Cretaceous Period, between about 76.5 and 75 million years ago. Fossil remains have been found in the Canadian province of Alberta and possibly the U.S. state of Montana....
- GoyocephaleGoyocephaleGoyocephale is a genus of pachycephalosaurid dinosaur which lived during the Late Cretaceous period. It lived in what is now Mongolia.Goyocephale probably weighed 10–40 kg. The type species, Goyocephale lattimorei, was formally described by Perle, Maryañska, and Osmólka from an incomplete...
- GraciliceratopsGraciliceratopsGraciliceratops is a Ceratopsian dinosaur first described by paleontologist Paul Sereno in 2000. It is known from the Late Cretaceous period and its fossils were found in Mongolia...
- GraciliraptorGraciliraptorGraciliraptor is a genus of theropod dinosaur from the early Cretaceous Period. It is a microraptorine dromaeosaurid....
- GracilisuchusGracilisuchusGracilisuchus is an extinct genus of tiny crurotarsan from the Middle Triassic. It was a suchian close to the ancestry of crocodiles, and was at one time thought to be a dinosaur, but this hypothesis has since been rejected...
– actually a non-dinosaurian archosaurArchosaurArchosaurs are a group of diapsid amniotes whose living representatives consist of modern birds and crocodilians. This group also includes all extinct non-avian dinosaurs, many extinct crocodilian relatives, and pterosaurs. Archosauria, the archosaur clade, is a crown group that includes the most... - "Gravisaurus" – nomen nudum; LurdusaurusLurdusaurusLurdusaurus is a genus of large ornithopod dinosaur which lived in the Aptian stage of the Early Cretaceous, sometime between 121 to 112 million years ago.-Discovery and naming:...
- GravitholusGravitholusGravitholus was a genus of dinosaur from the late Cretaceous period . It was a pachycephalosaur, a type of dinosaur with a thick skull made of hardened bone. It lived in what is now Alberta, Canada, and was described in 1979 by W. P. Wall and Peter Galton.The type species is Gravitholus albertae...
- Gresslyosaurus – junior synonym of PlateosaurusPlateosaurusPlateosaurus is a genus of plateosaurid dinosaur that lived during the Late Triassic period, around 216 to 199 million years ago, in what is now Central and Northern Europe. Plateosaurus is a basal sauropodomorph dinosaur, a so-called "prosauropod"...
- Griphornis – junior synonym of the birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
ArchaeopteryxArchaeopteryxArchaeopteryx , sometimes referred to by its German name Urvogel , is a genus of theropod dinosaur that is closely related to birds. The name derives from the Ancient Greek meaning "ancient", and , meaning "feather" or "wing"... - Griphosaurus – junior synonym of the birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
ArchaeopteryxArchaeopteryxArchaeopteryx , sometimes referred to by its German name Urvogel , is a genus of theropod dinosaur that is closely related to birds. The name derives from the Ancient Greek meaning "ancient", and , meaning "feather" or "wing"... - "Gripposaurus" – nomen nudum; "Gyposaurus" sinensisGyposaurusGyposaurus is a genus of basal sauropodomorph dinosaur from the early Jurassic of South Africa and China...
- GryponyxGryponyxGryponyx is an extinct genus of massopod sauropodomorph known from southern Free State, central South Africa.-Description:...
- GryposaurusGryposaurusGryposaurus was a genus of duckbilled dinosaur that lived about 83 to 75.5 million years ago, in the Late Cretaceous of North America...
- GuaibasaurusGuaibasaurusGuaibasaurus is an extinct genus of basal dinosaur known from the Triassic of Rio Grande do Sul, southern Brazil.-Discovery:Guaibasaurus was originally named on the basis of the holotype, MCN PV2355, a well-preserved partial postcranial skeleton and the paratype, MCN PV2356, an...
- GuanlongGuanlongGuanlong was a genus of proceratosaurid tyrannosauroid dinosaur, one of the earliest known examples of the lineage.-Description and discovery:...
- GwyneddosaurusGwyneddosaurusGwyneddosaurus is an extinct genus of aquatic tanystropheid reptile. The type species, G. erici was described in 1945 by Wilhelm Bock, who identified it as a coelurosaurian dinosaur related to Podokesaurus...
– a tanystrophidTanystropheusTanystropheus , was a 6 metre long reptile that dated from the Middle Triassic period. It is recognisable by its extremely elongated neck, which measured 3 metres long - longer than its body and tail combined. Despite this length, it had only ten neck vertebrae, each quite long... - GyposaurusGyposaurusGyposaurus is a genus of basal sauropodomorph dinosaur from the early Jurassic of South Africa and China...
– junior synonym of MassospondylusMassospondylusMassospondylus and ) is a genus of prosauropod dinosaur from the early Jurassic Period . It was described by Sir Richard Owen in 1854 from remains found in South Africa, and is thus one of the first dinosaurs to have been named...
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- "Hadrosauravus" – nomen nudum; junior synonym of GryposaurusGryposaurusGryposaurus was a genus of duckbilled dinosaur that lived about 83 to 75.5 million years ago, in the Late Cretaceous of North America...
- HadrosaurusHadrosaurusHadrosaurus is a valid genus of hadrosaurid dinosaur. In 1858, a skeleton of a dinosaur from this genus was the first dinosaur skeleton known from more than isolated teeth to be found in North America. In 1868, it became the first ever mounted dinosaur skeleton...
- HagryphusHagryphusHagryphus is an oviraptorosaurian theropod dinosaur from the Upper Cretaceous Period of what is now Utah. To date, only a single species is known, H. giganteus...
- HallopusHallopusHallopus was a prehistoric reptile, classified by O. C. Marsh in 1881 as a dinosaur. In fact it was probably a crocodilian or possibly a more primitive crurotarsan, and may be closely related to Junggarsuchus ....
– actually a crocodiliaCrocodiliaCrocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
n - HalticosaurusHalticosaurusHalticosaurus is a genus of theropod dinosaur from the Late Triassic period . It was a coelophysoid found in the Middle Stubensandstein formation of what is present-day Germany...
- HanssuesiaHanssuesiaHanssuesia is a genus of pachycephalosaurid dinosaur from the late Cretaceous period. It lived in what is now Alberta and Montana.Hanssuesia based on material originally named Troodon sternbergi by Barnum Brown and Erich Maren Schlaikjer in 1943. Later, it was transferred to Stegoceras as S....
- "HanwulosaurusHanwulosaurus"Hanwulosaurus" is the informal name given to an as-yet undescribed genus of dinosaur from the Late Cretaceous. It was an ankylosaur around 9 meters long, which is long for an ankylosaur. Its fossils were found in Inner Mongolia, China...
" – nomen nudum - HaplocanthosaurusHaplocanthosaurusHaplocanthosaurus is a genus of sauropod dinosaur. Two species, H. delfsi and H. priscus, are known from incomplete fossil skeletons. It lived during the late Jurassic period , 155 to 152 million years ago. The type species is H. priscus, and the referred species H...
- "Haplocanthus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as HaplocanthosaurusHaplocanthosaurusHaplocanthosaurus is a genus of sauropod dinosaur. Two species, H. delfsi and H. priscus, are known from incomplete fossil skeletons. It lived during the late Jurassic period , 155 to 152 million years ago. The type species is H. priscus, and the referred species H... - HaplocheirusHaplocheirusHaplocheirus is a genus of alvarezsauroid theropod dinosaur. It is the most basal member of its clade. It is the oldest known alvarezsauroid, predating all other members by about 63 million years. This also makes it about 15 million years older than the oldest known bird Archaeopteryx...
- HarpymimusHarpymimusHarpymimus is a basal ornithomimosaurian theropod dinosaur from the Early Cretaceous Period of what is now Mongolia. Unlike later, more derived ornithomimosaurs, Harpymimus still possessed teeth, although they appear to have been restricted to the dentary of the lower jaw.-Discovery and naming:In...
- HayaHaya (dinosaur)Haya is an extinct genus of basal ornithopod dinosaur known from Mongolia.-Description:Haya is known from several well-preserved specimens which collected in the Khugenetslavkant locality by the joint Mongolian Academy of Sciences from 2002 to 2007, from the Javkhlant Formation. The locality...
- Hecatasaurus – junior synonym of TelmatosaurusTelmatosaurusTelmatosaurus is a genus of basal hadrosaurid dinosaur from the Late Cretaceous. It was a relatively small hadrosaur, approximately five meters long, found in what is now Romania....
- "HeilongjiangosaurusHeilongjiangosaurus"Heilongjiangosaurus" is the informal name given to an as-yet undescribed genus of duckbilled dinosaur from the Late Cretaceous. It possibly was a lambeosaurine, and may in fact be the same animal as Charonosaurus. The fossils were found in Maastrichtian-age rocks in Heilongjiang, China...
" – nomen nudum - HeishansaurusHeishansaurusHeishansaurus, meaning "Heishan lizard" after the area in China where it was discovered, is the name given to a dubious genus of dinosaur. First described in 1953 as a pachycephalosaur, this dinosaur may actually be an ankylosaur. The fossils, dating from the Late Cretaceous , are fragmentary, and...
- HelioceratopsHelioceratopsHelioceratops is a genus of neoceratopsian dinosaur from the Middle Cretaceous of China. The type species is H. brachygnathus, described in 2009 by a group of paleontologists led by Jin Liyong. Helioceratops was discovered in the Quantou Formation of China's eastern Jilin province and is known...
- "HelopusHelopusHelopus from the Ancient Greek meaning "marsh foot" can refer to three types of living organism:* A sauropod dinosaur, now known as Euhelopus* Helopus, a genus of bird* Helopus, a genus of grass...
" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as EuhelopusEuhelopusEuhelopus is a genus of sauropod dinosaur that lived during the Early Cretaceous, between 130 and 112 million years ago . It lived in what is now Shandong Province in China. A large herbivore, it weighed approximately 15-20 tons and attained an adult length of 15m... - HeptasteornisHeptasteornisHeptasteornis is the name given to a dubious genus of small dinosaur from the Late Cretaceous. The type species is Heptasteornis andrewsi, described as a presumed gigantic prehistoric owl in 1975...
- HerbstosaurusHerbstosaurusHerbstosaurus is the name given to a genus of pterosaur that lived during the Jurassic period, in what is now Argentina.In 1969 Argentine paleobotanist Rafael Herbst in the province Neuquén at Picun Leufú dug up a piece of sandstone holding a number of disarticulated bones of a small reptile...
– actually a pterosaurPterosaurPterosaurs were flying reptiles of the clade or order Pterosauria. They existed from the late Triassic to the end of the Cretaceous Period . Pterosaurs are the earliest vertebrates known to have evolved powered flight... - HerrerasaurusHerrerasaurusHerrerasaurus was one of the earliest dinosaurs. All known specimens of this carnivore have been discovered in rocks of late Ladinian age in northwestern Argentina...
- HesperonychusHesperonychusHesperonychus was a genus of small, carnivorous dromaeosaurid dinosaur. There is one described species, Hesperonychus elizabethae; the type species was named in honor of the woman who collected it in 1982...
- HesperosaurusHesperosaurusHesperosaurus was a herbivorous dinosaur from the Kimmeridgian to Tithonian epochs of the Jurassic period , whose fossils are found in the state of Wyoming in the United States of America...
- HeterodontosaurusHeterodontosaurusHeterodontosaurus is a genus of small herbivorous dinosaur with prominent canine teeth which lived in the Early Jurassic of South Africa. It was similar to a hypsilophodont in shape, and ate plants, despite its canines.Heterodontosaurus is currently known from specimens of the SAFM from South...
- Heterosaurus – junior synonym of IguanodonIguanodonIguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedal hypsilophodontids and the ornithopods' culmination in the duck-billed dinosaurs...
- HexinlusaurusHexinlusaurusHexinlusaurus is a genus of basal ornithischian dinosaur from the Middle Jurassic of China. The holotype , consists of an almost complete, articulated skull and some postcranial material, collected from a terrestrial sandstone within the Lower Shaximiao Formation at the famous dinosaur-bearing...
- HeyuanniaHeyuanniaHeyuannia is a genus of oviraptorid dinosaur that lived during the Late Cretaceous Period in China. It was the first oviraptorid found in that country; most others were found in neighbouring Mongolia....
- Hierosaurus – junior synonym of NodosaurusNodosaurusNodosaurus was a genus of herbivorous ankylosaurian dinosaur from the Late Cretaceous, the fossils of which are found in North America. Two incomplete specimens have been discovered in Wyoming and Kansas, and no skulls...
- Hikanodon – junior synonym of IguanodonIguanodonIguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedal hypsilophodontids and the ornithopods' culmination in the duck-billed dinosaurs...
- HippodracoHippodracoHippodraco is a genus of herbivorous iguanodontian dinosaur. It is a basal iguanodontian which lived during the Lower Cretaceous period in what is now Utah, USA...
- "HironosaurusHironosaurus"Hironosaurus" is the informal name given to an as-yet undescribed genus of dinosaur from the Late Cretaceous. Found in Hirono, Fukushima, Japan, it was probably a type of hadrosaur, although no subfamily identification has been made. The fossils are quite fragmentary, and consist of teeth and a...
" – nomen nudum - "HisanohamasaurusHisanohamasaurus"Hisanohamasaurus" is the informal name given to an as yet undescribed genus of dinosaur from the Late Cretaceous. It is a nomen nudum known only from teeth that first appeared in a general-audience dinosaur book by David Lambert in 1990...
" – nomen nudum - HistriasaurusHistriasaurusHistriasaurus was a genus of dinosaur from the Early Cretaceous . Its fossils, holotype WN V-6, were found in Croatia, and described in 1998 by Dalla Vecchia. It was a diplodocoid sauropod, related to, but more primitive than, Rebbachisaurus...
- HomalocephaleHomalocephaleHomalocephale is a genus of dinosaur belonging to the pachycephalosaurid family, which lived during the late Cretaceous period of what is now Mongolia, 80 million years ago. The genus was described in 1974 by Osmólska & Maryañska, and consists of a single species, H...
- "Honghesaurus" – nomen nudum; YandusaurusYandusaurusYandusaurus is a genus of herbivorous basal euornithopod dinosaur from the Bathonian age of China.-Discovery and naming:...
- HongshanosaurusHongshanosaurusHongshanosaurus is a genus of psittacosaurid ceratopsian dinosaur from the Early Cretaceous Period of eastern Asia. Although two skulls are the only fossil material described, comparisons with close relatives suggest it was a small, bipedal herbivore with a bony beak on the end of both upper and...
- HoplitosaurusHoplitosaurusHoplitosaurus was a genus of armored dinosaur related to Polacanthus. It was named from a partial skeleton found in the ?Barremian-age Lower Cretaceous Lakota Formation of Custer County, South Dakota. It is an obscure genus which has been subject to some misinterpretation of its damaged remains...
- Hoplosaurus – junior synonym of StruthiosaurusStruthiosaurusStruthiosaurus is one of the smallest known and most basal genera of nodosaurid dinosaurs, from the Late Cretaceous period of Austria, Romania and France in Europe. It was protected by body armour...
- Hortalotarsus – junior synonym of MassospondylusMassospondylusMassospondylus and ) is a genus of prosauropod dinosaur from the early Jurassic Period . It was described by Sir Richard Owen in 1854 from remains found in South Africa, and is thus one of the first dinosaurs to have been named...
- HuabeisaurusHuabeisaurusHuabeisaurus was a genus of dinosaur from the Late Cretaceous . It was a sauropod which lived in what is present-day northern China. The type species, Huabeisaurus allocotus, was first described by Pang and Cheng in 2000. The dinosaur closely resembles Opisthocoelicaudia, and was a quadrupal...
- HuanghetitanHuanghetitanHuanghetitan , is a genus of sauropod dinosaur from the early Cretaceous Period. It was a basal titanosauriform which lived in what is now Gansu, China....
- HuaxiagnathusHuaxiagnathusHuaxiagnathus is a genus of theropod dinosaur from the Lower Cretaceous of China. It was a compsognathid, large for that group at about half a meter longer than Compsognathus and larger specimens of Sinosauropteryx, with the largest specimen about 1.8 meters in length.The name Huaxiagnathus is...
- "Huaxiasaurus" – nomen nudum; HuaxiagnathusHuaxiagnathusHuaxiagnathus is a genus of theropod dinosaur from the Lower Cretaceous of China. It was a compsognathid, large for that group at about half a meter longer than Compsognathus and larger specimens of Sinosauropteryx, with the largest specimen about 1.8 meters in length.The name Huaxiagnathus is...
- HuayangosaurusHuayangosaurusHuayangosaurus is a genus of stegosaurian dinosaur from the Middle Jurassic of China. The name derives from "Huayang", an alternate name for Sichuan , and "saurus", meaning "lizard"...
- HudiesaurusHudiesaurusHudiesaurus is a genus of dinosaur from China. A sauropod, it may have been related to Mamenchisaurus. Its fossil remains were found in the Kalazha Formation, which dates to the late Jurassic Period. The type species, Hudiesaurus sinojapanorum, is known from only two incomplete specimens...
- HulsanpesHulsanpesHulsanpes is the name given to a monotypic genus of theropods, sometimes considered a primitive bird. First described as a dromaeosaur, it lived during the Late Cretaceous. Its fossil remains were found in the Campanian Barun Goyot Formation at Khulsan, Ömnögovi Province, Mongolia...
– possibly a birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from... - HungarosaurusHungarosaurusHungarosaurus tormai is a nodosaurid ankylosaur from the Upper Cretaceous Csehbánya Formation of the Bakony Mountains of western Hungary. It is presently the most completely known ankylosaur from the Cretaceous of Europe...
- HylaeosaurusHylaeosaurusHylaeosaurus is the most obscure of the three animals used by Sir Richard Owen to first define the new group Dinosauria, in 1842. The original specimen, recovered by Gideon Mantell from the Tilgate Forest in the south of England in 1832, now resides in the Natural History Museum of London, where...
- Hylosaurus – junior synonym of HylaeosaurusHylaeosaurusHylaeosaurus is the most obscure of the three animals used by Sir Richard Owen to first define the new group Dinosauria, in 1842. The original specimen, recovered by Gideon Mantell from the Tilgate Forest in the south of England in 1832, now resides in the Natural History Museum of London, where...
- HypacrosaurusHypacrosaurusHypacrosaurus was a genus of duckbill dinosaur similar in appearance to Corythosaurus. Like Corythosaurus, it had a tall, hollow rounded crest, although not as large and straight...
- "HypselorhachisHypselorhachisHypselorhachis is a genus of extinct reptile, possibly a ctenosauriscid archosaur related to Ctenosauriscus. It lived during the Triassic Period. It is currently known only from a single vertebra found from the Middle Triassic Manda Beds in Tanzania....
" – nomen nudum - HypselosaurusHypselosaurusHypselosaurus was a long titanosaurid sauropod that lived in Europe during the Late Cretaceous Period .Hypselosaurus was scientifically described by geologist Pierre Émile Philippe Matheron in 1846 and formally named in...
- HypselospinusHypselospinusHypselospinus is a genus of iguanodontian dinosaur which was first described as a species of Iguanodon by Richard Lydekker in 1889, the specific name honouring William Henry Fitton....
- HypsibemaHypsibemaHypsibema is a little-known genus of dinosaur from the Late Cretaceous . Its giant fossils were found in the U.S. states of North Carolina and Missouri...
- HypsilophodonHypsilophodonHypsilophodon is an ornithopod dinosaur genus from the Early Cretaceous period of Europe. It was a small bipedal animal with an herbivorous or possibly omnivorous diet...
- Hypsirophus – probable junior synonym of StegosaurusStegosaurusStegosaurus is a genus of armored stegosaurid dinosaur. They lived during the Late Jurassic period , some 155 to 150 million years ago in what is now western North America. In 2006, a specimen of Stegosaurus was announced from Portugal, showing that they were present in Europe as well...
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- "Ichabodcraniosaurus" – nomen nudum; probably VelociraptorVelociraptorVelociraptor is a genus of dromaeosaurid theropod dinosaur that existed approximately 75 to 71 million years ago during the later part of the Cretaceous Period. Two species are currently recognized, although others have been assigned in the past. The type species is V. mongoliensis; fossils...
- IgnavusaurusIgnavusaurusIgnavusaurus is a genus of basal sauropodomorph dinosaur that lived during the Early Jurassic in what is now present-day Lesotho. Its fossils were found in the upper Elliot Formation which is probably Hettangian in age. It was described on the basis of a partial, well preserved articulated skeleton...
- IguanacolossusIguanacolossusIguanacolossus is a genus of herbivorous iguanodontian dinosaur. It is a basal iguanodontian which lived during the lower Cretaceous period in what is now Utah, USA...
- IguanodonIguanodonIguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedal hypsilophodontids and the ornithopods' culmination in the duck-billed dinosaurs...
- "Iguanoides" – nomen nudum; IguanodonIguanodonIguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedal hypsilophodontids and the ornithopods' culmination in the duck-billed dinosaurs...
- "Iguanosaurus" – nomen nudum; IguanodonIguanodonIguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedal hypsilophodontids and the ornithopods' culmination in the duck-billed dinosaurs...
- IliosuchusIliosuchusIliosuchus is a genus of theropod dinosaur known from Bathonian–age rocks of England. It was perhaps long....
- IlokelesiaIlokelesiaIlokelesia is a primitive abelisaur found in 1991, preserved in the layers of the earliest Late Cretaceous of the Río Limay Formation, Neuquén Group, located near Plaza Huincul, Neuquén Province, Argentina. The specimen, consisting of very fragmentary elements of the skull, the axial and the...
- IncisivosaurusIncisivosaurusIncisivosaurus is a genus of small, probably herbivorous theropod dinosaur from the early Cretaceous Period of what is now the People's Republic of China...
- IndosaurusIndosaurusIndosaurus is a genus of theropod dinosaur once living in what is now India. It lived approximately 69 million years ago, in the Maastrichtian division of the Late Cretaceous...
- IndosuchusIndosuchusIndosuchus is a genus of abelisaurid dinosaur from the Late Cretaceous Period , a theropod related to Abelisaurus. Like most theropods, Indosuchus was a bipedal carnivore...
- "IngeniaIngenia"Ingenia" is a genus of oviraptorid theropod dinosaurs, with one known species, "Ingenia" yanshini. Fossils have been found in several Late Cretaceous-age formations of Mongolia, most prominently in the Bugin Tsav beds of the Nemegt Formation, which has also yielded the holotype of Mononykus...
" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, has not yet been renamed - InosaurusInosaurusInosaurus is the name given to a dubious genus of dinosaur from the Early Cretaceous. Only partial fossils have ever been found.The type species is Inosaurus tedreftensis, described by Albert-Félix de Lapparent in 1960. The specific name is derived from the location of the site, In Tedreft...
- IrritatorIrritatorIrritator is a genus of spinosaurid dinosaur that lived in the early Cretaceous Period , around 110 million years ago. Current estimations indicate a length of 8 meters . It was found in Brazil...
- IsanosaurusIsanosaurusIsanosaurus was one of the first true sauropod dinosaurs, with all four legs always on the ground. It lived 210 million years ago in Thailand. The type species is Isanosaurus attavipachi...
- Ischisaurus – junior synonym of HerrerasaurusHerrerasaurusHerrerasaurus was one of the earliest dinosaurs. All known specimens of this carnivore have been discovered in rocks of late Ladinian age in northwestern Argentina...
- "IschyrosaurusIschyrosaurus"Ischyrosaurus" was a genus of sauropod dinosaur from the Kimmeridgian-age Upper Jurassic Kimmeridge Clay of Dorset, Cambridgeshire, England...
" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, has not yet been renamed - IsisaurusIsisaurusIsisaurus is a genus of dinosaur from the Late Cretaceous Period. Isisaurus was a sauropod , which lived in what is now India....
- "Issasaurus" – nomen nudum; DicraeosaurusDicraeosaurusDicraeosaurus is a genus of small diplodocoid sauropod dinosaur. It was named for the spines on the back of the neck. The first fossil was described by paleontologist Werner Janensch in 1914.Unlike most diplodocoids, Dicraeosaurus had a large head with a relatively short and wide neck...
- ItemirusItemirusItemirus is a genus of theropod dinosaur from the Turonian age of the Late Cretaceous period of Uzbekistan.Itemirus is known from a single small damaged fossil braincase or neurocranium, in 1958 found near the village of Itemir at the Dzharakuduk escarpment in layers of the Bissekty Formation.This...
- IuticosaurusIuticosaurusIuticosaurus is the name given to a genus of dinosaur from the Early Cretaceous of the Isle of Wight. Iuticosaurus was a sauropod, specifically a titanosaur....
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- JainosaurusJainosaurusJainosaurus is a large titanosaurian dinosaur of India and wider Asia, which lived in the Maastrichtian ....
- JaklapallisaurusJaklapallisaurusJaklapallisaurus is a genus of herbivore plateosaurian sauropodomorph dinosaur. It is a plateosaurid which lived during the Late Triassic period in what is now Andhra Pradesh, central India...
- JanenschiaJanenschiaJanenschia was a large sauropod from Late Jurassic Africa , and therefore the earliest known titanosaur. Originally thought to be a species of the diplodocid Tornieria/Barosaurus , it was later found to be a distantly related titanosaur. So far, it is only known from Tanzania...
- JaxartosaurusJaxartosaurusJaxartosaurus is a genus of hadrosaurid dinosaur similar to Corythosaurus which lived during the Late Cretaceous. Its fossils were found in Kazakhstan and China. It had a large, helmet-like crest that it may have used for visual identification, or to vocalize with members of the same herd.The type...
- Jeholornis – actually a birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
- JeholosaurusJeholosaurusJeholosaurus is a genus of ornithischian dinosaur from the Early Cretaceous Period. It is thought to have been a small ornithopod presumably related to the hypsilophodonts, and an herbivore. Although the back teeth are like those of a plant eater, the front premaxillary teeth are sharp and pointed...
- Jenghizkhan – junior synonym of TarbosaurusTarbosaurusTarbosaurus is a genus of tyrannosaurid theropod dinosaur that flourished in Asia about 70 million years ago, at the end of the Late Cretaceous Period. Fossils have been recovered in Mongolia, with more fragmentary remains found further afield in parts of China. Although many species have been...
- "Jensenosaurus" – nomen nudum; SupersaurusSupersaurusSupersaurus is a genus of diplodocid sauropod dinosaur discovered by Vivian Jones of Delta, Colorado, in the Upper Jurassic Morrison Formation of Colorado in 1972. The fossil remains came from the Brushy Basin Member of the formation, dating to about 153 million years ago...
- JeyawatiJeyawatiJeyawati is a genus of hadrosauroid dinosaur which lived during the Turonian stage of the Late Cretaceous. The type species, J. rugoculus, was described in 2010, based on fossils recovered in the U.S. state of New Mexico....
- "Jiangjunmiaosaurus" – nomen nudum; MonolophosaurusMonolophosaurusMonolophosaurus was a genus of theropod dinosaur from the Middle Jurassic of the Shishugou Formation in what is now Xinjiang, China. It was named for the single crest on top of its skull. The type and only known individual is estimated at...
- JiangjunosaurusJiangjunosaurusJiangjunosaurus is a genus of stegosaurid dinosaur from the Oxfordian-age Shishugou Formation of the Junggar Basin, Xinjiang, China. Remains including the lower jaw, some skull bones, eleven articulated neck vertebrae, and two plates are known. The type species, J. junggarensis, was described by...
- JiangshanosaurusJiangshanosaurusJiangshanosaurus was a titanosaurian sauropod that lived approximately 105 million years ago, during the Albian stage of the Early Cretaceous. Its remains were discovered in Lixian Village, Jiangshan county, in the eastern Chinese province of Zhejiang. The type and only known species,...
- JinfengopteryxJinfengopteryxJinfengopteryx is a genus of maniraptoran dinosaur. It was found in the Qiaotou member of the Huajiying Formation of Hebei Province, China, and is therefore of uncertain age...
- JingshanosaurusJingshanosaurusJingshanosaurus is a genus of prosauropod dinosaurs from the Early Jurassic. Its fossils, a nearly complete skeleton including the skull, were found near the town of Jingshan , Lufeng County, Yunnan Province, China, from which the name derives. First described in 1995, the type species is J....
- JintasaurusJintasaurusJintasaurus is a genus of hadrosauriform dinosaur described by Hai-Lu You and Da-Qing Li in 2009. The type species is J. meniscus. Jintasaurus lived during the Early Cretaceous of what is now Gansu, northwestern China. The discovery supports the theory that hadrosaurs originated in Asia....
- JinzhousaurusJinzhousaurusJinzhousaurus is a genus of hadrosauroid dinosaur of the Early Cretaceous of China.The type species is Jinzhousaurus yangi. The generic name refers to the town Jinzhou. The specific name honours Yang Zhongjian as the founder of Chinese paleontology...
- JiutaisaurusJiutaisaurusJiutaisaurus is a genus of dinosaur from the Quantou Formation of China. Jiutaisaurus was a sauropod which lived during the Cretaceous. The type species, Jiutaisaurus xidiensis, was described by Wu et al. in 2006, and is based on eighteen vertebrae.-References:* Wu, W.-H., Dong, Z.-M., Sun, Y.-W.,...
- JixiangornisJixiangornisJixiangornis is the name given to a genus of basal bird from the Early Cretaceous. Like later birds, it had developed a beak, but it had a long tail, unlike modern birds. Since teeth were still present in some more advanced short-tailed birds, Jixiangornis seems to have evolved its beak...
– actually a birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from... - JobariaJobariaJobaria was a sauropod dinosaur discovered in the Sahara Desert in 1997. It was named after "Jobar", a creature of local legends, and is thought to have been about 18 metres long. It was found in the Tiourarén Formation, originally thought to represent the Hauterivian to Barremian stages of the...
- JubbulpuriaJubbulpuriaJubbulpuria is the name given to a dubious genus of small dinosaur from the Late Cretaceous of India.The genus was in 1932 named by Friedrich von Huene. The generic name refers to Jabalpur in the vicinity of which the fossils were found. The type species, Jubbulpuria tenuis, was described by von...
- Jurapteryx – junior synonym of the birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
ArchaeopteryxArchaeopteryxArchaeopteryx , sometimes referred to by its German name Urvogel , is a genus of theropod dinosaur that is closely related to birds. The name derives from the Ancient Greek meaning "ancient", and , meaning "feather" or "wing"... - "Jurassosaurus" – nomen nudum; TianchisaurusTianchisaurusTianchisaurus is a genus of ankylosaurian dinosaur from the middle Jurassic Period of China. If it actually belongs to the family Ankylosauridae as proposed by Dong Zhiming, it would be the earliest member of that family...
- JuravenatorJuravenatorJuravenator is a genus of small coelurosaurian dinosaur, which lived in the area which would someday become the Jura mountains of Germany, about 151 or 152 million years ago. It is known from a single, juvenile specimen...
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- "KagasaurusKagasaurus"Kagasaurus" is the informal name given to an as yet undescribed genus of dinosaur from the Early Cretaceous. It was a theropod which lived in what is now Japan. The type species was named by Hisa in 1988, but is known from only two teeth. Since "Kagasaurus" has never been formally described, it...
" – nomen nudum - KaijiangosaurusKaijiangosaurusKaijiangosaurus is the name given to a genus of dinosaur from the Middle Jurassic. It was a theropod like Megalosaurus. Its fossils, fragmentary remains of the skull, cervical vertebrae and elements of the pectoral girdle and both limbs, were found in China...
- KakuruKakuruKakuru is a genus of theropod dinosaur from the early Cretaceous Period.Kakuru is known primarily from a single fossilized tibia, which had been fossilized through a rare process in which the bone through hydration turned to opal. The bone has been dug up at the opal fields of Andamooka, South...
- KangnasaurusKangnasaurusKangnasaurus is a genus of iguanodontian ornithopod dinosaur found in supposedly Early Cretaceous rocks of South Africa. It is known from a tooth and possibly some postcranial remains. At times, it has been considered dubious or a valid genus...
- KarongasaurusKarongasaurusKarongasaurus is the name given to a genus of dinosaur from the Early Cretaceous. It was a titanosaurid sauropod. Its fossils, consisting solely of part of a lower mandible and a few teeth, were found in Malawi...
- "KatsuyamasaurusKatsuyamasaurus"Katsuyamasaurus" is the informal name given to an as yet undescribed genus of theropod dinosaur from the Early Cretaceous. It was a carnosaur which lived in what is now Japan. The type species was coined by Lambert in 1990, but is not formally described, making it a nomen nudum...
" – nomen nudum - KayentavenatorKayentavenatorKayentavenator is a small carnivorous dinosaur genus which lived during the Early Jurassic Period; fossils were recovered from the Kayenta Formation of northeastern Arizona and were described in 2010.-Description:...
- KelmayisaurusKelmayisaurusKelmayisaurus is an extinct genus of carcharodontosaurid theropod dinosaur from the early Cretaceous. Its name refers to the petroleum-producing city of Karamay in the Xinjiang province of western China near where it was found.-Discovery and species:...
- KemkemiaKemkemiaKemkemia is a genus of theropod dinosaur living in the Cretaceous, described from a single fossil in 1999 recovered from Morocco by an Italian team searching for fossil invertebrates....
- KentrosaurusKentrosaurusKentrosaurus is a genus of stegosaurid dinosaur from the Late Jurassic of Tanzania. Its fossils have been found only in the Tendaguru Formation of Tanzania, dated to the Kimmeridgian stage, between about 155.7 ± 4 Ma and 150.8 ± 4 Ma . Apparently, all finds belong to one species, K...
- Kentrurosaurus – junior synonym (unneeded replacement name) of KentrosaurusKentrosaurusKentrosaurus is a genus of stegosaurid dinosaur from the Late Jurassic of Tanzania. Its fossils have been found only in the Tendaguru Formation of Tanzania, dated to the Kimmeridgian stage, between about 155.7 ± 4 Ma and 150.8 ± 4 Ma . Apparently, all finds belong to one species, K...
- KerberosaurusKerberosaurusKerberosaurus was a genus of hadrosaurine duckbill dinosaur from the late Maastrichtian-age Upper Cretaceous Tsagayan Formation of Blagoveschensk, Amur Region, Russia...
- KhaanKhaanKhaan was an oviraptorid dinosaur that was found in the Djadochta Formation of Mongolia and lived in the Late Cretaceous Period , 75 million years ago....
- "Khateranisaurus" – misspelling of "KhetranisaurusKhetranisaurusKhetranisaurus is a genus of titanosaurian sauropod from the Late Cretaceous of Balochistan, western Pakistan . The type species is K. barkhani, described by M...
" - KhetranisaurusKhetranisaurusKhetranisaurus is a genus of titanosaurian sauropod from the Late Cretaceous of Balochistan, western Pakistan . The type species is K. barkhani, described by M...
- KileskusKileskusKileskus is a genus of tyrannosauroid dinosaur known from partial remains found in Middle Jurassic rocks of Krasnoyarsk Krai, Russia. Fossils recovered include the holotype maxilla, a premaxilla, a surangular, and a few bones from the hand and foot. The skull bones are similar to those of...
- Kinnareemimus
- "Kitadanisaurus" – nomen nudum; FukuiraptorFukuiraptorFukuiraptor was a medium-sized carnivore of the Early Cretaceous that lived in what is now Japan. Scientists first thought it was a member of the Dromaeosauridae, but after studying the fossils they now believe it was related to Allosaurus in the family Neovenatoridae. The type specimen is the...
- "Kittysaurus" – nomen nudum; EotyrannusEotyrannusEotyrannus was a genus of tyrannosauroid theropod dinosaur hailing from the Early Cretaceous Wessex Formation beds, included in Wealden Group, located in the southwest coast of the Isle of Wight, United Kingdom...
- KlamelisaurusKlamelisaurusKlamelisaurus is the name given to a genus of dinosaur from the Middle Jurassic. It was a sauropod similar to Bellusaurus, of which it may actually be an adult specimen. It was found in the Gobi desert of Asia.The type species, K...
- KolKol (dinosaur)Kol is a genus of alvarezsaurid theropod dinosaur from the Late Cretaceous of Mongolia. The type specimen was excavated from the Ukhaa Tolgod locality of the Djadochta Formation, dating to about 75 million years ago. It is believed to have been about twice the size of the contemporary Shuvuuia...
- KoparionKoparionKoparion is a genus of small theropod dinosaur, known only from isolated teeth. Koparion douglassi, the type specimen, was described by Chure in 1994, who believed it to be a coelurosaurian theropod, possibly one of the oldest known troodontids. Found in Utah, the fossil is from the late Jurassic...
- KoreaceratopsKoreaceratopsKoreaceratops is a genus of basal ceratopsian dinosaur discovered in Albian-age Lower Cretaceous rocks of South Korea. It is based on KIGAM VP 200801, an articulated series of 36 caudal vertebrae associated with partial hind limbs and ischia...
- KoreanosaurusKoreanosaurus (ornithopod)Koreanosaurus is a genus of ornithopod dinosaur. In May 2003 three fossils of Koreanosaurus were found in the Late Cretaceous-age Seonso Conglomerate from the southern coast of the Bi-bong Dinosaur Fossil Findspot, Boseong, Korean Peninsula: the holotype KDRC-BB2, a partial skeleton lacking the...
Huh et al., 2011 - "Koreanosaurus" Kim, 1979 – nomen nudum; name later used formally for a genus of ornithopodKoreanosaurus (ornithopod)Koreanosaurus is a genus of ornithopod dinosaur. In May 2003 three fossils of Koreanosaurus were found in the Late Cretaceous-age Seonso Conglomerate from the southern coast of the Bi-bong Dinosaur Fossil Findspot, Boseong, Korean Peninsula: the holotype KDRC-BB2, a partial skeleton lacking the...
- "Koreasaurus" – nomen nudum; probably an alternate spelling of "Koreanosaurus"
- KosmoceratopsKosmoceratopsKosmoceratops is a genus of herbivorous chasmosaurine ceratopsian dinosaur, which lived during the Late Cretaceous period in the part of the island continent Laramidia that is now Utah, United States...
- KotasaurusKotasaurusKotasaurus is the name given to a genus of dinosaur from the Early Jurassic period, about 208 million to 188 million years ago. It was an early sauropod, sharing some similarities with prosauropods...
- KoutalisaurusKoutalisaurusKoutalisaurus was a genus of hadrosaurid dinosaur. It is based on a mostly complete dentary from the Maastrichtian-age Upper Cretaceous Tremp Formation near the town of Abella de la Conca, Lleida, Spain...
- KritosaurusKritosaurusKritosaurus is an incompletely known but historically important genus of hadrosaurid dinosaur. It lived about 73 million years ago, in the Late Cretaceous of North America...
- KryptopsKryptopsKryptops is a genus of abelisaurid theropod dinosaur from the Early Cretaceous of Niger. It is known from a partial skeleton found at the Gadoufaoua locality in the western Ténéré Desert, in rocks of the Aptian-Albian age Elrhaz Formation...
- KrzyzanowskisaurusKrzyzanowskisaurusKrzyzanowskisaurus is the name given to a genus of archosaur from the Late Triassic. The generic name honours Stan Krzyżanowski. It is a tooth taxon, based on fossils only of teeth. These teeth have been found in the U.S. states of Arizona and New Mexico...
– probably a pseudosuchiaPseudosuchiaPseudosuchia is the name originally given to a group of prehistoric reptiles from the Triassic period. The name has been variously interpreted, and it is still sometimes, if infrequently, used in scientific literature today. A more commonly used name, Crurotarsi, is often substituted for...
n (?RevueltosaurusRevueltosaurusRevueltosaurus is a genus of prehistoric crurotarsan from Late Triassic New Mexico and Arizona.According to William Parker, who discovered the partial skeleton, "we have pretty much erased the record of Triassic ornithischian dinosaurs from North America, Europe and worldwide, except for South...
) - KukufeldiaKukufeldiaKukufeldia is a genus of iguanodont which existed in what is now England during the Early Cretaceous period. Identified from a nearly complete right dentary found near Cuckfield and originally described in 1848 by Gideon Mantell, it was named by Andrew T. McDonald, Paul M. Barrett, and Sandra D....
- KulceratopsKulceratopsKulceratops is a genus of ceratopsian dinosaur from the Early Cretaceous. It lived in the late Albian stage. It is one of the few ceratopsians known from this period. However, the fossils from this genus have been sparse: only jaw and tooth fragments have been found so far.-Naming:Kulceratops was...
- KunmingosaurusKunmingosaurus"Kunmingosaurus" is the name given to an as yet not formally described genus of dinosaur. It was a primitive sauropod which lived during the Early Jurassic. Its fossils were found in Yunnan Province, China in 1954, but without a formal description, it is considered a nomen nudum.The intended "type...
– may be a nomen nudum - KuszholiaKuszholiaKuszholia is the name given to a genus of primitive bird or bird-like dinosaur from the Late Cretaceous. It was possibly a coelurosaur close to the ancestry of birds, although most scientists have considered it an avialan...
– probably a birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
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- LabocaniaLabocaniaLabocania is a genus of theropod, possibly tyrannosauroid, dinosaur from Baja California, Mexico, which lived 70 million years ago, in the Campanian stage of the late Cretaceous Period. The name references the "La Bocana Roja" Formation, which translates as "red lips". The type species, L....
- Labrosaurus – junior synonym of AllosaurusAllosaurusAllosaurus is a genus of large theropod dinosaur that lived 155 to 150 million years ago during the late Jurassic period . The name Allosaurus means "different lizard". It is derived from the Greek /allos and /sauros...
- "Laelaps" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as DryptosaurusDryptosaurusDryptosaurus was a genus of primitive tyrannosaur that lived in Eastern North America during the middle Maastrichtian stage of the Late Cretaceous period. Although largely unknown now outside of academic circles, a famous painting of the genus by Charles R... - LaevisuchusLaevisuchusLaevisuchus is a genus of abelisauroid theropod dinosaur from the Late Cretaceous.Its remains were discovered by Charles Alfred Matley near Jabalpur in Maastrichtian deposits in the Lameta Formation in India, and named and described by paleontologists Friedrich von Huene and Matley in 1933. The...
- LagerpetonLagerpetonLagerpeton is a genus of basal dinosauromorph from the Ladinian . Lagerpeton is known from several specimens of hindlimbs, hips, vertebrae, and feet. It was about 0.7 metres long and was found in the Chañares Formation of Argentina. It has unique feet, with an unusually long fourth toe...
– actually a non-dinosaurian dinosauromorph - LagosuchusLagosuchusLagosuchus is a genus of small archosaur from the middle Triassic period. It is generally thought to be closely related to dinosaurs, as a member of the Dinosauromorpha...
– actually a non-dinosaurian dinosauromorph - LamaceratopsLamaceratopsLamaceratops,"Lama Horned Face", is a dinosaur from the Late Cretaceous period. It is classified as a ceratopsian, a herbivorous "frilled" or armored dinosaur similar to, but smaller than, Bagaceratops. It had a horn on the front of its face, much like most of the later Ceratopsids.The fossils of...
- LambeosaurusLambeosaurusLambeosaurus is a genus of hadrosaurid dinosaur that lived about 76 to 75 million years ago, in the Late Cretaceous Period of North America. This bipedal/quadrupedal, herbivorous dinosaur is known for its distinctive hollow cranial crest, which in the best-known species resembled a hatchet...
- LametasaurusLametasaurusLametasaurus named for the Lameta Formation, Jabalpur, India, is the generic name given to a possible dubious dinosaur species. Originally it indicated a possible chimera composed of several different animals....
- LamplughsauraLamplughsauraLamplughsaura is a genus of saurischian dinosaur from the Sinemurian-age Dharmaram Formation of India, between 196 to 190 million years ago. The type species is L...
- Lanasaurus
- "Lancangjiangosaurus" – variant spelling of "LancanjiangosaurusLancanjiangosaurus"Lancanjiangosaurus" is the informal name given to an as yet undescribed genus of sauropod dinosaur from the Middle Jurassic. The "type species", "L. cachuensis", was coined by Zhou in 1985, but remains a nomen nudum. It is known from the Dapuka Group of Tibet...
" - "Lancangosaurus" – variant spelling of "LancanjiangosaurusLancanjiangosaurus"Lancanjiangosaurus" is the informal name given to an as yet undescribed genus of sauropod dinosaur from the Middle Jurassic. The "type species", "L. cachuensis", was coined by Zhou in 1985, but remains a nomen nudum. It is known from the Dapuka Group of Tibet...
" - "LancanjiangosaurusLancanjiangosaurus"Lancanjiangosaurus" is the informal name given to an as yet undescribed genus of sauropod dinosaur from the Middle Jurassic. The "type species", "L. cachuensis", was coined by Zhou in 1985, but remains a nomen nudum. It is known from the Dapuka Group of Tibet...
" – nomen nudum - LanzhousaurusLanzhousaurusLanzhousaurus is a genus of dinosaur. Lanzhousaurus lived in the Gansu region of what is now China during the Early Cretaceous. A partial skeleton has been recovered...
- LaornisLaornisLaornis is a genus of a prehistoric neornithine birds, known only from Specimen YPM 820, a single tibiotarsus leg bone discovered in the late 19th century. Consequently the genus is monotypic, containing only the species Laornis edvardsianus. Regarding its scientific name, Laornis means "stone...
– actually a birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from... - LaosaurusLaosaurusLaosaurus is a genus of hypsilophodont dinosaur. The type species is Laosaurus celer, first described by O.C. Marsh in 1878 from remains from the Oxfordian-Tithonian-age Upper Jurassic Morrison Formation of Wyoming. The validity of this genus is doubtful because it is based on fragmentary fossils...
- LaplatasaurusLaplatasaurusLaplatasaurus is a genus of titanosaurid sauropod dinosaur that lived during the Late Cretaceous in South America....
- LapparentosaurusLapparentosaurusLapparentosaurus is a genus of macronarian sauropod dinosaur from the Middle Jurassic. Its fossils were found in Madagascar.In 1895 Richard Lydekker named a new species of Bothriospondylus, B. madagascariensis based on fossils found before 1894 by J.T. Last in the Majunga Basin in layers of the...
- LeaellynasauraLeaellynasauraLeaellynasaura is a genus of small herbivorous ornithischian dinosaur from the Albian stage of the Early Cretaceous, first discovered in Dinosaur Cove, Australia. The type species is Leaellynasaura amicagraphica...
- Leipsanosaurus – junior synonym of StruthiosaurusStruthiosaurusStruthiosaurus is one of the smallest known and most basal genera of nodosaurid dinosaurs, from the Late Cretaceous period of Austria, Romania and France in Europe. It was protected by body armour...
- "Lengosaurus" – nomen nudum; EotyrannusEotyrannusEotyrannus was a genus of tyrannosauroid theropod dinosaur hailing from the Early Cretaceous Wessex Formation beds, included in Wealden Group, located in the southwest coast of the Isle of Wight, United Kingdom...
- LeonerasaurusLeonerasaurusLeonerasaurus is a basal genus of sauropodomorph dinosaur. Currently, there is only one species known, named L. taquetrensis by Diego Pol, Alberto Garrido and Ignacio A. Cerda in 2011. The fossil, an incomplete subadult individual, was found in the Las Leoneras Formation in Argentina. This...
- LeptoceratopsLeptoceratopsLeptoceratops , was a primitive ceratopsian dinosaur genus from the Late Cretaceous Period of what is now Western North America, at the same time as its giant...
- Leptospondylus – junior synonym of MassospondylusMassospondylusMassospondylus and ) is a genus of prosauropod dinosaur from the early Jurassic Period . It was described by Sir Richard Owen in 1854 from remains found in South Africa, and is thus one of the first dinosaurs to have been named...
- LeshansaurusLeshansaurusLeshansaurus is a genus of theropod dinosaur from the Mid to Late Jurassic Dashanpu Formation of what is now China. It was described in 2009 by a team of Chinese paleontologists. The type species is L. qianweiensis. Fossils of Leshansaurus were discovered in strata from the Shangshaximiao...
- LesothosaurusLesothosaurusLesothosaurus is an herbivorous ornithischian dinosaur. It was named by paleontologist Peter Galton in 1978, the name meaning "lizard from Lesotho". The genus is monotypic, having only one valid species, Lesothosaurus diagnosticus, within the genus....
- LessemsaurusLessemsaurusLessemsaurus is an extinct genus of sauropodomorph dinosaur named for the writer of popular science books Don Lessem. The type species, L. sauropoides, was formally described by José Fernando Bonaparte in 1999...
- LevnesoviaLevnesoviaLevnesovia is a genus of hadrosauroid dinosaur from the Late Cretaceous of Uzbekistan. It was related to Bactrosaurus. The type species is L. transoxiana. The genus name honours the late Russian paleontologist Lev Nesov, and the specific name refers to the ancient region Transoxiana...
- LewisuchusLewisuchusLewisuchus is a genus of archosaur that lived during the Middle Triassic ; it was a silesaurid dinosauriform, a member of the group of reptiles which lead to the dinosaurs. Lewisuchus was about three feet long. Fossils have been found in Argentina...
– actually a non-dinosaurian dinosauromorph - LexovisaurusLexovisaurusLexovisaurus was one of the first dinosaurs from mid-to-Late Jurassic Europe, 164.7 mya to be discovered. It was a stegosaur. Its fossils have been found in France and northern England....
- LeyesaurusLeyesaurusLeyesaurus is an extinct genus of massospondylid sauropodomorph known from the San Juan Province, northwestern Argentina.-Description:...
- LiaoceratopsLiaoceratopsLiaoceratops, meaning "Liao Horned Face", is a ceratopsian dinosaur believed to be an early relative of the horned ceratopsids. It lived in the early Cretaceous, some 130 million years ago. It was discovered in China by a team of American and Chinese scientists...
- LiaoningosaurusLiaoningosaurusLiaoningosaurus is a very unusual ankylosaur from the Lower Cretaceous. The holotype IVPP V12560 , an essentially complete juvenile skeleton compressed on a slab, was collected from the Yixian Formation of Liaoxi, Yixian County, Liaoning Province, People's Republic of China.The type species...
- "LiassaurusLiassaurus"Liassaurus" is the informal name given to an as yet undescribed genus of dinosaur from the Early Jurassic. It was a probable ceratosaur which lived in what is now Europe. The type species, "L. huenei", was coined by Welles, H.P...
" – nomen nudum - LibycosaurusLibycosaurusLibycosaurus was one of the last anthracothere genera. It lived from the Middle to the Late Miocene, and ranged throughout Central and Northern Africa, and in Uganda, in what was then a lush, marshy environment....
– actually an anthracothere mammalMammalMammals are members of a class of air-breathing vertebrate animals characterised by the possession of endothermy, hair, three middle ear bones, and mammary glands functional in mothers with young... - LigabueinoLigabueinoLigabueino is a genus of noasaurid dinosaur named after Italian doctor Giancario Ligabue. It is known only from an extremely fragmentary specimen, measuring 70 cm long. In spite of initial reports that it was an adult, the unfused vertebrae indicate that the specimen was a juvenile...
- LigabuesaurusLigabuesaurusLigabuesaurus is a genus of dinosaur from the Early Cretaceous . It was a basal titanosaurid sauropod which lived in what is now Argentina. The type species, Ligabuesaurus leanzai, was described by Jose Bonaparte, Gonzalez Riga, and Sebastián Apesteguía in 2006, based on a partial skeleton...
- "Ligomasaurus" – nomen nudum, probably BrachiosaurusBrachiosaurusBrachiosaurus is a genus of sauropod dinosaur from the Jurassic Morrison Formation of North America. It was first described by Elmer S. Riggs in 1903 from fossils found in the Grand River Canyon of western Colorado, in the United States. Riggs named the dinosaur Brachiosaurus altithorax,...
or Giraffatitan - "LikhoelesaurusLikhoelesaurus"Likhoelesaurus" is the name given to an as yet undescribed genus of dinosaur from the Late Triassic of what is now South Africa. The name was coined by Ellenberger in 1972 , and the "type species" is "Likhoelesaurus ingens". It is named after the town where the fossils were found...
" – nomen nudum; possibly non-dinosaurian - LiliensternusLiliensternusLiliensternus was a genus of coelophysoid dinosaur from the Late Triassic period, about 205 Ma.Liliensternus was originally named in 1934 by Friedrich von Huene as a second species of Halticosaurus, H. liliensterni, the specific name honouring the German amateur paleontologist, Dr...
- LimaysaurusLimaysaurusLimaysaurus is a herbivorous rebbachisaurid sauropod dinosaur from the Lower Cretaceous of northwestern Patagonia.Limaysaurus includes a single type species, Limaysaurus tessonei, which was originally referred to the genus Rebbachisaurus as Rebbachisaurus tessonei by Jorge Calvo and Leonardo...
- "Limnornis" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as the birds EurolimnornisEurolimnornisEurolimnornis is the name given to a monotypic genus of fossil bird from the Early Cretaceous. E. corneti probably was a primitive, but essentially modern bird and may indeed be an early neognathe ancestral to the grebes, although the alternative theories that it was a theropod or pterosaur or a...
and PalaeocursornisPalaeocursornisPalaeocursornis is a monotypic genus of prehistoric bird. The species P. corneti, described in 1984, was initially assumed to be a flightless paleognathe, possibly a ratite, but it may actually be more primitive and not even a neornithine but an ornithuromorph bird or indeed not a bird at all... - "Limnosaurus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as TelmatosaurusTelmatosaurusTelmatosaurus is a genus of basal hadrosaurid dinosaur from the Late Cretaceous. It was a relatively small hadrosaur, approximately five meters long, found in what is now Romania.... - LimusaurusLimusaurusLimusaurus is a genus of toothless herbivorous theropod dinosaur from the Jurassic Upper Shishugou Formation in the Junggar Basin of western China. Limusaurus is also the first definitely known ceratosaur from Eastern Asia, including China...
- LinhenykusLinhenykusLinhenykus is an extinct genus of alvarezsaurid theropod dinosaur from the Late Cretaceous of Inner Mongolia, China. It is the most basal known member of the Parvicursorinae. The genus gets its name from Linhe, a city near the site where fossils were first found and Greek onyx, "claw"...
- LinheraptorLinheraptorLinheraptor is a genus of dromaeosaurid dinosaur which lived in what is now China in the Late Cretaceous. It was named by Xu Xing and colleagues in 2010, and contains the species Linheraptor exquisitus. This bird-like dinosaur was less than 2 m long and was found in Inner Mongolia...
- LinhevenatorLinhevenatorLinhevenator is a genus of short-armed troodontid theropod dinosaur from the Late Cretaceous Bayan Mandahu Formation of Bayan Mandahu, Inner Mongolia, China....
- LirainosaurusLirainosaurusLirainosaurus is the name given to a genus of dinosaur from the Late Cretaceous. It was a titanosaurid sauropod which lived in what is now Spain. The type species, Lirainosaurus astibiae, was described by Sanz, Powell, Le Loeuff, Martinez, and Pereda-Suberbiola in 1999.-References:J. L. Sanz, J. E....
- LisboasaurusLisboasaurusLisboasaurus is a small genus of Mesozoic crocodylomorph that lived in fresh water. It is known from fossilized tooth and jaw fragments of Late Jurassic and Early Cretaceous age. Two species have been described. In the past Lisboasaurus has been interpreted as a Mid Jurassic avialan, troodontid,...
– actually a crocodiliaCrocodiliaCrocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
n - LiubangosaurusLiubangosaurusLiubangosaurus is a genus of sauropod dinosaur which lived during the Early Cretaceous in what is now southern China. Liubangosaurus is known from the holotype NHMG8152, five nearly complete and articulated middle-caudal dorsal vertebrae referred to as. It was collected from the Napai Formation in...
- LoncosaurusLoncosaurusLoncosaurus was a genus of ornithopod dinosaur from the Upper Cretaceous of Provincia de Santa Cruz, Argentina. The type species is Loncosaurus argentinus, described by the famous Argentinian paleontologist Florentino Ameghino, but is considered a dubious name...
- LongisquamaLongisquamaLongisquama insignis is an extinct lizard-like reptile known only from one poorly preserved and incomplete fossil. It lived during the middle or late Triassic Period, 230-225 million years ago, in what is now Kyrgyzstan...
– actually some sort of non-dinosaurian reptileReptileReptiles are members of a class of air-breathing, ectothermic vertebrates which are characterized by laying shelled eggs , and having skin covered in scales and/or scutes. They are tetrapods, either having four limbs or being descended from four-limbed ancestors... - Longosaurus – junior synonym of CoelophysisCoelophysisCoelophysis , meaning "hollow form" in reference to its hollow bones , is one of the earliest known genera of dinosaur...
- LophorhothonLophorhothonLophorhothon is a genus of hadrosauroid dinosaur from the Late Cretaceous, the first genus of dinosaur discovered in Alabama.-Discovery and naming:...
- LophostropheusLophostropheusLophostropheus was a genus of coelophysoid dinosaur from the Rhaetian-Hettangian stage border Moon-Airel Formation of Normandy, France. It is based on a partial skeleton first described in 1966 as a specimen of Halticosaurus...
- LoricatosaurusLoricatosaurusLoricatosaurus is a genus of stegosaurid dinosaur from Callovian-age rocks of England and France...
- Loricosaurus – possible junior synonym of NeuquensaurusNeuquensaurusNeuquensaurus is a genus of saltasaurid sauropod dinosaur that appeared in the Late Cretaceous, 71 million years ago in Argentina and Uruguay in South America...
- LosillasaurusLosillasaurusLosillasaurus is a genus of sauropod dinosaur from the Jurassic-Cretaceous boundary in the southeast of Spain. The type species of the turiasaurian Losillasaurus giganteus was discovered in the Los Serranos basin in Valencia and formally described by Casanovas, Santafé and Sanz in 2001...
- LourinhanosaurusLourinhanosaurusLourinhanosaurus was a carnivorous theropod dinosaur genus that lived during the Late Jurassic Period . Its first remains were found at Peralta, near Lourinhã, Portugal in 1982, but were not described until 1998, by Portuguese paleontologist Octávio Mateus.Its type species is L...
- LourinhasaurusLourinhasaurusLourinhasaurus was a sauropod dinosaur genus hailing from Late Jurassic strata from two localities in Estremadura, Portugal. It was described by Dantas et al. in 1998. Its type species is L...
- LuanchuanraptorLuanchuanraptorLuanchuanraptor is a genus of dromaeosaurid theropod dinosaur from the Late Cretaceous of China. It is based on a partial skeleton from the Qiupa Formation in Luanchuan, Henan. A medium-sized dromaeosaurid, it is the first Asian dromaeosaurid described from outside the Gobi Desert or northeastern...
- "Luanpingosaurus" – nomen nudum; PsittacosaurusPsittacosaurusPsittacosaurus is a genus of psittacosaurid ceratopsian dinosaur from the Early Cretaceous Period of what is now Asia, about 130 to 100 million years ago. It is notable for being the most species-rich dinosaur genus...
- LucianosaurusLucianosaurusLucianosaurus was an archosauriform genus of unknown affinities, initially described as a basal ornithischian dinosaur, and known only from teeth. It was found in Late Triassic strata in Eastern New Mexico, United States. The generic name refers to Luciano Mesa where the fossil remains were found....
– actually a non-dinosaurian archosauriform - Lufengocephalus – junior synonym of LufengosaurusLufengosaurusLufengosaurus is a genus of prosauropod dinosaur which lived during the Early Jurassic period in what is now southwestern China.-Discovery and species:...
- LufengosaurusLufengosaurusLufengosaurus is a genus of prosauropod dinosaur which lived during the Early Jurassic period in what is now southwestern China.-Discovery and species:...
- LukousaurusLukousaurusLukousaurus is a taxon based on most of a small skull’s snout, displaying distinctive lachrymal horns, found in the Early Jurassic-age Lower Lufeng Formation, Yunnan, China and was described by Chung Chien Young in 1948....
- LuoyanggiaLuoyanggiaLuoyanggia is a genus of oviraptorid dinosaur first reported from the Ruyang Basin, Henan Province of central China in 2009. The formation dates to the Cenomanian stage of the late Cretaceous period, around 96 million years ago. The type species is L. liudianensis....
- LurdusaurusLurdusaurusLurdusaurus is a genus of large ornithopod dinosaur which lived in the Aptian stage of the Early Cretaceous, sometime between 121 to 112 million years ago.-Discovery and naming:...
- LusitanosaurusLusitanosaurusLusitanosaurus is a genus of basal thyreophoran dinosaur from the Early Jurassic of Portugal.The genus was first described by Albert-Félix de Lapparent and Georges Zbyszewski in 1957. The type species is Lusitanosaurus liasicus. The generic name is derived from Lusitania, the ancient Latin name...
- LusotitanLusotitanLusotitan is a genus of herbivorous brachiosaurid sauropod dinosaur from the Late Jurassic Period of Portugal.In 1947 by Manuel de Matos, collector of the Geological Survey of Portugal, fossils of a large sauropod were found in the Portuguese Lourinhã Formation dating to the Tithonian stage of the...
- LycorhinusLycorhinusLycorhinus is a genus of heterodontosaurid ornithischian dinosaur hailing from the Early Jurassic strata of the Elliot Formation located in the Cape Province, South Africa....
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- MacelognathusMacelognathusMacelognathus is an extinct genus of sphenosuchian crocodile from the Late Jurassic. Originally it was believed be a theropod dinosaur. It lived in what is now Wyoming, in North America....
– actually a sphenosuchian crocodiliaCrocodiliaCrocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
n - MachairasaurusMachairasaurusMachairasaurus is a genus of oviraptorid dinosaur which was found in the Bayan Mandahu Formation, China during the late Cretaceous period. It was first named by Nicholas R. Longrich, Philip J. Currie and Dong Zhi-Ming in 2010 and the type species is Machairasaurus leptonychus....
- MacrodontophionMacrodontophionMacrodontophion is the name given to a dubious genus of reptile from the Late Jurassic. It was a possible dinosaur, plesiosaur, or crocodylian. The type species, Macrodontophion , was described by Zborzewsky in 1834, but is considered a nomen dubium, because it is based on a sole tooth...
- MacrogryphosaurusMacrogryphosaurusMacrogryphosaurus is a genus of basal iguanodont dinosaur from the Turonian-early Coniacian age Upper Cretaceous Portezuelo Formation of Patagonia, Argentina. It was described by Jorge Calvo and colleagues, with M...
- Macrophalangia – junior synonym of ChirostenotesChirostenotesChirostenotes is a genus of oviraptorosaurian dinosaur from the late Cretaceous of Alberta, Canada. The type species is Chirostenotes pergracilis. Some researchers recognize a second species, C...
- "Macroscelosaurus" – nomen nudum; probable junior synonym of TanystropheusTanystropheusTanystropheus , was a 6 metre long reptile that dated from the Middle Triassic period. It is recognisable by its extremely elongated neck, which measured 3 metres long - longer than its body and tail combined. Despite this length, it had only ten neck vertebrae, each quite long...
- MacrurosaurusMacrurosaurusMacrurosaurus is the name given to a genus of dinosaur from the Early Cretaceous. It was a titanosauriform which lived in what is now Europe....
- "MadseniusMadsenius"Madsenius" is the name given to an as-yet undescribed genus of dinosaur from the Late Jurassic of North America, from the Morrison Formation. It was a theropod which may have been closely related to Allosaurus, or even a species of Allosaurus...
" – nomen nudum - MagnirostrisMagnirostrisMagnirostris, from the Latin "magnus" 'large' and "rostrum" 'beak', is the name given to a genus of dinosaur from the Late Campanian epoch in the Late Cretaceous. It was a ceratopsian which lived in Inner Mongolia in China...
- MagnosaurusMagnosaurusMagnosaurus was a genus of basal tetanuran theropod dinosaur from the Middle Jurassic of England. It is based on fragmentary remains and has often been confused with or included in Megalosaurus.-History and taxonomy:...
- "MagulodonMagulodon"Magulodon" is the name given to an as yet undescribed genus of dinosaur from the Early Cretaceous . It was a possible ornithischian, either an ornithopod or basal ceratopsian, which lived in what is now Maryland, in the United States. The type species, "Magulodon muirkirkensis", was coined by...
" – nomen nudum - MagyarosaurusMagyarosaurusMagyarosaurus is a genus of dwarf sauropod dinosaur from late Cretaceous Period in what is now Romania. It is one of the smallest-known adult sauropods, measuring only six meters in length. The type species is Magyarosaurus dacus...
- MahakalaMahakala (dinosaur)Mahakala is a genus of basal dromaeosaurid dinosaur from the Campanian-age Upper Cretaceous Djadokhta Formation of Ömnögov, Mongolia. It is based on a partial skeleton found in the Gobi Desert...
- MaiasauraMaiasauraMaiasaura is a large duck-billed dinosaur genus that lived in the area currently covered by the state of Montana in the Upper Cretaceous Period , about 74 million years ago....
- MajungasaurusMajungasaurusMajungasaurus is a genus of abelisaurid theropod dinosaur that lived in Madagascar from 70 to 65.5 million years ago, at the end of the Cretaceous Period. Only one species has been identified...
- Majungatholus – probable junior synonym of MajungasaurusMajungasaurusMajungasaurus is a genus of abelisaurid theropod dinosaur that lived in Madagascar from 70 to 65.5 million years ago, at the end of the Cretaceous Period. Only one species has been identified...
- MalarguesaurusMalarguesaurusMalarguesaurus is a genus of titanosauriform sauropod dinosaur from the Late Cretaceous of Mendoza Province, Argentina. Its fossils, consisting of tail vertebrae, chevrons, ribs, and limb bones, were found in the late Turonian-early Coniacian-age Portezuelo Formation of the Neuquén Group...
- MalawisaurusMalawisaurusMalawisaurus was a genus of sauropod dinosaur . It lived in what is now Africa, specifically Malawi, during the Aptian age of the Early Cretaceous Period. It is one of the few titanosaurs for which skull material has been found.It was named by Louis L. Jacobs and colleagues, and was originally...
- Maleevosaurus – junior synonym of TarbosaurusTarbosaurusTarbosaurus is a genus of tyrannosaurid theropod dinosaur that flourished in Asia about 70 million years ago, at the end of the Late Cretaceous Period. Fossils have been recovered in Mongolia, with more fragmentary remains found further afield in parts of China. Although many species have been...
- MaleevusMaleevusMaleevus is a genus of ankylosaurid dinosaur that is known only from the jawbone and part of the skull discovered in 1952 by Soviet palaeontologist Evgenii Aleksandrovich Maleev. It has been estimated that Maleevus was about 6 meters long...
- MamenchisaurusMamenchisaurusMamenchisaurus was a plant-eating four-legged dinosaur, known for its remarkably long neck which made up half its total length. It is known from numerous species which ranged in time from 160 to 145 million years ago, from the Oxfordian to Tithonian ages of the late Jurassic Period of...
- "ManidensManidensManidens is a genus of heterodontosaurid dinosaur from the Middle Jurassic of Patagonia. Fossils have been found from the Cañadon Asfalto Formation in Chubut Province, Argentina, dating to the Bajocian.-Etymology:...
" – nomen nudum - MandschurosaurusMandschurosaurusMandschurosaurus is a hadrosaur taxon based on material from the Upper Cretaceous of Belye Kruchi, Manchuria. M. amurensis is based on a poorly preserved and incomplete skeleton collected by Russian scientists in 1914 from the banks of the Amur River...
- Manospondylus – synonym of TyrannosaurusTyrannosaurusTyrannosaurus meaning "tyrant," and sauros meaning "lizard") is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex , commonly abbreviated to T. rex, is a fixture in popular culture. It lived throughout what is now western North America, with a much wider range than other...
- MantellisaurusMantellisaurusMantellisaurus is a genus of dinosaur formerly known as Iguanodon atherfieldensis. The new genus was erected by Gregory Paul in 2007. According to Paul, it is more lightly built than Iguanodon and more closely related to Ouranosaurus, making Iguanodon in its traditional sense paraphyletic. It is...
- MapusaurusMapusaurusMapusaurus was a giant carnosaurian dinosaur from the early Late Cretaceous of what is now Argentina. It was similar in size to its close relative Giganotosaurus, with the largest known individuals estimated as over in length and weighing approximately...
- MarasuchusMarasuchusMarasuchus is a genus of dinosaur-like ornithodiran from the middle Triassic Chañares Formation of Argentina. The species Marasuchus lilloensis was originally described as a second species of Lagosuchus, L. lilloensis...
– actually a non-dinosaurian dinosauromorph - MarisaurusMarisaurusMarisaurus is a genus of titanosaurian sauropod from the Late Cretaceous of Balochistan, western Pakistan. The type species is M. jeffi, described by M. Sadiq Malkani in 2006, and it is based on tail vertebrae, found in the Maastrichtian-age Vitakri Member of the Pab Formation...
- Marmarospondylus – probable junior synonym of BothriospondylusBothriospondylusBothriospondylus is an dubious genus of sauropod dinosaur. It lived during the Late Jurassic.The type species, Bothriospondylus suffossus, was described by Richard Owen in 1875. The specific epithet suffossus means "undermined" in Latin, a reference to the fact that pleurocoels had hollowed out...
- MarshosaurusMarshosaurusMarshosaurus was a genus of medium sized theropod, with a size up to 5 or 6 meters in length and a skull about 60 cm long. It is known from parts of at least three individuals from the Morrison Formation of Utah and Colorado.The holotype is a left ilium, or upper pelvis bone found at the...
- MasiakasaurusMasiakasaurusMasiakasaurus was a small predatory theropod dinosaur from the Late Cretaceous of Madagascar. It was named in 2001 by Scott D. Sampson, Matthew Carrano, and Catherine A. Forster. Unlike most theropods, the front teeth of Masiakasaurus projected forward instead of straight down...
- MassospondylusMassospondylusMassospondylus and ) is a genus of prosauropod dinosaur from the early Jurassic Period . It was described by Sir Richard Owen in 1854 from remains found in South Africa, and is thus one of the first dinosaurs to have been named...
- MaxakalisaurusMaxakalisaurusMaxakalisaurus is a genus of aeolosaurid dinosaur, found in Brazil, 45 kilometers from the city of Prata, in the state of Minas Gerais in 1998...
- MedusaceratopsMedusaceratopsMedusaceratops is a genus of herbivorous ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now Montana. It is known from two partial parietals, the holotype WDC DJR 001 and the paratype WDC DJR 002...
- "MegacervixosaurusMegacervixosaurus"Megacervixosaurus" is the informal name given to an as yet undescribed genus of herbivorous dinosaur from the Late Cretaceous. It was a sauropod which lived in what is now China...
" – nomen nudum - "Megadactylus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as AnchisaurusAnchisaurusAnchisaurus is a genus of basal sauropodomorph, and was an early herbivorous dinosaur. Until recently it was classed as a member of Prosauropoda. The name comes from the Greek αγχι/agkhi... - "Megadontosaurus" – nomen nudum; MicrovenatorMicrovenatorMicrovenator is a genus of dinosaur from the Early Cretaceous Cloverly Formation in what is now south central Montana. Microvenator was an oviraptorosaurian theropod. The holotype fossil is an incomplete skeleton, most likely a juvenile, with a living length of about four feet. The adult size of...
- MegalosaurusMegalosaurusMegalosaurus is a genus of large meat-eating theropod dinosaurs of the Middle Jurassic period of Europe...
- MegapnosaurusMegapnosaurusMegapnosaurus was a dinosaur of the theropod family Coelophysidae, formerly called Syntarsus , living during the Early Jurassic. It was renamed by American entomologist Dr. Michael Ivie , Polish Australian Dr...
- MegaraptorMegaraptorMegaraptor is a genus of large theropod dinosaur that lived in the Coniacian stage of the Late Cretaceous. Its fossils have been discovered in the Patagonian region of Argentina...
- MeiMei (dinosaur)Mei is a genus of duck-sized troodontid dinosaur first unearthed by paleontologists in Liaoning, China in 2004. Mei lived during the Early Cretaceous Period. Its binomial name, Mei long means sleeping dragon...
- MelanorosaurusMelanorosaurusMelanorosaurus , is a genus of basal sauropodomorph dinosaur that lived during the Late Triassic period. A herbivore from South Africa, it had a large body and sturdy limbs, suggesting it moved about on all fours...
- MendozasaurusMendozasaurusMendozasaurus is a genus of sauropod dinosaur. It was a member of Titanosauria, which were massive sauropods that were common on the southern landmasses during the Cretaceous period....
- "MerosaurusMerosaurus"Merosaurus" is the informal name given to an as yet undescribed genus of dinosaur from the Early Jurassic ....
" – nomen nudum - MetriacanthosaurusMetriacanthosaurusMetriacanthosaurus is a genus of sinraptorid dinosaur from the upper Oxford Clay of England, dating to the mid-Jurassic Period, about 160 million years ago ....
- "MicrocephaleMicrocephale"Microcephale" is the informal name of a genus of very small pachycephalosaurid dinosaur, otherwise known as the "North American dwarf species", which lived during the Late Cretaceous. Its fossils were found in the late Campanian-age Dinosaur Park Formation, in Alberta, Canada...
" – nomen nudum - "MicroceratopsMicroceratopsMicroceratus is a genus of small ceratopsian dinosaur that lived in the Cretaceous period in Asia. It walked on two legs, had short front arms, a characteristic ceratopsian frill and beak-like mouth, and was maybe long...
" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as Microceratus - Microceratus
- Microcoelus – junior synonym of SaltasaurusSaltasaurusSaltasaurus is a genus of titanosaurid sauropod dinosaur of the Late Cretaceous Period. Relatively small among sauropods, though still massive by the standards of modern creatures, Saltasaurus was characterized by a diplodocid-like head...
- "MicrodontosaurusMicrodontosaurus"Microdontosaurus" is the name given to an as yet undescribed genus of sauropod dinosaur from China. It was named from fossils from the Middle Jurassic-age Dapuka Group of Xinjiang, and assigned to the Homalosaurpoidea, an outdated classification of diplodocids and titanosaurs. The intended type...
" – nomen nudum - MicrohadrosaurusMicrohadrosaurusMicrohadrosaurus is a genus of duckbill dinosaur from the Campanian or Maastrichtian-age Upper Cretaceous Yuanpu Formation of Guangdong, China...
- MicropachycephalosaurusMicropachycephalosaurusMicropachycephalosaurus is a monotypic genus of ornithischian dinosaur. It lived in Shandong Province, China during the Late Cretaceous period . The incomplete skeleton of the single specimen was found on a cliff southwest of Laiyang...
- MicroraptorMicroraptorMicroraptor is a genus of small, four-winged dromaeosaurid dinosaurs. Numerous well-preserved fossil specimens have been recovered from Liaoning, China...
- Microsaurops – junior synonym of SaltasaurusSaltasaurusSaltasaurus is a genus of titanosaurid sauropod dinosaur of the Late Cretaceous Period. Relatively small among sauropods, though still massive by the standards of modern creatures, Saltasaurus was characterized by a diplodocid-like head...
- MicrovenatorMicrovenatorMicrovenator is a genus of dinosaur from the Early Cretaceous Cloverly Formation in what is now south central Montana. Microvenator was an oviraptorosaurian theropod. The holotype fossil is an incomplete skeleton, most likely a juvenile, with a living length of about four feet. The adult size of...
- "MifunesaurusMifunesaurusMifunesaurus is the name given to an as yet undescribed genus of dinosaur from the Late Cretaceous and is therefore a nomen nudum. It was a carnivorous theropod, probably a Tetanuran, which lived in what is now Japan during the Cenomanian stage of the early Late Cretaceous, around 95 million years...
" – nomen nudum - MinmiMinmi (dinosaur)Minmi, named after Minmi Crossing, Australia , is a genus of small ankylosaurian dinosaur that lived during the early Cretaceous Period, about 119 to 113 million years ago. The type species, M. paravertebra, was described by Ralph Molnar in 1980...
- MinotaurasaurusMinotaurasaurusMinotaurasaurus is a genus of ankylosaurine ankylosaurid dinosaur that lived during the Late Cretaceous. It was named in 2009 by Clifford A. Miles and Clark J. Miles and the type species is Minotaurasaurus ramachandrani. The generic name is explained by the describers as meaning "man-bull reptile";...
- MiragaiaMiragaia (dinosaur)Miragaia is a genus of stegosaurid dinosaur. Its fossils have been found in Upper Jurassic rocks in Portugal...
- MirischiaMirischiaMirischia is a small extinct genus of compsognathid dinosaur from the Albian stage of Brazil. Though presently known only from a pelvis and incomplete hind limbs, it preserves enough information to show that it should be recognized as a distinct species...
- "MoabosaurusMoabosaurus"Moabosaurus" is the informal name given to an as yet undescribed genus of dinosaur from the Early Cretaceous. It was possibly a camarasaurid sauropod, and was discovered in the Cedar Mountain Formation near Moab, Utah. The full binomial name, "Moabosaurus utahensis", first appeared in print in...
" – nomen nudum - MochlodonMochlodonMochlodon is a genus of iguanodont dinosaur from the Late Cretaceous.In 1859 coal mine administrator Pawlowitsch notified the University of Vienna that some fossils had been found in the Gute Hoffnung mine at Muthmannsdorf in Austria...
- "Mohammadisaurus" – nomen nudum; TornieriaTornieriaTornieria is a genus of diplodocid sauropod dinosaur from Late Jurassic of Tanzania. It has a convoluted taxonomic history.-Discovery and naming:...
- MojoceratopsMojoceratopsMojoceratops is a genus of ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now Western Canada...
- MongolosaurusMongolosaurusMongolosaurus is a genus of sauropod dinosaur which lived during the Early Cretaceous of China.In 1928 a team from the American Museum of Natural History, headed by Roy Chapman Andrews, at On Gong Gol near Hukongwulong in Inner Mongolia, in Quarry 714 discovered a sauropod tooth. In 1933 Charles W...
- MonkonosaurusMonkonosaurusMonkonosaurus is the name given to a dubious genus of dinosaur from the Late Jurassic . It was a stegosaur which lived in what is now Tibet. The type specimen, Monkonosaurus lawulacus was formalized by Zhao in 1983, but is based only on one partial skeleton...
- MonocloniusMonocloniusMonoclonius was a ceratopsian dinosaur from the Judith River Formation of Late Cretaceous Montana and Canada. It is often confused with Centrosaurus, a similar genus of ceratopsian . Monoclonius was described by Edward Drinker Cope in 1876...
- MonolophosaurusMonolophosaurusMonolophosaurus was a genus of theropod dinosaur from the Middle Jurassic of the Shishugou Formation in what is now Xinjiang, China. It was named for the single crest on top of its skull. The type and only known individual is estimated at...
- "Mononychus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as MononykusMononykusMononykus was a theropod dinosaur from late Cretaceous Mongolia with long, skinny legs. It moved about on two legs, was very nimble, and could run at high speeds, something that would have been useful in the open desert plains where it lived... - MononykusMononykusMononykus was a theropod dinosaur from late Cretaceous Mongolia with long, skinny legs. It moved about on two legs, was very nimble, and could run at high speeds, something that would have been useful in the open desert plains where it lived...
- MontanoceratopsMontanoceratopsMontanoceratops was a genus of small ceratopsian dinosaur. It lived during the early Maastrichtian of the late Cretaceous Period...
- MorinosaurusMorinosaurusMorinosaurus was a genus of sauropod dinosaur from an unnamed formation of Kimmeridgian-age Upper Jurassic rocks from Boulogne-sur-Mer, Départment du Pas-de-Calais, France...
- Morosaurus – junior synonym of CamarasaurusCamarasaurusCamarasaurus meaning 'chambered lizard', referring to the hollow chambers in its vertebrae was a genus of quadrupedal, herbivorous dinosaurs. It was the most common of the giant sauropods to be found in North America...
- "Moshisaurus" – nomen nudum; ?MamenchisaurusMamenchisaurusMamenchisaurus was a plant-eating four-legged dinosaur, known for its remarkably long neck which made up half its total length. It is known from numerous species which ranged in time from 160 to 145 million years ago, from the Oxfordian to Tithonian ages of the late Jurassic Period of...
- "Mtapaiasaurus" – nomen nudum, probably BrachiosaurusBrachiosaurusBrachiosaurus is a genus of sauropod dinosaur from the Jurassic Morrison Formation of North America. It was first described by Elmer S. Riggs in 1903 from fossils found in the Grand River Canyon of western Colorado, in the United States. Riggs named the dinosaur Brachiosaurus altithorax,...
or Giraffatitan - "Mtotosaurus" – nomen nudum; DicraeosaurusDicraeosaurusDicraeosaurus is a genus of small diplodocoid sauropod dinosaur. It was named for the spines on the back of the neck. The first fossil was described by paleontologist Werner Janensch in 1914.Unlike most diplodocoids, Dicraeosaurus had a large head with a relatively short and wide neck...
- MussaurusMussaurusMussaurus was a genus of herbivorous prosauropod dinosaur that lived in southern Argentina during the Late Triassic Period, about 215 million years ago...
- MuttaburrasaurusMuttaburrasaurusMuttaburrasaurus is a genus of herbivorous ornithopod dinosaur, living in what is now northeastern Australia between 100 and 98 million years ago during the early Cretaceous Period. It has been recovered in some analyses as a member of the iguanodontian family Rhabdodontidae...
- MuyelensaurusMuyelensaurusMuyelensaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous of Argentina. It was more slender than other titanosaurs. Fossils have been recovered from the Neuquén province in Patagonia. The type species is M. pecheni...
- MymoorapeltaMymoorapeltaMymoorapelta is an ankylosaur from the Late Jurassic Morrison Formation of western Colorado. The taxon is known from portions of a disarticulated skull, parts of three different skeletons and other postcranial remains...
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- NaashoibitosaurusNaashoibitosaurusNaashoibitosaurus is a genus of hadrosaurid dinosaur that lived about 73 million years ago, in the Late Cretaceous, and was found in the Kirtland Formation of the San Juan Basin in New Mexico, United States. Only a partial skeleton has been found to date...
- NambaliaNambaliaNambalia is a genus of basal sauropodomorph dinosaur. It lived during the Late Triassic period in what is now Andhra Pradesh, central India...
- NanningosaurusNanningosaurusNanningosaurus is a genus of hadrosaurid dinosaur from the late Cretaceous of the Nalong Basin, Guangxi, China. It is based on an incomplete skeleton including skull, arm, and hip remains. Some of its diagnostic characteristics include relatively few tooth positions, a gracile upper arm, and an...
- NanosaurusNanosaurusNanosaurus is the name given to a genus of dinosaur from the Late Jurassic. Described by Othniel Charles Marsh in 1877, it is a poorly-known ornithischian of uncertain affinities. Its fossils are known from the Morrison Formation of Colorado and possibly Wyoming...
- Nanotyrannosaurus – a misspelling of NanotyrannusNanotyrannusNanotyrannus is a genus of tyrannosaurid dinosaur, known only from two juvenile specimens, which may in fact represent juvenile specimens of the contemporary species Tyrannosaurus rex.-History:...
- NanotyrannusNanotyrannusNanotyrannus is a genus of tyrannosaurid dinosaur, known only from two juvenile specimens, which may in fact represent juvenile specimens of the contemporary species Tyrannosaurus rex.-History:...
– possibly a juvenile TyrannosaurusTyrannosaurusTyrannosaurus meaning "tyrant," and sauros meaning "lizard") is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex , commonly abbreviated to T. rex, is a fixture in popular culture. It lived throughout what is now western North America, with a much wider range than other...
or other tyrannosaurid - NanshiungosaurusNanshiungosaurusNanshiungosaurus is a genus of therizinosaurian theropod dinosaur from the Cretaceous of China.Two species have been named in the genus: the type species Nanshiungosaurus brevispinus and Nanshiungosaurus bohlini.-Discovery and naming:...
- NanyangosaurusNanyangosaurusNanyangosaurus is a genus of herbivorous ornithischian dinosaur from the Early Cretaceous. It was an iguanodont which lived in the area of present-day China....
- NarambuenatitanNarambuenatitanNarambuenatitan is a genus of lithostrotian titanosaur sauropod from late Cretaceous deposits of northern Patagonia of Argentina. Narambuenatitan is known from the holotype MAU-Pv-N-425, an incomplete skeleton. It was collected in 2005 and 2006 from the Anacleto Formation in northern Patagonia....
- "NectosaurusNectosaurusNectosaurus is a genus of marine diapsid reptile which lived during the Late Triassic of what is now California. The type species is N. halinus, described by John C. Merriam in 1905. A 2002 analysis of Nectosaurus classifies it as a thalattosaurian, one of a group of marine reptiles which lived...
" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as KritosaurusKritosaurusKritosaurus is an incompletely known but historically important genus of hadrosaurid dinosaur. It lived about 73 million years ago, in the Late Cretaceous of North America... - NedcolbertiaNedcolbertiaNedcolbertia is a genus of dinosaur from the Early Cretaceous Period. It was a coelurosaur which lived in North America during the Barremian. Kirkland, Britt, Madsen and Burge in 1995 reported its discovery in the basal Cedar Mountain Formation in Utah. The type species, N...
- Nedoceratops
- NeimongosaurusNeimongosaurusNeimongosaurus is a genus of herbivorous therizinosaur theropod dinosaur known from the Upper Cretaceous of Nei Mongol, China....
- "Nemegtia" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as NemegtomaiaNemegtomaiaNemegtomaia is a genus of oviraptorid dinosaur from the late Cretaceous Period of what is now Mongolia. The type species, Nemegtomaia barsboldi, was described by Lü, Tomida, Azuma, Dong, and Lee in 2004... - NemegtomaiaNemegtomaiaNemegtomaia is a genus of oviraptorid dinosaur from the late Cretaceous Period of what is now Mongolia. The type species, Nemegtomaia barsboldi, was described by Lü, Tomida, Azuma, Dong, and Lee in 2004...
- NemegtosaurusNemegtosaurusNemegtosaurus was a sauropod dinosaur from Late Cretaceous Period of what is now Mongolia. It was named after the Nemegt Basin in the Gobi Desert, where the remains — a single skull — were found...
- "Neosaurus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as Parrosaurus (possible junior synonym of HypsibemaHypsibemaHypsibema is a little-known genus of dinosaur from the Late Cretaceous . Its giant fossils were found in the U.S. states of North Carolina and Missouri...
) - NeosodonNeosodonNeosodon was a genus of sauropod dinosaur from the Late Tithonian-age Upper Jurassic Sables et Grès à Trigonia gribosa of Départment du Pas-de-Calais, France. It has never been formally given a species name, but is often seen as N. praecursor, which actually comes from a different animal...
- NeovenatorNeovenatorNeovenator is a genus of allosauroid dinosaur. Since its discovery on the Isle of Wight, UK, it has become one of the best-known large carnivorous dinosaurs in Europe. Neovenator was at first considered possibly a new species of Megalosaurus. It measured approximately 7.5 meters in length,...
- NeuquenraptorNeuquenraptorNeuquenraptor is a dromaeosaurid theropod dinosaur of the Late Cretaceous of Argentina, one of the first dromaeosaurids found in the Southern Hemisphere....
- NeuquensaurusNeuquensaurusNeuquensaurus is a genus of saltasaurid sauropod dinosaur that appeared in the Late Cretaceous, 71 million years ago in Argentina and Uruguay in South America...
- "NewtonsaurusNewtonsaurus"Newtonsaurus" is the informal name given to an as yet undescribed genus of dinosaur from the Late Triassic. It was probably a ceratosaur, which lived in what is now the United Kingdom. The type species is "N...
" – nomen nudum - "NgexisaurusNgexisaurus"Ngexisaurus" is the informal name given to an as yet undescribed genus of dinosaur from the Middle Jurassic. It was a coelurosaur which lived in what is now China. The type species, "Ngexisaurus dapukaensis", was coined by Zhao in 1983...
" – nomen nudum - NigersaurusNigersaurusNigersaurus is a genus of diplodocoid sauropod dinosaur from the middle Cretaceous period, about 119 to 99 million years ago during the Aptian or Albian age. This dinosaur was described by Paul Sereno and colleagues in 1999...
- "Ninghsiasaurus" – nomen nudum; PinacosaurusPinacosaurusPinacosaurus is a genus of medium-sized ankylosaur dinosaurs that lived from the late Santonian to the late Campanian stages of the late Cretaceous Period , in Mongolia and China...
- NiobrarasaurusNiobrarasaurusNiobrarasaurus is an extinct genus of nodosaurid ankylosaur which lived during the Cretaceous 87 to 82 million years ago. Its fossils were found in the Smoky Hill Chalk Member of the Niobrara Formation, in western Kansas, which would have been near the middle of Western Interior Sea during the...
- NipponosaurusNipponosaurusNipponosaurus is a lambeosaurine hadrosaurid from Asia.The holotype was discovered in November 1934 during the construction of a hospital for the Kawakami colliery of the Mitsui Mining Company on Karafuto Prefecture , and additional material belonging to the specimen was recovered...
- NoasaurusNoasaurusNoasaurus is the name given to a carnivorous dinosaur genus of the late Campanian-Maastrichtian...
- NodocephalosaurusNodocephalosaurusNodocephalosaurus is a genus of herbivorous ankylosaurine ankylosaurid dinosaur from Upper Cretaceous deposits of San Juan Basin, New Mexico. The holotype was recovered from the Late Campanian De-na-zin Member of the Kirtland Formation and consists of an incomplete skull...
- NodosaurusNodosaurusNodosaurus was a genus of herbivorous ankylosaurian dinosaur from the Late Cretaceous, the fossils of which are found in North America. Two incomplete specimens have been discovered in Wyoming and Kansas, and no skulls...
- NomingiaNomingiaNomingia is a genus of oviraptorid theropod dinosaur hailing from the Late Cretaceous Bugin Tsav Beds of Mongolia.-Discovery and naming:...
- NopcsaspondylusNopcsaspondylusNopcsaspondylus is a genus of rebbachisaurid sauropod dinosaur from the Coniacian-age Candeleros Formation of Neuquén, Argentina. It is based on a now-lost back vertebra described by Nopcsa in 1902 but not named at the time...
- NothronychusNothronychusNothronychus is a genus of theropod dinosaur classified in the group Therizinosauria, from the Cretaceous of North America.The type species of this dinosaur, Nothronychus mckinleyi, was described by James Kirkland and Douglas G. Wolfe in 2001...
- NotoceratopsNotoceratopsNotoceratops is the name given to a dubious genus of dinosaur based on a toothless dentary from the Late Cretaceous of Patagonia , probably dating from the Campanian and about 77 million years old.-Discovery and naming:In 1918 Augusto Tapia named the type species Notoceratops Bonarellii...
- NotohypsilophodonNotohypsilophodonNotohypsilophodon was a genus of hypsilophodont ornithopod dinosaur. It was described as the only hypsilophodont known from South America, although this assessment is not universally supported, and Gasparinisaura is now believed to have been a hypsilophodont as well...
- "Nouerosaurus" – variant spelling of NurosaurusNurosaurus"Nurosaurus" Nur - o - Saw - rus, meaning "Nur lizard") is the informal name for a genus of sauropod dinosaur from the Cretaceous of Inner Mongolia, China. It is known from a partial skeleton that has often been seen in traveling exhibitions under various misspellings. "Nurosaurus" had a length...
- NqwebasaurusNqwebasaurusNqwebasaurus is the name given to a genus of dinosaur from the Tithonian to Valanginian . It was a basal coelurosaur related to Ornitholestes. Its fossils were found in South Africa in the Kirkwood Formation, which is called Nqweba in the native language of the Xhosa...
- "Nteregosaurus" – nomen nudum; JanenschiaJanenschiaJanenschia was a large sauropod from Late Jurassic Africa , and therefore the earliest known titanosaur. Originally thought to be a species of the diplodocid Tornieria/Barosaurus , it was later found to be a distantly related titanosaur. So far, it is only known from Tanzania...
- "Nuoerosaurus" – variant spelling of NurosaurusNurosaurus"Nurosaurus" Nur - o - Saw - rus, meaning "Nur lizard") is the informal name for a genus of sauropod dinosaur from the Cretaceous of Inner Mongolia, China. It is known from a partial skeleton that has often been seen in traveling exhibitions under various misspellings. "Nurosaurus" had a length...
- "Nuoersaurus" – variant spelling of NurosaurusNurosaurus"Nurosaurus" Nur - o - Saw - rus, meaning "Nur lizard") is the informal name for a genus of sauropod dinosaur from the Cretaceous of Inner Mongolia, China. It is known from a partial skeleton that has often been seen in traveling exhibitions under various misspellings. "Nurosaurus" had a length...
- "NurosaurusNurosaurus"Nurosaurus" Nur - o - Saw - rus, meaning "Nur lizard") is the informal name for a genus of sauropod dinosaur from the Cretaceous of Inner Mongolia, China. It is known from a partial skeleton that has often been seen in traveling exhibitions under various misspellings. "Nurosaurus" had a length...
" – nomen nudum - NuthetesNuthetesNuthetes is the name given to a dubious, possibly dromaeosaurid, genus of theropod dinosaur, known only from fossil teeth and jaw fragments found in rocks of the middle Berriasian age in the Cherty Freshwater Member of the Lulworth Formation in England...
- "NyasasaurusNyasasaurus"Nyasasaurus" is the informal name given to an as yet undescribed genus of reptile from the Triassic, first published in English paleontologist Alan J. Charig's doctoral dissertation in the 1950s. Occasionally misspelled as "Nyasaurus", it was originally believed to have been a primitive...
" – nomen nudum; possibly non-dinosaurian - "Nyororosaurus" – nomen nudum; DicraeosaurusDicraeosaurusDicraeosaurus is a genus of small diplodocoid sauropod dinosaur. It was named for the spines on the back of the neck. The first fossil was described by paleontologist Werner Janensch in 1914.Unlike most diplodocoids, Dicraeosaurus had a large head with a relatively short and wide neck...
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- OhmdenosaurusOhmdenosaurusOhmdenosaurus is the name given to a genus of herbivorous dinosaur from the Early Jurassic. It was a very small perhaps vulcanodontid sauropod which lived in Germany...
- OjoceratopsOjoceratopsOjoceratops is a genus of ceratopsian dinosaur which lived in what is now New Mexico. Ojoceratops fossils have been recovered from strata of the Ojo Alamo Formation , dating to the late Cretaceous period . The type species is Ojoceratops fowleri...
- OjoraptorsaurusOjoraptorsaurusOjoraptorsaurus is a genus of oviraptorosaurian dinosaur from the late Cretaceous. Ojoraptorsaurus is known from the holotype SMP VP-1458 an incomplete pair of fused pubes found at the Naashoibito Member of the Ojo Alamo Formation dating from the early Maastrichtian, about 69 million years...
- Oligosaurus – junior synonym of RhabdodonRhabdodonRhabdodon is a genus of dinosaur that lived in Europe approximately 70 million years ago in the Late Cretaceous. It is unclear whether it was an iguanodont or a hypsilophodont, and may be a "missing link" between the two. Current evidence indicates it is an iguanodont similar to Tenontosaurus...
- OlorotitanOlorotitanOlorotitan was a genus of lambeosaurine duckbilled dinosaur from the middle or latest Maastrichtian-age Late Cretaceous Tsagayan Formation beds located in Kundur, Amur Region, Far Eastern Russia. The remains, consisting of a nearly complete skeleton, were described by Pascal Godefroit et al. in...
- OmeisaurusOmeisaurusOmeisaurus is a genus of sauropod dinosaur from the Middle Jurassic Period of what is now China. Its name comes from Mount Emei, where it was discovered in the lower Shaximiao Formation of Sichuan Province.Like other sauropods, Omeisaurus was herbivorous and large...
- OmnivoropteryxOmnivoropteryxOmnivoropteryx is a genus of primitive flying bird from the early Cretaceous Upper Jiufotang Formation of China...
- probably a birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from... - "Omosaurus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as DacentrurusDacentrurusDacentrurus , originally known as Omosaurus, was a large stegosaur of the Late Jurassic Period .-Description:... - Onychosaurus – synonym of RhabdodonRhabdodonRhabdodon is a genus of dinosaur that lived in Europe approximately 70 million years ago in the Late Cretaceous. It is unclear whether it was an iguanodont or a hypsilophodont, and may be a "missing link" between the two. Current evidence indicates it is an iguanodont similar to Tenontosaurus...
, or a dubious ankylosauriaAnkylosauriaAnkylosauria is a group of herbivorous dinosaurs of the order Ornithischia. It includes the great majority of dinosaurs with armor in the form of bony osteoderms. Ankylosaurs were bulky quadrupeds, with short, powerful limbs. They are first known to have appeared in the early Jurassic Period of...
n - OpisthocoelicaudiaOpisthocoelicaudiaOpisthocoelicaudia was 12-metre-long sauropod dinosaur of the Late Cretaceous Period discovered in Mongolia in 1965 by Polish and Mongolian scientists in what is now the Gobi Desert...
- OplosaurusOplosaurusOplosaurus was a genus of sauropod dinosaur from the Barremian-age Lower Cretaceous Wessex Formation of the Isle of Wight, England...
- "OrcomimusOrcomimus"Orcomimus" is the name given to an as yet undescribed genus of dinosaur from the Late Cretaceous period around 84–65 million years ago. The dinosaur was an ornithomimid which lived in what is now South Dakota, in the United States...
" – nomen nudum - OrinosaurusEuskelosaurusEuskelosaurus was a semi-bipedal dinosaur from the Late Triassic. It was a prosauropod that lived in the Late Triassic Period, in present-day South Africa, Lesotho, and Zimbabwe. It was first described by Thomas Henry Huxley in 1866 as Euskelesaurus brownii based on holotype BMNH R1625, limb and...
– junior synonym (unneeded replacement name) of OrosaurusEuskelosaurusEuskelosaurus was a semi-bipedal dinosaur from the Late Triassic. It was a prosauropod that lived in the Late Triassic Period, in present-day South Africa, Lesotho, and Zimbabwe. It was first described by Thomas Henry Huxley in 1866 as Euskelesaurus brownii based on holotype BMNH R1625, limb and... - OrkoraptorOrkoraptorOrkoraptor is a genus of large theropod dinosaur from the late Cretaceous Period of Argentina. It is known from incomplete fossil remains including parts of the skull, teeth, tail vertebrae, and a partial tibia. The specialized teeth resemble those of some maniraptoriform theropods, namely the...
- Ornatotholus
- OrnithodesmusOrnithodesmusOrnithodesmus is a genus of small, deinonychosaurian dinosaur from the Isle of Wight in England, dating to about 125 million years ago. The name was originally assigned to a bird-like sacrum , initially believed to come from a pterosaur...
- "Ornithoides" – nomen nudum; SaurornithoidesSaurornithoidesSaurornithoides is a genus of troodontid maniraptoran dinosaur, living during the Late Cretaceous period. These creatures were predators, which could run fast on their hind legs and had excellent sight and hearing...
- OrnitholestesOrnitholestesOrnitholestes was a small theropod dinosaur of the late Jurassic of Western Laurasia . To date, it is known only from a single partial skeleton, and badly crushed skull found at the Bone Cabin Quarry near Medicine Bow, Wyoming, in 1900...
- Ornithomerus – junior synonym of RhabdodonRhabdodonRhabdodon is a genus of dinosaur that lived in Europe approximately 70 million years ago in the Late Cretaceous. It is unclear whether it was an iguanodont or a hypsilophodont, and may be a "missing link" between the two. Current evidence indicates it is an iguanodont similar to Tenontosaurus...
- OrnithomimoidesOrnithomimoidesOrnithomimoides is a dubious genus of small theropod dinosaur, from the Late Cretaceous period of India. Two species have been identified, though they are known only from isolated vertebrae. O. barasimlensis is known from five dorsal vertebrae, and O. mobilis from four smaller vertebrae, found at...
- OrnithomimusOrnithomimusOrnithomimus is a genus of ornithomimid dinosaur from the Late Cretaceous Period of what is now North America.In 1890 Ornithomimus velox was named by Othniel Charles Marsh on the basis of a foot and partial hand from the Maastrichtian Denver Formation. Another seventeen species have been named since...
- OrnithopsisOrnithopsisOrnithopsis was a medium-sized Early Cretaceous sauropod dinosaur, from England. It has been considered a synonym of the wastebasket taxon Pelorosaurus, but recent research suggests that this is not as clear-cut as supposed...
- OrnithosuchusOrnithosuchusOrnithosuchus is an extinct genus of crurotarsan from the Late Triassic Lossiemouth Sandstone of Scotland...
– actually a non-dinosaurian archosaurArchosaurArchosaurs are a group of diapsid amniotes whose living representatives consist of modern birds and crocodilians. This group also includes all extinct non-avian dinosaurs, many extinct crocodilian relatives, and pterosaurs. Archosauria, the archosaur clade, is a crown group that includes the most... - Ornithotarsus – possible junior synonym of HadrosaurusHadrosaurusHadrosaurus is a valid genus of hadrosaurid dinosaur. In 1858, a skeleton of a dinosaur from this genus was the first dinosaur skeleton known from more than isolated teeth to be found in North America. In 1868, it became the first ever mounted dinosaur skeleton...
- OrodromeusOrodromeusOrodromeus is a genus of herbivorous ornithopod dinosaur from the Late Cretaceous of North America.-Discovery and naming:...
- Orosaurus – possible junior synonym of EuskelosaurusEuskelosaurusEuskelosaurus was a semi-bipedal dinosaur from the Late Triassic. It was a prosauropod that lived in the Late Triassic Period, in present-day South Africa, Lesotho, and Zimbabwe. It was first described by Thomas Henry Huxley in 1866 as Euskelesaurus brownii based on holotype BMNH R1625, limb and...
- OrthogoniosaurusOrthogoniosaurusOrthogoniosaurus was a genus of theropod dinosaur from the late Maastrichtian-age Upper Cretaceous Lameta Formation of Jabalpur, India...
- OrthomerusOrthomerusOrthomerus is a genus of duckbill dinosaur from the Late Cretaceous of The Netherlands, Belgium and possibly Ukraine. It is today an obscure genus, but in the past was conflated with the much better known Telmatosaurus....
- OryctodromeusOryctodromeusOryctodromeus was a genus of small ornithopod dinosaur. Fossils are known from the middle Cretaceous Blackleaf Formation of southwestern Montana and the Wayan Formation of southeastern Idaho, both of the Cenomanian stage, roughly 95 million years ago...
- "OshanosaurusOshanosaurus"Oshanosaurus" is the informal name given to an as yet undescribed genus of sauropod dinosaur from the Early Jurassic period of Yunnan, China. Its fossils were found in the Lower Lufeng Series. The intended "type species", "Oshanosaurus youngi", was coined by Zhao in 1985...
" – nomen nudum - OsmakasaurusOsmakasaurusOsmakasaurus is a genus of herbivorous iguanodontian dinosaur. It is a basal iguanodontian which lived during the lower Cretaceous period in what is now Buffalo Gap of South Dakota, USA. It is known from the Chilson Member of the Lakota Formation. This genus was named by Andrew T. McDonald in 2011...
- OthnieliaOthnieliaOthnielia is a genus of ornithischian dinosaur, named after its original describer, Professor Othniel Charles Marsh, an American paleontologist of the 19th century...
- OthnielosaurusOthnielosaurusOthnielosaurus is a genus of ornithischian dinosaur that lived about 155 to 148 million years ago, during the Late Jurassic-age Morrison Formation of the western United States. It is named in honor of famed paleontologist Othniel Charles Marsh, and was formerly assigned to the genus...
- "OtogosaurusOtogosaurusOtogosaurus is a genus of sauropod dinosaur. The most notable species in this genus is Otogosaurus sarulai. This species was first described by Chinese scientist Zhao in 2004. The species is named after Otog, the location of its discovery, and the Sarula, who are the indigenous peoples who live in...
" – nomen nudum - OuranosaurusOuranosaurusOuranosaurus is an unusual genus of herbivorous iguanodont dinosaur that lived during the early Cretaceous about 110 million years ago in what is now Africa. Ouranosaurus measured about seven to eight meters long...
- OviraptorOviraptorOviraptor is a genus of small Mongolian theropod dinosaur, first discovered by the paleontologist Roy Chapman Andrews, and first described by Henry Fairfield Osborn, in 1924...
- "Ovoraptor" – nomen nudum; VelociraptorVelociraptorVelociraptor is a genus of dromaeosaurid theropod dinosaur that existed approximately 75 to 71 million years ago during the later part of the Cretaceous Period. Two species are currently recognized, although others have been assigned in the past. The type species is V. mongoliensis; fossils...
- OwenodonOwenodonOwenodon is a genus of iguanodontian dinosaur known from a partial lower jaw discovered in Early Cretaceous-age rocks of Durlston Bay, Dorset, United Kingdom. The specimen, NHM R2998, comes from the Purbeck Limestone, dating to the middle Berriasian stage...
- OxalaiaOxalaiaOxalaia is a genus of carnivorous theropod. It is a spinosaurine spinosaurid which lived during the late Cretaceous in what is now Brazil....
- OzraptorOzraptorOzraptor is an abelisauroid theropod dinosaur from the Middle Jurassic Colalura Sandstone of Australia.In 1967 a group of four twelve-year-old Scotch College schoolboys found a fossil at the Bringo Railway Cutting site near Geraldton, which they showed to Professor Rex Prider of the University of...
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- PachycephalosaurusPachycephalosaurusPachycephalosaurus is a genus of pachycephalosaurid dinosaur. It lived during the Late Cretaceous Period of what is now North America. Remains have been excavated in Montana, South Dakota, and Wyoming. It was an herbivorous or omnivorous creature which is only known from a single skull and a few...
- PachyrhinosaurusPachyrhinosaurusPachyrhinosaurus is a genus of ceratopsid dinosaurs from the Late Cretaceous period of North America. The first examples were discovered by Charles M. Sternberg in Alberta, Canada, in 1946, and named in 1950. Over a dozen partial skulls and a large assortment of other fossils from various species...
- Pachysauriscus – probable junior synonym of PlateosaurusPlateosaurusPlateosaurus is a genus of plateosaurid dinosaur that lived during the Late Triassic period, around 216 to 199 million years ago, in what is now Central and Northern Europe. Plateosaurus is a basal sauropodomorph dinosaur, a so-called "prosauropod"...
- Pachysaurops – probable junior synonym of PlateosaurusPlateosaurusPlateosaurus is a genus of plateosaurid dinosaur that lived during the Late Triassic period, around 216 to 199 million years ago, in what is now Central and Northern Europe. Plateosaurus is a basal sauropodomorph dinosaur, a so-called "prosauropod"...
- "Pachysaurus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as Pachysauriscus; probable junior synonym of PlateosaurusPlateosaurusPlateosaurus is a genus of plateosaurid dinosaur that lived during the Late Triassic period, around 216 to 199 million years ago, in what is now Central and Northern Europe. Plateosaurus is a basal sauropodomorph dinosaur, a so-called "prosauropod"... - Pachyspondylus – probable junior synonym of MassospondylusMassospondylusMassospondylus and ) is a genus of prosauropod dinosaur from the early Jurassic Period . It was described by Sir Richard Owen in 1854 from remains found in South Africa, and is thus one of the first dinosaurs to have been named...
- PakisaurusPakisaurusPakisaurus is a genus of titanosaurian sauropod from the Late Cretaceous of Balochistan, western Pakistan. The type species is P. balochistani, described by M. Sadiq Malkani in 2006, and it is based on four tail vertebrae, found in the Maastrichtian-age Vitakri Member of the Pab Formation. Three...
- PalaeoctonusPalaeoctonusPalaeoctonus is a genus of archosaur known only from isolated teeth. The genus includes the species P. appalachianus, P. aulacodus, P. cyphodon, P. dumblianus, and P. orthodon. The name is derived from Greek...
– actually a phytosaurPhytosaurPhytosaurs are an extinct group of large semi-aquatic Late Triassic archosaurs. Phytosaurs belong to the family Phytosauridae and the order Phytosauria. They were long-snouted and heavily armoured, bearing a remarkable resemblance to modern crocodiles in size, appearance, and lifestyle, an example... - PalaeocursornisPalaeocursornisPalaeocursornis is a monotypic genus of prehistoric bird. The species P. corneti, described in 1984, was initially assumed to be a flightless paleognathe, possibly a ratite, but it may actually be more primitive and not even a neornithine but an ornithuromorph bird or indeed not a bird at all...
– possibly a birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from... - "Palaeolimnornis" – nomen nudum; PalaeocursornisPalaeocursornisPalaeocursornis is a monotypic genus of prehistoric bird. The species P. corneti, described in 1984, was initially assumed to be a flightless paleognathe, possibly a ratite, but it may actually be more primitive and not even a neornithine but an ornithuromorph bird or indeed not a bird at all...
, probable bird - PalaeopteryxPalaeopteryxPalaeopteryx is a genus of theropod dinosaur now considered a nomen dubium. It was named and misidentified by J. A. Jensen in 1981, then redescribed by Jensen and K. Padian in 1989. At that time the binomial Palaeopteryx thomsoni was deemed invalid by Jensen...
– possibly a birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from... - PalaeosauriscusPalaeosauriscusPalaeosauriscus is a name that has been given to several different genera of reptiles between 1843 and 1959.Palaeosauriscus fraserianus, described by Edward Drinker Cope in 1878, is a nomen dubium included with Anchisaurus polyzelus. P. diagnosticus is a juvenile Sellosaurus. "P...
– junior synonym of Paleosaurus - "PalaeosaurusPalaeosaurusSeveral very different genera of prehistoric animals have been named Palaeosaurus or Paleosaurus since the 1830s. Further confusing the matter, all of the species are poorly known or poorly preserved and both spellings have been used interchangeably, even by the same authors.The repeated recurrence...
" Riley & Stutchbury, 1836 – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as Paleosaurus - "PalaeosaurusSphenosaurusSphenosaurus is a poorly known genus of procolophonid, a type of prehistoric reptile from the Permian. Originally assigned the name Palaeosaurus sternbergii, by...
" Fitzinger, 1840 – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as SphenosaurusSphenosaurusSphenosaurus is a poorly known genus of procolophonid, a type of prehistoric reptile from the Permian. Originally assigned the name Palaeosaurus sternbergii, by...
, a non-dinosaurian procolophonidProcolophonidThe Procolophonids - family Procolophonidae - are a group of small reptiles. Skulls have been discovered, roughly 5 cm in diameter.... - PalaeoscincusPalaeoscincusPalaeoscincus is a dubious genus of ankylosaurian dinosaur based on teeth from the mid-late Campanian-age Upper Cretaceous Judith River Formation of Montana...
- Paleosaurus – actually a non-dinosaurian archosaurArchosaurArchosaurs are a group of diapsid amniotes whose living representatives consist of modern birds and crocodilians. This group also includes all extinct non-avian dinosaurs, many extinct crocodilian relatives, and pterosaurs. Archosauria, the archosaur clade, is a crown group that includes the most...
- PaludititanPaludititanPaludititan is a genus of titanosaurian dinosaur which existed in what is now Haţeg Basin, Romania during the late Cretaceous period. The type species is Paludititan nalatzensis, after its finding place Nǎlaţ-Vad. The type species was determined and described by Zoltán Csiki, Vlad Codrea, Cǎtǎlin...
- PaluxysaurusPaluxysaurusPaluxysaurus is a genus of basal titanosauriform sauropod dinosaur from the late Aptian or early Albian-age Lower Cretaceous Twin Mountains Formation of Hood County, Texas, USA...
- PampadromaeusPampadromaeusPampadromaeus is an extinct genus of basal sauropodomorph dinosaurs known from the Triassic of Rio Grande do Sul, southern Brazil.-Discovery:...
- PamparaptorPamparaptorPamparaptor is an extinct genus of carnivorous deinonychosaur from the late Cretaceous period. It is a basal dromaeosaurid with troodontid-like pes which lived during the late Cretaceous period in what is now Neuquén province, Patagonia, Argentina. It is known from the holotype MUCPv-1163, an...
- PanamericansaurusPanamericansaurusPanamericansaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous Period of what is now South America. It is very similar to the closely related Aeolosaurus, differing only in details of the vertebrae....
- PanoplosaurusPanoplosaurusPanoplosaurus is a genus of nodosaurid dinosaur. It was one of the last known nodosaurids, living during the Late Cretaceous in what is now North America; fossils have been located in Alberta, Canada....
- PanphagiaPanphagiaPanphagia is a genus of sauropodomorph dinosaur described in 2009. It lived 231 million years ago, during the late Ladinian age of the mid Triassic period , in what is now northwestern Argentina...
- PantydracoPantydracoPantydraco was a genus of basal sauropodomorph dinosaur from the Late Triassic of United Kingdom...
- "Paraiguanodon" – nomen nudum; BactrosaurusBactrosaurusBactrosaurus is a genus of herbivorous dinosaur that lived in east China during the late Cretaceous, about 70 mya. The position Bactrosaurus occupies in the Cretaceous makes it one of the earliest known hadrosaurs, and although it is not known from a full skeleton, Bactrosaurus is one of the best...
- ParalititanParalititanParalititan was a giant titanosaurian sauropod dinosaur genus discovered in coastal deposits in the Upper Cretaceous Bahariya Formation of Egypt. The fossil represents the first tetrapod reported from the Bahariya Formation since 1935. Its 1.69 meter long humerus is longer than that of any...
- ParanthodonParanthodonParanthodon was a dinosaur from the early Cretaceous. It lived in what is now South Africa. It is classified as a stegosaur. It has a long and confusing history. The type species, Paranthodon africanus, comes from a partial skull first described as Palaeoscincus africanus in 1912...
- PararhabdodonPararhabdodonPararhabdodon was a genus of derived hadrosauroid or basal hadrosaurid dinosaur, from the Maastrichtian-age Upper Cretaceous Tremp Formation of Spain...
- ParasaurolophusParasaurolophusParasaurolophus is a genus of ornithopod dinosaur that lived in what is now North America during the Late Cretaceous Period, about 76.5–73 million years ago. It was an herbivore that walked both as a biped and a quadruped. Three species are recognized: P. walkeri , P. tubicen, and the...
- PareiasaurusPareiasaurusPareiasaurus is an extinct genus of anapsid reptile from the Permian period. It was a typical member of its family, the pareiasaurs, which take their name from this genus....
– actually a pareiasaurPareiasaurThe Pareiasaurs - Family Pareiasauridae - are a clade of medium-sized to large herbivorous anapsid reptiles that flourished during the Permian period.... - "Parhabdodon" – nomen nudum; misspelling of PararhabdodonPararhabdodonPararhabdodon was a genus of derived hadrosauroid or basal hadrosaurid dinosaur, from the Maastrichtian-age Upper Cretaceous Tremp Formation of Spain...
- ParksosaurusParksosaurusParksosaurus was a genus of hypsilophodont ornithopod dinosaur from the early Maastrichtian-age Upper Cretaceous Horseshoe Canyon Formation of Alberta, Canada. It is based on most of a partially articulated skeleton and partial skull, showing it to have been a small, bipedal, herbivorous dinosaur...
- ParonychodonParonychodonParonychodon was a theropod dinosaur genus. It is a tooth taxon, considered dubious because of the fragmentary nature of the fossils, which include "buckets" of teeth but no other remains...
- Parrosaurus – possible junior synonym of HypsibemaHypsibemaHypsibema is a little-known genus of dinosaur from the Late Cretaceous . Its giant fossils were found in the U.S. states of North Carolina and Missouri...
- ParvicursorParvicursorParvicursor is a genus of tiny maniraptoran dinosaur with long slender legs for fast running. At only about 39 cm from snout to end of tail, and 162 grams in weight, it is one of the smallest non-avian dinosaurs known from an adult specimen.Like other members of the family Alvarezsauridae,...
- PatagonykusPatagonykusPatagonykus is a genus of theropod dinosaur from the Upper Cretaceous of Argentina. This alvarezsaur was discovered in exposures of the Portezuelo Member of the Rio Neuquen Formation in the Neuquen Province of Argentina...
- PatagosaurusPatagosaurusPatagosaurus was a large herbivorous dinosaur from the long-necked group Sauropoda. It reached a length of 18 meters. Similar to other primitive eusauropods, it was rather heavily built and similar to Cetiosaurus in general appearance. It is known from a dozen individuals, though some referred...
- "PatricosaurusPatricosaurus"Patricosaurus" is the name given to a dubious and chimeric genus of reptile from the Early Cretaceous. It is based on a femur and sacrum from two animals: the femur from a large lepidosaur, and the sacrum from an archosaur . There is no evidence for "it" being a theropod dinosaur, as it is...
" – actually a chimeraChimera (paleontology)In paleontology, a chimera is a fossil which was reconstructed with elements coming from more than a single species of animal. A now classic example of chimera is Protoavis.-List of paleontological chimeras:*Brontosaurus*Lametasaurus...
of various non-dinosaurian reptileReptileReptiles are members of a class of air-breathing, ectothermic vertebrates which are characterized by laying shelled eggs , and having skin covered in scales and/or scutes. They are tetrapods, either having four limbs or being descended from four-limbed ancestors...
s - PawpawsaurusPawpawsaurusPawpawsaurus, meaning "Pawpaw Lizard", is a nodosaurid ankylosaur from the Cretaceous of Tarrant County, Texas, discovered in May 1992. The only species yet assigned to this taxon, Pawpawsaurus campbelli, is based on a complete skull from the marine Paw Paw Formation...
- Pectinodon – junior synonym of TroodonTroodonTroodon is a genus of relatively small, bird-like dinosaur from the Late Cretaceous period . Discovered in 1855, it was among the first dinosaurs found in North America...
- PedopennaPedopennaPedopenna is a genus of small, feathered, maniraptoran dinosaur from the Daohugou Beds in China. It is possibly older than Archaeopteryx, though the age of the Daohugou Beds where it was found is debated...
- PeishansaurusPeishansaurusPeishansaurus was a genus of plant-eating dinosaur that lived during the Late Cretaceous period , roughly 97.5-65 million years ago....
- PekinosaurusPekinosaurusPekinosaurus is the name given to a genus of pseudosuchian from the Late Triassic. This prehistoric reptile lived in what is now North Carolina, in the United States. The type species, P. olseni, was described by Hunt and Lucas in 1994, based on fossils found in Pekin, North Carolina, whence the...
– actually a pseudosuchiaPseudosuchiaPseudosuchia is the name originally given to a group of prehistoric reptiles from the Triassic period. The name has been variously interpreted, and it is still sometimes, if infrequently, used in scientific literature today. A more commonly used name, Crurotarsi, is often substituted for...
n; possibly a junior synonym of RevueltosaurusRevueltosaurusRevueltosaurus is a genus of prehistoric crurotarsan from Late Triassic New Mexico and Arizona.According to William Parker, who discovered the partial skeleton, "we have pretty much erased the record of Triassic ornithischian dinosaurs from North America, Europe and worldwide, except for South... - PelecanimimusPelecanimimusPelecanimimus is a genus of basal ornithomimosaurian theropod dinosaur from the Early Cretaceous of Spain...
- PellegrinisaurusPellegrinisaurusPellegrinisaurus is the name given to a genus of dinosaur from the Late Cretaceous. It was a titanosaur which lived in what is now Argentina. The type species, Pellegrinisaurus powelli, was described by Salgado in 1996, and is based on mostly vertebrae...
- PeloroplitesPeloroplitesPeloroplites is a genus of nodosaurid armored dinosaur from Lower Cretaceous rocks of Utah...
- PelorosaurusPelorosaurusPelorosaurus was a huge plant-eating dinosaur. Pelorosaurus was one of the first sauropod dinosaurs ever discovered. Pelorosaurus lived during the Early Cretaceous period, about 138-112 million years ago. Fossils referred to Pelorosaurus have been found in England and Portugal...
- "Peltosaurus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as SauropeltaSauropeltaSauropelta is a genus of nodosaurid dinosaur that existed in the Early Cretaceous Period of North America. One species has been named although others may have existed. Anatomically, Sauropelta is one of the most well-understood nodosaurids, with fossilized remains recovered in the U.S. states of... - PenelopognathusPenelopognathusPenelopognathus is a genus of dinosaur which lived during the Early Cretaceous. It was an iguanodont ancestral to hadrosaurids. Fossils have been found in the Bayin-Gobi Formation in what is now Mongolia...
- PentaceratopsPentaceratopsPentaceratops is a genus of ceratopsid dinosaur from the late Cretaceous Period of what is now North America. The appearance of Pentaceratops sternbergii in the fossil record marks the end of the Judithian land vertebrate age and the start of the Kirtlandian...
- PetrobrasaurusPetrobrasaurusPetrobrasaurus is a genus of herbivorous sauropod dinosaur. It is a titanosaur which lived during the upper Cretaceous period in what is now Rincón de los Sauces, Patagonia, Argentina. It is known from the holotype MAU-Pv-PH-449 — a partial disarticulated skeleton recovered from the Plottier...
- PhaedrolosaurusPhaedrolosaurusPhaedrolosaurus was a genus of theropod dinosaur, based on a single tooth possibly from the Valanginian-Albian-age Lower Cretaceous Lianmugin Formation of Wuerho, Xinjiang, China. This tooth, IVPP V 4024-1, was described by Dong Zhiming as like those of Deinonychus, albeit thicker, shorter, and...
- PhuwiangosaurusPhuwiangosaurusPhuwiangosaurus is the name given to a genus of dinosaur from the Early Cretaceous. It was a titanosaur which lived in Thailand. The type species, P. sirindhornae, was described by Martin, Buffetaut, and Suteethorn in 1994, it was named to honour Princess Maha Chakri Sirindhorn of Thailand on her...
- PhyllodonPhyllodonPhyllodon was a genus of small ornithopod dinosaur from the Kimmeridgian-age Upper Jurassic Guimarota Formation of Leiria, Portugal. It may have been closely related to contemporaneous dinosaurs in North America....
- PiatnitzkysaurusPiatnitzkysaurusPiatnitzkysaurus is a genus of theropod dinosaur. It is known from the Canadon Asfalto Formation, Middle Jurassic of what is now Argentina. Once thought to be a basal carnosaur, it may instead be a megalosauroid...
- Picrodon – junior synonym of AvalonianusAvalonianusAvalonianus is a name used for fossil teeth from the Late Triassic of England. It was first described in 1898 by Seeley with the name Avalonia, but that name was preoccupied , so Kuhn renamed it in 1961...
- PinacosaurusPinacosaurusPinacosaurus is a genus of medium-sized ankylosaur dinosaurs that lived from the late Santonian to the late Campanian stages of the late Cretaceous Period , in Mongolia and China...
- PisanosaurusPisanosaurusPisanosaurus is a genus of primitive ornithischian dinosaur from the Late Triassic of what is now South America. It was a bipedal herbivore described by Argentine paleontologist Rodolfo Casamiquela in 1967. Only one species, the type, Pisanosaurus mertii, is known, based on a single partial skeleton...
- PitekunsaurusPitekunsaurusPitekunsaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous of Neuquén, Argentina. It was described by L. Filippi and A. Garrido in 2008. The type species is P. macayai...
- PiveteausaurusPiveteausaurusPiveteausaurus is a genus of theropod dinosaur known from a partial skull discovered in the Middle Jurassic Marnes de Dives formation of Calvados, in northern France.-History and description:...
- PlanicoxaPlanicoxaPlanicoxa is a genus of advanced iguanodontian dinosaur from the Early Cretaceous of North America. It is known from the partial skeletons of several individual specimens. Its fossils were discovered in Utah and South Dakota, United States....
- PlateosauravusPlateosauravusPlateosauravus is a basal sauropodomorph of uncertain affinities from the late Triassic of South Africa....
- PlateosaurusPlateosaurusPlateosaurus is a genus of plateosaurid dinosaur that lived during the Late Triassic period, around 216 to 199 million years ago, in what is now Central and Northern Europe. Plateosaurus is a basal sauropodomorph dinosaur, a so-called "prosauropod"...
- PlatyceratopsPlatyceratopsPlatyceratops is a dinosaur from the Late Cretaceous, during the Campanian Age, about 75-72 million years ago. Its fossils have been found in Mongolia. Its skull is larger than Bagaceratops; it has been referred to Bagaceratopidae or the Neoceratopsia...
- Pleurocoelus – possibly AstrodonAstrodonAstrodon was a genus of large herbivorous sauropod dinosaur, related to Brachiosaurus, that lived in what is now the eastern United States during the Early Cretaceous period. Its fossils have been found in the Arundel Formation, which has been dated through palynomorphs to the Aptian-Albian...
- Pleuropeltus – junior synonym of StruthiosaurusStruthiosaurusStruthiosaurus is one of the smallest known and most basal genera of nodosaurid dinosaurs, from the Late Cretaceous period of Austria, Romania and France in Europe. It was protected by body armour...
- PneumatoarthrusPneumatoarthrusPneumatoarthrus is a Cretaceous sea turtle first identified by Edward Drinker Cope as a hadrosaur in 1870. The fossils were found in the chalk beds of Kansas. It may be synonymous with the better known Atlantochelys, and therefore a close relative of the giant sea turtle Archelon.-References:Baird,...
– actually a turtleTurtleTurtles are reptiles of the order Testudines , characterised by a special bony or cartilaginous shell developed from their ribs that acts as a shield... - PneumatoraptorPneumatoraptorPneumatoraptor is a genus of small, paravian dinosaur that lived in Hungary. It is known from a single complete left shoulder girdle found in the Csehbánya Formation of the Iharkút locality in the Bakony Mountains of western Hungary...
- PodokesaurusPodokesaurusPodokesaurus was a small carnivorous dinosaur of the Early Jurassic Period , and as such is one of the earliest known dinosaurs to inhabit the eastern United States . The small, bipedal carnivore was about 90 cm long and 0.3 m tall...
- PoekilopleuronPoekilopleuronPoekilopleuron is an extinct genus of large basal tetanuran theropod dinosaur, perhaps belonging to the clade Allosauroidea. It measured 9 metres long and 1 ton in mass...
- Polacanthoides – junior synonym of HylaeosaurusHylaeosaurusHylaeosaurus is the most obscure of the three animals used by Sir Richard Owen to first define the new group Dinosauria, in 1842. The original specimen, recovered by Gideon Mantell from the Tilgate Forest in the south of England in 1832, now resides in the Natural History Museum of London, where...
- PolacanthusPolacanthusPolacanthus, deriving its name from the Ancient Greek poly-/πολυ- "many" and acantha/ακανθα "thorn" or "prickle", was an early armored, spiked, plant-eating ankylosaur from the early Cretaceous period. Early depictions often gave it a very vague head as it was only known from the rear half of the...
- Polyodontosaurus – junior synonym of TroodonTroodonTroodon is a genus of relatively small, bird-like dinosaur from the Late Cretaceous period . Discovered in 1855, it was among the first dinosaurs found in North America...
- PolyonaxPolyonaxPolyonax was a genus of ceratopsid dinosaur from the late Maastrichtian-age Upper Cretaceous Denver Formation of Colorado, USA...
- PonerosteusPonerosteusPonerosteus is a dubious genus of archosaur which was first identified as "Iguanodon exogirarum" by Antonin Fritsch in 1878 for a specimen from the Cenomanian . He later renamed it Procerosaurus, unaware that this name was already in use...
- PoposaurusPoposaurusPoposaurus is a genus of reptile from the Late Triassic of the southwestern United States. It was a crurotarsan archosaur which lived in what is now Wyoming, Utah, Arizona and Texas. The type species, Poposaurus gracilis, was described by M. G. Mehl in 1915. The second species, P...
– actually a non-dinosaurian archosaurArchosaurArchosaurs are a group of diapsid amniotes whose living representatives consist of modern birds and crocodilians. This group also includes all extinct non-avian dinosaurs, many extinct crocodilian relatives, and pterosaurs. Archosauria, the archosaur clade, is a crown group that includes the most... - PostosuchusPostosuchusPostosuchus, meaning "crocodile from Post ", was a basal archosaur that lived in what is now North America during the middle through to the late Triassic period...
– actually a rauisuchiaRauisuchiaRauisuchia is a group of predatory and mostly large Triassic archosaurs. As a clade, Rauisuchia includes these Triassic forms and all crocodylomorphs, which are descendants of Triassic rauisuchians. The group in its traditional sense is paraphyletic, because it does not include crocodylomorph...
n - PradhaniaPradhaniaPradhania is a genus of massospondylid sauropodomorph dinosaur from the Sinemurian-age Upper Dharmaram Formation of India. It was first named by T. S. Kutty, Sankar Chatterjee, Peter M. Galton and Paul Upchurch in 2007 and the type species is Pradhania gracilis...
- PrenocephalePrenocephalePrenocephale was a small pachycephalosaurid dinosaur genus from the Late Cretaceous and was similar in many ways to its close relative, Homalocephale, which may simply represent Prenocephale juveniles. Adult Prenocephale probably weighed around and measured around long...
- PrenoceratopsPrenoceratopsPrenoceratops, is a genus of ceratopsian dinosaur from the Late Cretaceous Period. Its fossils have been found in the Two Medicine Formation in the present-day U.S. state of Montana...
- PriconodonPriconodonPriconodon is an extinct genus of dinosaur , known from its large teeth. Its remains have been found in the Aptian-Albian age Lower Cretaceous Arundel Formation of Muirkirk, Prince George's County, Maryland.-History:...
- PriodontognathusPriodontognathusPriodontognathus was a genus of ankylosaurian dinosaur possibly from the Oxfordian-age Upper Jurassic Lower Calcareous Grit of Yorkshire, England...
- ProbactrosaurusProbactrosaurusProbactrosaurus is an early herbivorous hadrosauroid iguanodont dinosaur. It lived in China during the Early Cretaceous period....
- Proceratops – junior synonym (unneeded replacement name) of CeratopsCeratopsCeratops is a dubious genus of ceratopsian dinosaur which lived during the Late Cretaceous. Its fossils have been found in Montana. Although poorly known, Ceratops is important in the history of dinosaurs, since it is the type species for which both Ceratopsia and Ceratopsidae are named...
- ProceratosaurusProceratosaurusProceratosaurus is a genus of small-sized carnivorous theropod dinosaur from the Middle Jurassic of England. It was originally thought to be an ancestor of Ceratosaurus, due to the similar small crest on its snout...
- ProcerosaurusProcerosaurusProcerosaurus is the name given to an invalid genus of dinosaur.There are two Procerosaurus specimens:*The first was described as P...
von Huene, 1902 – actually a prolacertiformProlacertiformesProlacertiformes were an order of archosauromorph reptiles that lived during the Permian and Triassic Periods...
archosauromorph - "ProcerosaurusProcerosaurusProcerosaurus is the name given to an invalid genus of dinosaur.There are two Procerosaurus specimens:*The first was described as P...
" Fritsch, 1905 – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as PonerosteusPonerosteusPonerosteus is a dubious genus of archosaur which was first identified as "Iguanodon exogirarum" by Antonin Fritsch in 1878 for a specimen from the Cenomanian . He later renamed it Procerosaurus, unaware that this name was already in use... - ProcheneosaurusProcheneosaurusProcheneosaurus is a disused genus of hadrosaur dinosaur, based on small skulls with low domes in front of the eyes. It is now believed that the remains referred to its various species were from juvenile individuals of multiple genera of crested hadrosaurs...
– junior synonym of LambeosaurusLambeosaurusLambeosaurus is a genus of hadrosaurid dinosaur that lived about 76 to 75 million years ago, in the Late Cretaceous Period of North America. This bipedal/quadrupedal, herbivorous dinosaur is known for its distinctive hollow cranial crest, which in the best-known species resembled a hatchet...
- ProcompsognathusProcompsognathusProcompsognathus is a genus of small theropod dinosaur that lived during the late Triassic period , about 210 million years ago. Procompsognathus was named by Eberhard Fraas in 1913. He named the type species, P...
- ProdeinodonProdeinodonProdeinodon is a dubious genus of theropod dinosaur from the Early Cretaceous of China and Mongolia. Three species have been identified, all three known only from tooth fragments showing no diagnostic features, making them difficult to classify, though they may belong to a carnosaur.The type...
- "Proiguanodon" – nomen nudum; IguanodonIguanodonIguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedal hypsilophodontids and the ornithopods' culmination in the duck-billed dinosaurs...
- PropanoplosaurusPropanoplosaurusPropanoplosaurus is a genus of herbivorous nodosaurid dinosaur from the Early Cretaceous Patuxent Formation of Maryland. Its type specimen is a natural cast and partial natural mold of a hatchling....
- ProplanicoxaProplanicoxaProplanicoxa is a genus of iguanodont which existed in what is now England during the Early Cretaceous period ....
- ProsaurolophusProsaurolophusProsaurolophus is a genus of hadrosaurid dinosaur from the Late Cretaceous of North America. It is known from the remains of at least 25 individuals belonging to two species, including skulls and skeletons, but it remains obscure...
- ProtarchaeopteryxProtarchaeopteryxProtarchaeopteryx is a genus of turkey-sized feathered theropod dinosaur from China. Known from the Jianshangou bed of the Yixian Formation, it lived during the early Aptian age of the Early Cretaceous, approximately 124.6 million years ago...
- ProtecovasaurusProtecovasaurusProtecovasaurus is a genus of archosaurian reptile from the Late Triassic of the southwestern United States. It was initially described as a basal ornithischian dinosaur, but was redescribed as a non-dinosaurian archosaur by Irmis et al. . The type species, Protecovasaurus lucasi, was formally...
– actually a non-dinosaurian archosauriform - Protiguanodon – junior synonym of PsittacosaurusPsittacosaurusPsittacosaurus is a genus of psittacosaurid ceratopsian dinosaur from the Early Cretaceous Period of what is now Asia, about 130 to 100 million years ago. It is notable for being the most species-rich dinosaur genus...
- ProtoavisProtoavisProtoavis is a problematic taxon of archosaurian known from fragmentary remains from Late Triassic Norian stage deposits near Post, Texas. Much controversy remains over the animal, and there are many different interpretations of what Protoavis actually is...
– described as a bird, probably a chimeraChimera (paleontology)In paleontology, a chimera is a fossil which was reconstructed with elements coming from more than a single species of animal. A now classic example of chimera is Protoavis.-List of paleontological chimeras:*Brontosaurus*Lametasaurus...
including theropodTheropodaTheropoda is both a suborder of bipedal saurischian dinosaurs, and a clade consisting of that suborder and its descendants . Dinosaurs belonging to the suborder theropoda were primarily carnivorous, although a number of theropod groups evolved herbivory, omnivory, and insectivory...
dinosaur bones - ProtoceratopsProtoceratopsProtoceratops is a genus of sheep-sized herbivorous ceratopsian dinosaur, from the Upper Cretaceous Period of what is now Mongolia. It was a member of the Protoceratopsidae, a group of early horned dinosaurs...
- ProtognathosaurusProtognathosaurusProtognathosaurus is a genus of dinosaur from the Middle Jurassic. It was a sauropod found in what is present-day China. The type species, P. oxyodon, was originally described by Zhang , and was renamed by George Olshevsky in 1991...
- "Protognathus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as ProtognathosaurusProtognathosaurusProtognathosaurus is a genus of dinosaur from the Middle Jurassic. It was a sauropod found in what is present-day China. The type species, P. oxyodon, was originally described by Zhang , and was renamed by George Olshevsky in 1991... - ProtohadrosProtohadrosProtohadros is a genus of herbivorous ornithischian dinosaur from the Late Cretaceous , 95 million years ago....
- ProtorosaurusProtorosaurusProtorosaurus , a lizard-like reptile of the order Prolacertiformes, is the earliest known archosauromorph. It lived during the Late Permian period in Germany. In 1914, a new ceratopsian dinosaur found by Lawrence Lambe was again given the name Protorosaurus...
von Meyer, 1830 – actually a non-dinosaurian reptileReptileReptiles are members of a class of air-breathing, ectothermic vertebrates which are characterized by laying shelled eggs , and having skin covered in scales and/or scutes. They are tetrapods, either having four limbs or being descended from four-limbed ancestors... - "ProtorosaurusChasmosaurusChasmosaurus is a genus of ceratopsid dinosaur from the Upper Cretaceous Period of North America. Its name means 'opening lizard', referring to the large openings in its frill . With a length of and a weight of , Chasmosaurus was a ceratopsian of average size...
" Lambe, 1914 – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as ChasmosaurusChasmosaurusChasmosaurus is a genus of ceratopsid dinosaur from the Upper Cretaceous Period of North America. Its name means 'opening lizard', referring to the large openings in its frill . With a length of and a weight of , Chasmosaurus was a ceratopsian of average size... - "Protrachodon" – nomen nudum; OrthomerusOrthomerusOrthomerus is a genus of duckbill dinosaur from the Late Cretaceous of The Netherlands, Belgium and possibly Ukraine. It is today an obscure genus, but in the past was conflated with the much better known Telmatosaurus....
- "Proyandusaurus" – nomen nudum; HexinlusaurusHexinlusaurusHexinlusaurus is a genus of basal ornithischian dinosaur from the Middle Jurassic of China. The holotype , consists of an almost complete, articulated skull and some postcranial material, collected from a terrestrial sandstone within the Lower Shaximiao Formation at the famous dinosaur-bearing...
. - PseudolagosuchusPseudolagosuchusPseudolagosuchus is a genus of dinosauromorph from the Middle Triassic Chañares Formation of Argentina. It may be a junior synonym of Lewisuchus, but there is very little overlapping material...
– actually a non-dinosaurian dinosauromorph - PsittacosaurusPsittacosaurusPsittacosaurus is a genus of psittacosaurid ceratopsian dinosaur from the Early Cretaceous Period of what is now Asia, about 130 to 100 million years ago. It is notable for being the most species-rich dinosaur genus...
- PteropelyxPteropelyxPteropelyx is a dubious genus of Late Cretaceous hadrosaurid dinosaur from the Judith River Formation of Montana, named by Edward Drinker Cope in 1889. Historically, several species were assigned to it, all based on extremely fragmentary remains, but there is no evidence to support these assignments...
- PterospondylusPterospondylusPterospondylus is a dubious genus of theropod dinosaur from the Late Triassic. It was a coelophysoid theropod which lived in what is now Germany . The type species, Pterospondylus trielbae, was described by Jaekel in 1913-14 for a single back vertebra...
- PuertasaurusPuertasaurusPuertasaurus is a genus of titanosaurid sauropod that appeared during the Late Cretaceous. It lived in what is now Patagonia. The type species, Puertasaurus reuili, is named in honor of Pablo Puerta and Santiago Reuil, the co-discoverers in January 2001 of the specimen...
- PukyongosaurusPukyongosaurusPukyongosaurus is a genus of titanosauriform dinosaur that lived in Korea during the Early Cretaceous period. It was closely related to Euhelopus, and is known from a series of vertebrae in the neck and back.-References:...
- PycnonemosaurusPycnonemosaurusPycnonemosaurus is a genus of carnivorous theropod dinosaur that belonged to the family Abelisauridae. It was found in the Upper Cretaceous Bauru-type red conglomerate sandstone, in the Mato Grosso, in Brazil and lived about 70 million years ago, during the Late Cretaceous .Thus far, fossil...
- PyroraptorPyroraptorPyroraptor is a genus of dromaeosaurid dinosaur from the late Cretaceous Period of France. It is known from a single specimen. It was found in 1992 in the south of France, in Provence, and is known only from a few bones. It was named Pyroraptor olympius by Allain and Taquet in 2000. The name means...
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- QantassaurusQantassaurusQantassaurus is a genus of two-legged, plant-eating ornithischian dinosaur that lived in Australia about 115 million years ago, when the continent was still partly south of the Antarctic Circle...
- QiaowanlongQiaowanlongQiaowanlong is a genus of sauropod dinosaur. Fossils belonging to the genus were found in 2007 from the Yujinzi Basin of Gansu, China, and were described in 2009 in the Proceedings of the Royal Society B. The remains come from a geological formation called the Xinminpu Group, dating to the Early...
- QinlingosaurusQinlingosaurusQinlingosaurus is a genus of sauropod dinosaur from Cretaceous Asia. The type species, Q. luonanensis, was named by Xue, Zhang and Bi in 1996 on the strength of an ilium, ischium and three vertebrae. From such little fossil evidence, it is classified as Sauropoda incertae sedis...
- QingxiusaurusQingxiusaurusQingxiusaurus is a genus of titanosaur sauropod dinosaur from the Late Cretaceous of Guanxi, China. The type species, described by Mo et al. in 2008, is Q. youjiangensis. Like other sauropods, Qingxiusaurus would have been a large quadrupedal herbivore....
- QiupalongQiupalongQiupalong is a genus of ornithomimid dinosaur. Qiupalong lived during the late Cretaceous period in what is now Henan Province, China. It is known from a single partial skeleton recovered from the Qiupa Formation...
- QuaesitosaurusQuaesitosaurusQuaesitosaurus is a genus of titanosaurian sauropod found by Kurzanov and Bannikov in 1983. The type species is Quaesitosaurus orientalis. It lived from 85 to 70 million years ago during the Late Cretaceous...
- QuilmesaurusQuilmesaurusQuilmesaurus is a genus of theropod dinosaur from the Patagonian Upper Cretaceous , a time when South American theropod assemblages were dominated by abelisaurids and carcharodontosaurs. However, the morphology of Quilmesaurus suggests it may have been a tetanuran...
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- RachitremaRachitremaRachitrema is a poorly-known genus of prehistoric reptile from the Triassic of France. Its remains were found in France by two independent collectors, towards the end of the nineteenth century. They were only isolated bone fragments....
– possibly an ichthyosaurIchthyosaurIchthyosaurs were giant marine reptiles that resembled fish and dolphins... - RahiolisaurusRahiolisaurusRahiolisaurus is a genus of abelisaurid theropod dinosaur which existed in India during the Late Cretaceous period. It was described in 2010, based on fossils recovered from the Lameta Formation in the Indian state of Gujarat...
- "RahonaRahonaRahona is a genus of moths in the family Lymantriidae. It was named by Griveaud in 1975. In 1998, the name was inadvertently used again for a fossil species of Mesozoic bird, Rahona ostromi, by Catherine Forster and colleagues. When they discovered that the name had already been used by Griveaud,...
" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as RahonavisRahonavisRahonavis is a genus of bird-like dinosaur from the Late Cretaceous of what is now northwestern Madagascar. It is known from a partial skeleton found in Maevarano Formation rocks at a quarry near Berivotra, Mahajanga Province... - RahonavisRahonavisRahonavis is a genus of bird-like dinosaur from the Late Cretaceous of what is now northwestern Madagascar. It is known from a partial skeleton found in Maevarano Formation rocks at a quarry near Berivotra, Mahajanga Province...
– possibly a birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from... - RajasaurusRajasaurusRajasaurus is a genus of carnivorous abelisaurian theropod dinosaur with an unusual head crest. Between 1982 and 1984, its fossilized bones were discovered by Suresh Srivastava of the Geological Survey of India...
- RapatorRapatorRapator is a genus of theropod dinosaur from the early Cretaceous period Griman Creek Formation of New South Wales, Australia....
- RapetosaurusRapetosaurusRapetosaurus is a genus of sauropod dinosaur that lived in Madagascar from 70 to 65 million years ago, at the end of the Cretaceous Period. Only one species Rapetosaurus is a genus of sauropod dinosaur that lived in Madagascar from 70 to 65 million years ago, at the end of the Cretaceous Period....
- RaptorexRaptorexRaptorex is a dubious genus of tyrannosaurid dinosaur. Its fossil remains consist of a single juvenile specimen probably uncovered in Mongolia, or possibly northeastern China. The type species is R. kriegsteini, described in 2009 by Sereno and colleagues. The genus name is derived from Latin ,...
- RatchasimasaurusRatchasimasaurusRatchasimasaurus is a genus of non-hadrosaurid iguanodontian ornithopod dinosaur from Early Cretaceous Khok Kruat Formation of Nakhon Ratchasima Province in northeastern Thailand. One autapomorphy of Ratchasimasaurus is its elongated and flat ramus of the dentary...
- RayososaurusRayososaurusRayososaurus is a genus of plant-eating sauropod dinosaur of the superfamily Diplodocoidea. It was found in the Rayoso Formation, in Patagonia, Argentina and lived about 99 million years ago . The type species is R...
- RazanandrongobeRazanandrongobeRazanandrongobe is a genus of carnivorous archosaurian reptile of uncertain affinities from the Middle Jurassic of Madagascar. It is based on MSNM V5770, a fragment of maxilla, the main tooth-bearing bone of the upper jaw, and several isolated teeth have also been assigned to it...
– may be a theropod or crocodylomorph - RebbachisaurusRebbachisaurusRebbachisaurus is a genus of sauropod dinosaur of the superfamily Diplodocoidea, up to 20 meters long, that lived during the Early-Late Cretaceous period in Africa about 99 million years ago. This massive four-legged plant-eating animal had a small head, a long, graceful neck and a whiplike...
- RegnosaurusRegnosaurusRegnosaurus is a genus of herbivorous stegosaurian dinosaur that lived during the Early Cretaceous Period in what is now England.-Discovery and species:...
- "Revueltoraptor" – nomen nudum; junior synonym of GojirasaurusGojirasaurusGojirasaurus is a dubious genus of dinosaur named after the giant monster movie character Gojira . It was discovered in the Bull Canyon Formation...
- RevueltosaurusRevueltosaurusRevueltosaurus is a genus of prehistoric crurotarsan from Late Triassic New Mexico and Arizona.According to William Parker, who discovered the partial skeleton, "we have pretty much erased the record of Triassic ornithischian dinosaurs from North America, Europe and worldwide, except for South...
– actually a pseudosuchiaPseudosuchiaPseudosuchia is the name originally given to a group of prehistoric reptiles from the Triassic period. The name has been variously interpreted, and it is still sometimes, if infrequently, used in scientific literature today. A more commonly used name, Crurotarsi, is often substituted for...
n - RhabdodonRhabdodonRhabdodon is a genus of dinosaur that lived in Europe approximately 70 million years ago in the Late Cretaceous. It is unclear whether it was an iguanodont or a hypsilophodont, and may be a "missing link" between the two. Current evidence indicates it is an iguanodont similar to Tenontosaurus...
- RhadinosaurusRhadinosaurusRhadinosaurus is a genus of prehistoric reptile described in 1881 by Harry Govier Seeley, from remains found in Austria. The name means "slender lizard". It lived about 80 million years ago . The type species is R. alcinus.The fossil finds have been fragmentary...
– may be non-dinosaurian, possibly crocodiliaCrocodiliaCrocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
n - Rhodanosaurus – junior synonym of StruthiosaurusStruthiosaurusStruthiosaurus is one of the smallest known and most basal genera of nodosaurid dinosaurs, from the Late Cretaceous period of Austria, Romania and France in Europe. It was protected by body armour...
- RhoetosaurusRhoetosaurusRhoetosaurus , named after Rhoetus, a titan in Greek Mythology, is a genus of sauropod dinosaur from the Jurassic of what is now eastern Australia. Rhoetosaurus is estimated to have been about 12–15 metres long...
- RhopalodonRhopalodonRhopalodon is a genus of synapsid from the Permian of Russia. It has been variously classified as a dinosaur, a dinocephalian, or another branch of Reptilia. Rhopalodon is notable for being among the first reptiles mentioned in Nature. T.H. Huxley wrote of this reptile, among others, in the...
– actually a synapsidSynapsidSynapsids are a group of animals that includes mammals and everything more closely related to mammals than to other living amniotes. They are easily separated from other amniotes by having an opening low in the skull roof behind each eye, leaving a bony arch beneath each, accounting for their name... - RicardoestesiaRicardoestesiaRichardoestesia is a medium-sized genus of theropod dinosaur from the late Cretaceous Period of what is now North America. It is known from a single pair of lower jaw bones and a large number of isolated teeth....
– intended but unofficial spelling of Richardoestesia - Richardoestesia
- "Rileya" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as RileyasuchusRileyasuchusRileyasuchus is a genus of phytosaur from the Rhaetian of England. It has a confusing history, being associated with the taxonomy of Palaeosaurus and Thecodontosaurus, and being a replacement name for a preoccupied genus Rileyasuchus (meaning "Riley’s crocodile") is a genus of phytosaur from... - RileyasuchusRileyasuchusRileyasuchus is a genus of phytosaur from the Rhaetian of England. It has a confusing history, being associated with the taxonomy of Palaeosaurus and Thecodontosaurus, and being a replacement name for a preoccupied genus Rileyasuchus (meaning "Riley’s crocodile") is a genus of phytosaur from...
– a chimeraChimera (paleontology)In paleontology, a chimera is a fossil which was reconstructed with elements coming from more than a single species of animal. A now classic example of chimera is Protoavis.-List of paleontological chimeras:*Brontosaurus*Lametasaurus...
of phytosaurPhytosaurPhytosaurs are an extinct group of large semi-aquatic Late Triassic archosaurs. Phytosaurs belong to the family Phytosauridae and the order Phytosauria. They were long-snouted and heavily armoured, bearing a remarkable resemblance to modern crocodiles in size, appearance, and lifestyle, an example...
and ThecodontosaurusThecodontosaurusThecodontosaurus is a genus of herbivorous basal sauropodomorph dinosaur which lived during the late Triassic period ....
remains - RincheniaRincheniaRinchenia is a genus of Mongolian oviraptorid dinosaur from the late Cretaceous Period. The type species, Rinchenia mongoliensis, was originally classified as a species within the genus Oviraptor , but a re-examination by Barsbold in 1997 found differences significant enough to warrant a separate...
- RinconsaurusRinconsaurusRinconsaurus is a genus of dinosaur from the Late Cretaceous. It was a titanosaurid sauropod which lived in what is now Argentina. The type species, Rinconsaurus caudamirus, was described by Calvo and Riga in 2003, and is based on three partial skeletons.-Description:Like all sauropods,...
- Rioarribasaurus – junior synonym of CoelophysisCoelophysisCoelophysis , meaning "hollow form" in reference to its hollow bones , is one of the earliest known genera of dinosaur...
- RiojasaurusRiojasaurusRiojasaurus was a herbivorous prosauropod dinosaur named after La Rioja Province in Argentina where it was found by José Bonaparte. It lived during the Late Triassic and grew to about long. Riojasaurus is the only known riojasaurid to live in South America.-Description:Riojasaurus had a heavy...
- RiojasuchusRiojasuchusRiojasuchus is an extinct genus of quadrupedal crurotarsan archosaur. Riojasuchus is a member of Ornithosuchidae, a family of facultatively bipedal carnivores that were geographically widespread during the Late Triassic. Two other genera, Ornithosuchus and Venaticosuchus, are currently known....
– actually a non-dinosaurian archosaurArchosaurArchosaurs are a group of diapsid amniotes whose living representatives consist of modern birds and crocodilians. This group also includes all extinct non-avian dinosaurs, many extinct crocodilian relatives, and pterosaurs. Archosauria, the archosaur clade, is a crown group that includes the most... - RocasaurusRocasaurusRocasaurus is a genus of titanosaurian sauropod that lived in South America about 80 million years ago, during the Late Cretaceous. This genus grew up to 8 meters long, making it one of the smaller sauropods...
- "Roccosaurus" – nomen nudum; MelanorosaurusMelanorosaurusMelanorosaurus , is a genus of basal sauropodomorph dinosaur that lived during the Late Triassic period. A herbivore from South Africa, it had a large body and sturdy limbs, suggesting it moved about on all fours...
- RubeosaurusRubeosaurusRubeosaurus is a genus of ceratopsian dinosaur which lived in what is now North America. Rubeosaurus fossils have been recovered from strata of the upper Two Medicine Formation of the Upper Cretaceous of Montana, dating to between 75 and 74 million years ago...
- RuehleiaRuehleiaRuehleia is a genus of prosauropod dinosaur from the Late Triassic period of Germany. The type species is R. bedheimensis, described by Galton in 2001, and is named for the German paleontologist Hugo Ruehle von Lilienstern...
- RugopsRugopsRugops is a genus of theropod dinosaur which inhabited what is now Africa approximately 95 million years ago...
- "RutellumRutellumRutellum is the pre-Linnaean name given to a dinosaur specimen from the Middle Jurassic. It was a sauropod, possibly a cetiosaurid, which lived in what is now England. The specimen, called Rutellum implicatum, was described in 1699 by Edward Lhuyd, and is notable as the earliest named entity that...
" – pre-Linnaean name, invalid under modern taxonomic systems - RuyangosaurusRuyangosaurusRuyangosaurus is a genus of sauropod dinosaur recovered from the Late Cretaceous Mangchuan Formation of China. The type species is R. giganteus, described in 2009 by a group of scientists from the Chinese Academy of Sciences and the Henan Geological Museum.Along with Huanghetitan and Daxiatitan,...
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- SacisaurusSacisaurusSacisaurus is a dinosauriform from the Late Triassic Caturrita Formation of southern Brazil...
– probably a dinosauromorph - SahaliyaniaSahaliyaniaSahaliyania is a genus of lambeosaurine hadrosaurid dinosaur from the Late Cretaceous of Heilongjiang, China...
- SaichaniaSaichaniaSaichania is a genus of ankylosaurid dinosaur from the Late Cretaceous period. It was found in the Barun Goyot Formation at Khulsan in the Nemegt Basin, southern Mongolia. It lived during the Campanian. The type species is Saichania chulsanensis.Saichania was described by Teresa Maryańska in 1977,...
- "Salimosaurus" – nomen nudum, probably BrachiosaurusBrachiosaurusBrachiosaurus is a genus of sauropod dinosaur from the Jurassic Morrison Formation of North America. It was first described by Elmer S. Riggs in 1903 from fossils found in the Grand River Canyon of western Colorado, in the United States. Riggs named the dinosaur Brachiosaurus altithorax,...
or Giraffatitan
- SaltasaurusSaltasaurusSaltasaurus is a genus of titanosaurid sauropod dinosaur of the Late Cretaceous Period. Relatively small among sauropods, though still massive by the standards of modern creatures, Saltasaurus was characterized by a diplodocid-like head...
- SaltopusSaltopusSaltopus is a genus of very small bipedal dinosauriform, roughly 60 centimeters long, not much bigger than a rabbit, that was discovered in Scotland by Friedrich von Huene in 1910. It was a late Triassic carnivore. Probably the size of a small cat, with hollow bones like those of a bird,...
– probably a dinosauromorph - "SaltriosaurusSaltriosaurusSaltriosaurus is the informal name for a theropod dinosaur that lived during the Jurassic period. It was found in 1996, when Angelo Zanella discovered its remains in a quarry in Saltrio, in northern Italy. Very little is known about the dinosaur...
" – nomen nudum - "SanchusaurusSanchusaurus"Sanchusaurus" is an informal name for a ornithomimid dinosaur from the Early Cretaceous period of Asia. It is only known by a partial tail vertebra, found in Nakasato, Japan. It may be synonymous with Gallimimus; Dong Zhiming and coauthors assigned to Gallimimus sp. in 1990...
" – nomen nudum - "SangonghesaurusSangonghesaurus"Sangonghesaurus" is the informal name given to a genus of dinosaur. It was an ankylosaur, a quadrupedal, armoured herbivore. "Sangonghesaurus" was found in Xinjiang, China, in either Jurassic or Late Cretaceous rocks. The name was coined by Zhao in 1983...
" – nomen nudum - SanjuansaurusSanjuansaurusSanjuansaurus is a genus of herrerasaurid dinosaur from the Late Triassic-age Ischigualasto Formation of northwestern Argentina...
- SanpasaurusSanpasaurusSanpasaurus is the name given to the mixed-up fossils of sauropod and iguanodontian dinosaurs from the Jurassic of Sichuan, China. The type species, S. yaoi, was described by Chung Chien Young, in 1944, who recognized that the remains arrived to the lab in a jumbled state, so that their...
- SantanaraptorSantanaraptorSantanaraptor is a genus of theropod dinosaur that lived in South America during the Albian or Aptian stage of the Early Cretaceous, about 108 million years ago. Known from a partial juvenile specimen recovered with mineralized soft tissue, which was unearthed in 1996 from the Santana Formation of...
- SarahsaurusSarahsaurusSarahsaurus is a genus of basal sauropodomorph dinosaur which lived during the lower Jurassic period in what is now northeastern Arizona, USA....
- SarcolestesSarcolestesSarcolestes is a genus of early ankylosaurian dinosaur from Middle Jurassic England, Callovian, around 163 million years ago. The type species, Sarcolestes leedsi, was described by Richard Lydekker in 1893, but is based on very fragmentary material, holotype BMNH R2682, consisting of a single left...
- SarcosaurusSarcosaurusSarcosaurus is a genus of theropod dinosaur, either a coelophysoid or a basal ceratosaur, roughly 3.5 meters long. It lived during the Sinemurian stage of the Early Jurassic, about 194 million years ago....
- SaturnaliaSaturnalia (dinosaur)Saturnalia is an extinct genus of basal sauropodomorph dinosaur known from the Triassic of Rio Grande do Sul, southern Brazil.-Discovery:Saturnalia was originally named on the basis of three partial skeletons...
- Sauraechinodon – junior synonym of EchinodonEchinodonEchinodon meaning "hedgehog tooth" in reference to the spines on its teeth , occasionally known as Saurechinodon, is a genus of small European dinosaur of the early Cretaceous Period , 140 million years ago.-Discovery and species:The type specimen was discovered by Samuel Beckles in the Purbeck...
- "Sauraechmodon" – nomen nudum; EchinodonEchinodonEchinodon meaning "hedgehog tooth" in reference to the spines on its teeth , occasionally known as Saurechinodon, is a genus of small European dinosaur of the early Cretaceous Period , 140 million years ago.-Discovery and species:The type specimen was discovered by Samuel Beckles in the Purbeck...
- SaurolophusSaurolophusSaurolophus is a genus of large hadrosaurine duckbill that lived about 69.5-68.5 million years ago, in the Late Cretaceous of North America and Asia; it is one of the few genera of dinosaurs known from multiple continents. It is distinguished by a spike-like crest which projects up and back...
- SauropeltaSauropeltaSauropelta is a genus of nodosaurid dinosaur that existed in the Early Cretaceous Period of North America. One species has been named although others may have existed. Anatomically, Sauropelta is one of the most well-understood nodosaurids, with fossilized remains recovered in the U.S. states of...
- SaurophaganaxSaurophaganaxSaurophaganax is a genus of allosaurid dinosaur from the Morrison Formation of Late Jurassic Oklahoma . Some paleontologists consider it to be a species of Allosaurus...
- "Saurophagus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as SaurophaganaxSaurophaganaxSaurophaganax is a genus of allosaurid dinosaur from the Morrison Formation of Late Jurassic Oklahoma . Some paleontologists consider it to be a species of Allosaurus... - SauroplitesSauroplitesSauroplites is a genus of ankylosaurid dinosaur from the Early Cretaceous. The type species, Sauroplites scutiger, was formally described by Bohlin in 1953, but is often considered a nomen dubium because it is based on fragmentary material. Sauroplites lived in what is now Gansu, China, during the...
- "SauropodusSauropodus"Sauropodus" is the informal name given to an as yet undescribed genus of dinosaur from the Late Cretaceous. It was a sauropod which lived in what is now Argentina. The type species was informally announced in 2001, but has not yet been formalized. Argentine paleontologist Edith Simon told...
" – nomen nudum - SauroposeidonSauroposeidonSauroposeidon is a genus of sauropod dinosaur known from four neck vertebrae that were found in the southeastern portion of the US state of Oklahoma. The fossils were found in rocks dating to the Early Cretaceous, a period when the sauropods of North America had diminished in both size and...
- SaurornithoidesSaurornithoidesSaurornithoides is a genus of troodontid maniraptoran dinosaur, living during the Late Cretaceous period. These creatures were predators, which could run fast on their hind legs and had excellent sight and hearing...
- SaurornitholestesSaurornitholestesSaurornitholestes is a genus of carnivorous dromaeosaurid theropod dinosaur from the late Cretaceous of Alberta, Montana and New Mexico....
- ScansoriopteryxScansoriopteryxScansoriopteryx is a genus of avialan dinosaur. Described from only a single juvenile fossil specimen found in Liaoning, China, Scansoriopteryx is a sparrow-sized animal that shows adaptations in the foot indicating an arboreal lifestyle. It possessed an unusual, elongated third finger...
– possible junior synonym of Epidendrosaurus - Scaphonyx – actually a rhynchosaurRhynchosaurRhynchosaurs were a group of Triassic diapsid reptiles related to the archosaurs.-Description:Rhynchosaurs were herbivores, and at times abundant , with stocky bodies and a powerful beak...
- ScelidosaurusScelidosaurusScelidosaurus is a genus of quadrupedal, lightly plated, herbivorous dinosaur about long. It lived during the Early Jurassic Period, during the Hettangian to Sinemurian stages around 199.6 to 194 million years ago. Its fossils have been found in both England and in Arizona, in the United...
- ScipionyxScipionyxScipionyx is a genus of theropod dinosaur from the Early Cretaceous of Italy, around 113 million years ago. There has been only one skeleton discovered, which is notable for the preservation of soft tissue and internal organs. It is the fossil of a juvenile only half a metre long...
- ScleromochlusScleromochlusScleromochlus is an extinct genus of small avemetatarsalian from the Late Triassic period. A lightly built cursorial animal, its phylogenetic position has been debated; as different analyses have found it to be either the basal-most ornithodiran, the sister-taxon to Pterosauria, or a basal member...
– actually a non-dinosaurian avemetatarsaliaAvemetatarsaliaAvemetatarsalia is a clade name established by British palaeontologist Michael Benton in 1999 for all crown group archosaurs that are closer to birds than to crocodiles. It includes a similarly defined subgroup, Ornithodira...
n - Scolosaurus – junior synonym of EuoplocephalusEuoplocephalusEuoplocephalus was one of the largest genera of ankylosaurian dinosaurs, at about the size of a small elephant. It is also the ankylosaurian with the best fossil record, so its extensive spiked armor, low-slung body and great club-like tail are well documented.-Description:Among the...
- "Scrotum" – invalid, considered to have been a descriptive label rather than a Linnaean name
- ScutellosaurusScutellosaurusScutellosaurus is a genus of herbivorous dinosaur that lived in North America around 200 to 196 million years ago, in the Early Jurassic times....
- SecernosaurusSecernosaurusSecernosaurus is a genus of herbivorous dinosaur. Secernosaurus was a hadrosaur, a "duck-billed" dinosaur which lived during the Late Cretaceous. Its fossils have been found in Argentina....
- SegisaurusSegisaurusSegisaurus is a genus of small coelophysoid theropod dinosaur, that measured approximately 1 metre in length. The only known specimen was discovered in 1933 in early Jurassic strata in Tsegi Canyon, Arizona, for which it was named. Segisaurus is the only dinosaur to have ever been excavated from...
- SegnosaurusSegnosaurusSegnosaurus is a genus of herbivorous theropod dinosaur belonging to the Therizinosauridae from the Cretaceous of Mongolia.-Discovery and naming:...
- Seismosaurus – junior synonym of DiplodocusDiplodocusDiplodocus , or )is a genus of diplodocid sauropod dinosaur whose fossils were first discovered in 1877 by S. W. Williston. The generic name, coined by Othniel Charles Marsh in 1878, is a Neo-Latin term derived from Greek "double" and "beam", in reference to its double-beamed chevron bones...
- SeitaadSeitaadSeitaad is a genus of sauropodomorph dinosaur which lived during the lower Jurassic period in what is now southern Utah, USA.Seitaad is known from an articulated partial postcranial holotype skeleton referred to as UMNH VP 18040. The skeleton is missing its head, neck and tail...
- "Selimanosaurus" – nomen nudum; DicraeosaurusDicraeosaurusDicraeosaurus is a genus of small diplodocoid sauropod dinosaur. It was named for the spines on the back of the neck. The first fossil was described by paleontologist Werner Janensch in 1914.Unlike most diplodocoids, Dicraeosaurus had a large head with a relatively short and wide neck...
- SellacoxaSellacoxaSellacoxa is a genus of iguanodont which existed in what is now England during the Early Cretaceous period ....
- Sellosaurus
- SerendipaceratopsSerendipaceratopsSerendipaceratops is a dubious genus of ornithischian dinosaur from the early Cretaceous Period of Australia.The type species, S. arthurcclarkei, was named after Arthur C...
- ShamosaurusShamosaurusShamosaurus is an extinct genus of basal ankylosaurid ankylosaur from Early Cretaceous deposits of Höövör, Mongolia. Shamosaurus is known from the holotype PIN N 3779/2 complete skull and jaw and the paratypes include partial skeleton remains and an armor. It was collected from the...
- ShanagShanagShanag is a genus of dromaeosaurid theropod dinosaur from the Early Cretaceous Period of Mongolia.The type species of Shanag is Shanag ashile. It was named and described by Alan Turner, Sunny Hai-Ching Hwang and Mark Norell in 2007. The generic name refers to the black-hatted dancers in the...
- Shanshanosaurus – junior synonym of TarbosaurusTarbosaurusTarbosaurus is a genus of tyrannosaurid theropod dinosaur that flourished in Asia about 70 million years ago, at the end of the Late Cretaceous Period. Fossils have been recovered in Mongolia, with more fragmentary remains found further afield in parts of China. Although many species have been...
- ShantungosaurusShantungosaurusShantungosaurus, meaning "Shandong Lizard", is a genus of saurolophine hadrosaurid dinosaurs found in the Late Cretaceous Wangshi Formation of the Shandong Peninsula in China.-Description:...
- ShanxiaShanxiaShanxia is a genus of ankylosaurid dinosaur that lived during the upper Cretaceous Period. Its fossils were recovered and named after the Shanxi Province of China, and it is known only from scrappy remains found in river deposits...
- ShanyangosaurusShanyangosaurusShanyangosaurus is a genus of theropod dinosaur found in Shaanxi, China, and known only from a few fragmentary leg bones. The bones are reportedly hollow; this, along with other features of the femur and known foot bones, suggest it is a member of the coelurosauria, but a specific family cannot be...
- ShaochilongShaochilongShaochilong is a genus of carcharodontosaurid dinosaur from the mid Cretaceous Ulansuhai Formation of China . The type species, S...
- ShenzhouraptorShenzhouraptorJeholornis is a genus of Mesozoic birds that lived approximately 120 million years ago during the Early Cretaceous of China...
– actually a birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
; likely junior synonym of Jeholornis. - ShenzhousaurusShenzhousaurusShenzhousaurus is a genus of basal ornithomimosaur from the Lower Cretaceous of China.The holotype was collected from near the bottom of the Yixian Formation at the Sihetun fossil site, Beipiao, western Liaoning Province...
- ShidaisaurusShidaisaurusShidaisaurus is a genus of basal tetanuran theropod dinosaur. Its fossil was found in early Middle Jurassic-age rocks of the Upper Lufeng Formation in Yunnan, China. It is known from a partial skeleton, holotype DML-LCA 9701-IV, found at the bottom of an assemblage of nine dinosaur individuals,...
- ShixinggiaShixinggiaShixinggia is a genus of oviraptorosaurian dinosaur from the Late Cretaceous period of Shixing County, Guangdong, China. While no skull was recovered, the specimen is known from a fair amount of post-cranial material that shows it was a fairly derived oviraptorosaur , of superfamily Caenagnathoidea...
- ShuangmiaosaurusShuangmiaosaurusShuangmiaosaurus is a genus of herbivorous ornithischian dinosaur which lived during the late Albian age of the Early Cretaceous Period, about 100 million years ago. It was an iguanodont euornithopod which lived in China....
- ShunosaurusShunosaurusShunosaurus, meaning "Shu Lizard", is a genus of sauropod dinosaur from Middle Jurassic beds in Sichuan Province in China, 170 million years ago...
- Shuosaurus – misspelling of ShunosaurusShunosaurusShunosaurus, meaning "Shu Lizard", is a genus of sauropod dinosaur from Middle Jurassic beds in Sichuan Province in China, 170 million years ago...
- ShuvosaurusShuvosaurusShuvosaurus is a genus of beaked reptile from the Late Triassic of Texas. It was described by Sankar Chatterjee in 1993 after it was discovered by his son Shuvo. It was initially interpreted as a Triassic member of the Cretaceous dinosaur family Ornithomimidae...
– actually a rauisuchiaRauisuchiaRauisuchia is a group of predatory and mostly large Triassic archosaurs. As a clade, Rauisuchia includes these Triassic forms and all crocodylomorphs, which are descendants of Triassic rauisuchians. The group in its traditional sense is paraphyletic, because it does not include crocodylomorph...
n - ShuvuuiaShuvuuiaShuvuuia is a genus of bird-like theropod dinosaur from the late Cretaceous period of Mongolia. It is a member of the family Alvarezsauridae, small coelurosaurian dinosaurs which are characterized by short but powerful forelimbs specialized for digging. The type species is Shuvuuia deserti, or...
- SiamodonSiamodonSiamodon is a genus of iguanodontian ornithopod dinosaur from Early Cretaceous deposits of northeastern Thailand. Siamodon is known from the holotype PRC-4, a well-preserved left maxilla and from the referred materials PRC-5, an isolated maxillary tooth and PRC-6, a braincase...
- SiamosaurusSiamosaurusSiamosaurus is a genus of theropod dinosaur from Early Cretaceous Thailand. The size of the animal is unknown, but it may have reached a length of about 9.1 meters . The type species, Siamosaurus suteethorni, was formally described by Buffetaut and Ingavat in 1986...
- SiamotyrannusSiamotyrannusSiamotyrannus is a genus of theropod dinosaur from the early Cretaceous . It is known from a partial skeleton which includes part of the pelvis, the sacrum, and a number of vertebrae. The fossils were found in 1993 by Somchai Traimwichanon in the Sao Khua Formation of northeastern Thailand...
- SigilmassasaurusSigilmassasaurusSigilmassasaurus is a genus of tetanuran theropod dinosaur from the middle of the Cretaceous Period of northern Africa...
- SilesaurusSilesaurusSilesaurus is a genus of dinosauriform from the Late Triassic, approximately 230 million years ago in the Carnian faunal stage of what is now Poland....
– probably a dinosauromorph - SiluosaurusSiluosaurusSiluosaurus is a genus of ornithopod dinosaur from the Barremian-Albian-age Lower Cretaceous Xinminbao Group of Gansu, China. It is based on IVPP V.11117 , two teeth...
- SilvisaurusSilvisaurusSilvisaurus, from the Latin silva "woodland" and Greek saurus "lizard", is a nodosaurid ankylosaur from the middle Cretaceous of Kansas.-Discovery and species:...
- SimilicaudipteryxSimilicaudipteryxSimilicaudipteryx, meaning "similar to Caudipteryx" , is a genus of theropod dinosaur of the family Caudipteridae. Its fossil remains were recovered from the Jiufotang and Yixian Formations of northeastern China, dating to the early Cretaceous Period between 124 and 120 million years ago...
- SinocalliopteryxSinocalliopteryxSinocalliopteryx is a genus of compsognathid dinosaur from the Lower Cretaceous Yixian Formation of China...
- SinoceratopsSinoceratopsSinoceratops is a genus of ceratopsian dinosaur described by Xu Xing and colleagues in 2010. It lived during the Late Cretaceous in what is now China. The type species is S. zhuchengensis....
- SinocoelurusSinocoelurusSinocoelurus is a genus of theropod dinosaur from the ?Tithonian-age Upper Jurassic Kyangyan Series of Sichuan, China. It is an obscure tooth taxon.-History:Famous Chinese paleontologist Yang Zhongjian Sinocoelurus (meaning "Chinese hollow tail", in reference to location and to relate the new...
- "SinopliosaurusSinopliosaurus (dinosaur)"Sinopliosaurus" is a spinosaurid theropod dinosaur from the Early Cretaceous of southern China, known only from teeth. It includes a single species, "S." fusuiensis, that was first assigned to the plesiosaur Sinopliosaurus. Because this species is not a plesiosaur and therefore is not within the...
" – material originally classified with pliosaurPliosaurPliosauroidea is an extinct clade of marine reptiles. Pliosauroids, also commonly known as pliosaurs, are known from the Jurassic and Cretaceous Periods. The pliosauroids were short-necked plesiosaurs with large heads and massive toothed jaws. These swimming reptiles were not dinosaurs but distant...
SinopliosaurusSinopliosaurusSinopliosaurus is a genus of pliosauroid plesiosaur, a type of short-necked marine reptile, from the Early Cretaceous of People's Republic of China. One species, "S." fusuiensis, was later shown to be based on teeth from a spinosaurid theropod dinosaur....
, now recognized as dinosaurian - SinornithoidesSinornithoidesSinornithoides is a genus of troodontid theropod dinosaur. It lived during the Early Cretaceous . It measured approximately 1 meter long...
- SinornithomimusSinornithomimusSinornithomimus is a genus of ornithomimid theropod dinosaur found in 1997, in the early Late Cretaceous strata of the Ulansuhai Formation located at Alshanzuo Banner, Nei Mongol Autonomous Region, Northern China.-Discovery and naming:...
- SinornithosaurusSinornithosaurusSinornithosaurus is a genus of feathered dromaeosaurid dinosaur from the early Cretaceous Period of the Yixian Formation in what is now China. It was the fifth non–avian feathered dinosaur genus discovered by 1999...
- SinosauropteryxSinosauropteryxSinosauropteryx was the first genus of dinosaur outside of Avialae to be found with evidence of feathers. They were covered with "furry" coats of very simple filament-like feathers...
- SinosaurusSinosaurusSinosaurus was a tetanuran theropod dinosaur which lived during the Late Triassic or Early Jurassic Period. Its fossils were found in the Lufeng Formation, in Yunnan Province, China. It was a bipedal carnivore...
- SinotyrannusSinotyrannusSinotyrannus is a genus of large basal proceratosaurid dinosaur, a relative of tyrannosaurids which flourished in North America and Asia during the Jurassic and early Cretaceous periods. Sinotyrannus is known from a single incomplete fossil specimen including a partial skull, from the Early...
- SinovenatorSinovenatorSinovenator is a genus of troodontid dinosaur from China. It is from the early Cretaceous Period. Two fossils were originally found in the Lujiatun Beds of the lower Yixian Formation in China, about 125 million years ago during the Aptian age.The type species, Sinovenator changii, was...
- SinraptorSinraptorSinraptor is a genus of theropod dinosaur from the Late Jurassic. The name Sinraptor comes from the Latin prefix "Sino", meaning Chinese, and "Raptor" meaning thief. The specific name dongi honours Dong Zhiming...
- Sinucerasaurus – junior synonym of SinusonasusSinusonasusSinusonasus is a genus of dinosaur from the Early Cretaceous Period, recovered from the Yixian Formation. This dinosaur lived in what is now the Liaoning Province of China. Sinusonasus was a theropod, specifically a troodontid dinosaur...
- SinusonasusSinusonasusSinusonasus is a genus of dinosaur from the Early Cretaceous Period, recovered from the Yixian Formation. This dinosaur lived in what is now the Liaoning Province of China. Sinusonasus was a theropod, specifically a troodontid dinosaur...
- SkorpiovenatorSkorpiovenatorSkorpiovenator is a genus of abelisaurid theropod dinosaur from the late Cretaceous period of Argentina.The type species, Skorpiovenator bustingorryi, is known from a single, nearly complete skeleton missing only most of the forelimbs and parts of the tail...
- "Smilodon" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as ZanclodonZanclodonZanclodon is an extinct genus of archosaurian reptile endemic to what would have been Europe during the Middle Triassic-Late Triassic epochs .... - SonidosaurusSonidosaurusSonidosaurus is a genus of sauropod dinosaur from the Late Cretaceous. It was a titanosaur which lived in what is now China. The type species, Sonidosaurus saihangaobiensis, was described by Xu, Zhang, Tan, Zhao, and Tan in 2006. It was a small titanosaur, about 9 meters long...
- SonorasaurusSonorasaurusSonorasaurus is a genus of brachiosaurid dinosaur from the middle Cretaceous . It was a herbivorous sauropod whose fossils have been found in southern Arizona in the United States. Its name, which means "Sonora lizard", comes from the Sonoran Desert where its fossils were first found...
- SphaerotholusSphaerotholusSphaerotholus is a genus of pachycephalosaurid dinosaur from the Upper Cretaceous of the western United States. To date, two species have been described: the type species, S. goodwini, from the Den-na-zin Member of the Kirtland Formation of San Juan County, New Mexico, and a second species, S...
- SphenosaurusSphenosaurusSphenosaurus is a poorly known genus of procolophonid, a type of prehistoric reptile from the Permian. Originally assigned the name Palaeosaurus sternbergii, by...
– actually a non-dinosaurian reptileReptileReptiles are members of a class of air-breathing, ectothermic vertebrates which are characterized by laying shelled eggs , and having skin covered in scales and/or scutes. They are tetrapods, either having four limbs or being descended from four-limbed ancestors... - Sphenospondylus – junior synonym of IguanodonIguanodonIguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedal hypsilophodontids and the ornithopods' culmination in the duck-billed dinosaurs...
- SpinophorosaurusSpinophorosaurusSpinophorosaurus is a genus of early sauropod dinosaur from Niger. It was recovered in a rock formation belonging to the lower part of the Irhazer Group, the age of which is unknown but may be Middle Jurassic or older. It is unusual for having spiked osteoderms, probably from the tail, similar to...
- SpinosaurusSpinosaurusSpinosaurus is a genus of theropod dinosaur which lived in what is now North Africa, from the lower Albian to lower Cenomanian stages of the Cretaceous period, about 112 to 97 million years ago. This genus was first known from Egyptian remains discovered in 1912 and described by German...
- SpinostropheusSpinostropheusSpinostropheus is a genus of small ceratosaurian dinosaur that lived in the late Jurassic period of Niger. Once thought to be a species closely related to the abelisaurs , subsequent studies have confirmed the original interpretation as a basal ceratosaur closely related to Elaphrosaurus...
- SpinosuchusSpinosuchusSpinosuchus is a genus of extinct reptile of uncertain affinities, from the late Triassic of Texas. It has been assigned to a variety of groups over its history, from coelophysid dinosaur to pseudosuchian to uncertain theropod dinosaur to proterosuchid to possible trilophosaur...
– actually a non-dinosaurian reptileReptileReptiles are members of a class of air-breathing, ectothermic vertebrates which are characterized by laying shelled eggs , and having skin covered in scales and/or scutes. They are tetrapods, either having four limbs or being descended from four-limbed ancestors... - SpondylosomaSpondylosomaSpondylosoma is a genus of archosaur of uncertain affinities from the late Ladinian-age Middle Triassic Lower Santa Maria Formation in Geopark of Paleorrota, Brazil. Recent studies have gone back and forth on its identity, suggesting rauisuchian or basal saurischian dinosaur...
– possibly a rauisuchiaRauisuchiaRauisuchia is a group of predatory and mostly large Triassic archosaurs. As a clade, Rauisuchia includes these Triassic forms and all crocodylomorphs, which are descendants of Triassic rauisuchians. The group in its traditional sense is paraphyletic, because it does not include crocodylomorph...
n - SqualodonSqualodonSqualodon is an extinct genus of whales, belonging to the family Squalodontidae. Named by Grateloup in 1840, it was originally believed to be an iguanodontid dinosaur but has since been reclassified. The name Squalodon comes from Squalus, a genus of shark...
– actually a cetaceaCetaceaThe order Cetacea includes the marine mammals commonly known as whales, dolphins, and porpoises. Cetus is Latin and is used in biological names to mean "whale"; its original meaning, "large sea animal", was more general. It comes from Ancient Greek , meaning "whale" or "any huge fish or sea...
n - StaurikosaurusStaurikosaurusStaurikosaurus is a genus of herrerasaurid dinosaur from the Late Triassic of Brazil.-Discovery:The first known specimen of Staurikosaurus was recovered from the Paleontological Site Jazigo Cinco of the Santa Maria Formation in the geopark of paleorrota , Rio Grande do Sul, southern Brazil...
- StegocerasStegocerasStegoceras is a genus of plant-eating pachycephalosaurid dinosaur that lived in what is now North America during the Late Cretaceous period....
- StegopeltaStegopeltaStegopelta is a genus of armored dinosaur. It is based on a partial skeleton from the latest Albian-earliest Cenomanian-age Lower and Upper Cretaceous Belle Fourche Member of the Frontier Formation of Fremont County, Wyoming....
- StegosauridesStegosauridesStegosaurides is a genus of ankylosaurid dinosaur. It lived during the Late Cretaceous. Its fossils were found in the Xinminbao Formation near Heishan in Gansu Province in China. These fossils consist of fragmentary material, including spinal elements...
- "Stegosauroides" – misspelling of StegosauridesStegosauridesStegosaurides is a genus of ankylosaurid dinosaur. It lived during the Late Cretaceous. Its fossils were found in the Xinminbao Formation near Heishan in Gansu Province in China. These fossils consist of fragmentary material, including spinal elements...
- StegosaurusStegosaurusStegosaurus is a genus of armored stegosaurid dinosaur. They lived during the Late Jurassic period , some 155 to 150 million years ago in what is now western North America. In 2006, a specimen of Stegosaurus was announced from Portugal, showing that they were present in Europe as well...
- Stenonychosaurus – junior synonym of TroodonTroodonTroodon is a genus of relatively small, bird-like dinosaur from the Late Cretaceous period . Discovered in 1855, it was among the first dinosaurs found in North America...
- StenopelixStenopelixStenopelix is a genus of small ornithischian dinosaur from the Early Cretaceous of Germany. It was perhaps a basal ceratopsian from the Barremian Stage of the Cretaceous period, sometime between 130 and 125 million years ago...
- Stenotholus – junior synonym of StygimolochStygimolochStygimoloch is a putative genus of pachycephalosaurid dinosaur from the end of the Cretaceous period, roughly 65 million years ago...
- StephanosaurusStephanosaurusStephanosaurus is a dubious genus of hadrosaurid dinosaur, with a complicated taxonomic history.In 1902, Lawrence Lambe named a new set of hadrosaurid limb material and other bones from Alberta as Trachodon marginatus...
– junior synonym of LambeosaurusLambeosaurusLambeosaurus is a genus of hadrosaurid dinosaur that lived about 76 to 75 million years ago, in the Late Cretaceous Period of North America. This bipedal/quadrupedal, herbivorous dinosaur is known for its distinctive hollow cranial crest, which in the best-known species resembled a hatchet... - "Stereocephalus" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as EuoplocephalusEuoplocephalusEuoplocephalus was one of the largest genera of ankylosaurian dinosaurs, at about the size of a small elephant. It is also the ankylosaurian with the best fossil record, so its extensive spiked armor, low-slung body and great club-like tail are well documented.-Description:Among the... - "StereosaurusStereosaurus"Stereosaurus" is the name given to an as-yet undescribed genus of possible dinosaur or plesiosaur. Among the species are: "Stereosaurus platyomus", "S. cratynotus" and "S. stenomus", all coined by British paleontologist Harry Seeley, who considered them to be plesiosaurian, in 1869...
" – nomen nudum; possibly a plesiosaurPlesiosaurPlesiosauroidea is an extinct clade of carnivorous plesiosaur marine reptiles. Plesiosauroids, are known from the Jurassic and Cretaceous Periods... - Sterrholophus – junior synonym of TriceratopsTriceratopsTriceratops is a genus of herbivorous ceratopsid dinosaur which lived during the late Maastrichtian stage of the Late Cretaceous Period, around 68 to 65 million years ago in what is now North America. It was one of the last dinosaur genera to appear before the great Cretaceous–Paleogene...
- StokesosaurusStokesosaurusStokesosaurus is a genus of small , early tyrannosaur from the Late Jurassic period of Utah and England. It was named after Utah geologist William Lee Stokes...
- StormbergiaStormbergiaStormbergia is a genus of early ornithischian dinosaur known from the upper Elliot Formation of South Africa and Lesotho, named by Richard Butler in 2005...
- Strenusaurus – junior synonym of RiojasaurusRiojasaurusRiojasaurus was a herbivorous prosauropod dinosaur named after La Rioja Province in Argentina where it was found by José Bonaparte. It lived during the Late Triassic and grew to about long. Riojasaurus is the only known riojasaurid to live in South America.-Description:Riojasaurus had a heavy...
- StreptospondylusStreptospondylusStreptospondylus is a genus of tetanuran theropod dinosaur known from the Middle Jurassic period of France, 161 million years ago. It was a medium-sized predator.-Discovery and naming:...
- StruthiomimusStruthiomimusStruthiomimus is a genus of ornithomimid dinosaur from the late Cretaceous of Alberta, Canada. It was a long-legged, ostrich-like dinosaur.The bipedal Struthiomimus stood about long and tall at the hips and weighed around...
- StruthiosaurusStruthiosaurusStruthiosaurus is one of the smallest known and most basal genera of nodosaurid dinosaurs, from the Late Cretaceous period of Austria, Romania and France in Europe. It was protected by body armour...
- StygimolochStygimolochStygimoloch is a putative genus of pachycephalosaurid dinosaur from the end of the Cretaceous period, roughly 65 million years ago...
– possibly a sub-adult PachycephalosaurusPachycephalosaurusPachycephalosaurus is a genus of pachycephalosaurid dinosaur. It lived during the Late Cretaceous Period of what is now North America. Remains have been excavated in Montana, South Dakota, and Wyoming. It was an herbivorous or omnivorous creature which is only known from a single skull and a few... - Stygivenator – junior synonym of TyrannosaurusTyrannosaurusTyrannosaurus meaning "tyrant," and sauros meaning "lizard") is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex , commonly abbreviated to T. rex, is a fixture in popular culture. It lived throughout what is now western North America, with a much wider range than other...
- StyracosaurusStyracosaurusStyracosaurus was a genus of herbivorous ceratopsian dinosaur from the Cretaceous Period , about 76.5 to 75.0 million years ago...
- SuccinodonSuccinodonSuccinodon putzeri was the scientific name given by German paleontologist Friedrich von Huene to a fossil that he attributed to the sauropod family Titanosauridae. It was discovered in late-Cretaceous rock near Warsaw, Poland, in 1941...
– actually fossilFossilFossils are the preserved remains or traces of animals , plants, and other organisms from the remote past...
ized mollusc borings - SuchomimusSuchomimusSuchomimus is a genus of large spinosaurid dinosaur with a crocodile-like mouth that lived sometime between 121-112 million years ago, during the late Aptian stage of the Cretaceous period in Africa.-Description:...
- SuchosaurusSuchosaurusSuchosaurus is as a spinosaurid theropod dinosaur from Cretaceous England, originally believed to be a genus of crocodile. The type material consists of teeth. Two species, S. cultridens and S. girardi have been named, though the S. girardi material was reclassified by Buffetaut as Baryonyx...
– originally described as a crocodileCrocodileA crocodile is any species belonging to the family Crocodylidae . The term can also be used more loosely to include all extant members of the order Crocodilia: i.e...
, possibly a spinosaurid - SuchoprionSuchoprionSuchoprion is a dubious genus of phytosaurian archosaur known from poor remains from the Late Triassic of North America. It was once thought to be a dinosaur.-External links:***...
– actually a phytosaurPhytosaurPhytosaurs are an extinct group of large semi-aquatic Late Triassic archosaurs. Phytosaurs belong to the family Phytosauridae and the order Phytosauria. They were long-snouted and heavily armoured, bearing a remarkable resemblance to modern crocodiles in size, appearance, and lifestyle, an example... - "SugiyamasaurusSugiyamasaurus"Sugiyamasaurus" is the informal name given to an as yet undescribed genus of dinosaur known only from a few spatulate teeth. It was a sauropod, possibly a camarasaurid, which lived in Japan during the Late Cretaceous...
" – nomen nudum - SulaimanisaurusSulaimanisaurusSulaimanisaurus is a genus of titanosaurian sauropod from the Late Cretaceous of Balochistan, western Pakistan . The type species is S. gingerichi, described by M...
- "Sulaimansaurus" – misspelling of "SulaimanisaurusSulaimanisaurusSulaimanisaurus is a genus of titanosaurian sauropod from the Late Cretaceous of Balochistan, western Pakistan . The type species is S. gingerichi, described by M...
" - SupersaurusSupersaurusSupersaurus is a genus of diplodocid sauropod dinosaur discovered by Vivian Jones of Delta, Colorado, in the Upper Jurassic Morrison Formation of Colorado in 1972. The fossil remains came from the Brushy Basin Member of the formation, dating to about 153 million years ago...
- SuuwasseaSuuwasseaSuuwassea is a genus of diplodocoid sauropod dinosaur found in the Upper Jurassic strata of the Morrison Formation, located in southern Carbon County, Montana, USA. The fossil remains were recovered in a series of expeditions during a period spanning the years 1999 and 2000, described by J.D....
- SuzhousaurusSuzhousaurusSuzhousaurus is a genus of herbivorous therizinosauroid theropod dinosaur from the Early Cretaceous-age Xinminpu Group of the Yujingzi Basin, Gansu, China.-Discovery and naming:...
- Symphyrophus – junior synonym of CamptosaurusCamptosaurusCamptosaurus is a genus of plant-eating, beaked ornithischian dinosaurs of the Late Jurassic period of western North America. The name means 'flexible lizard', ....
- Syngonosaurus – junior synonym of AcanthopholisAcanthopholisAcanthopholis is a genus of ankylosaurian dinosaur in the family Nodosauridae that lived during the Early Cretaceous Period of England....
- "SyntarsusSyntarsus*Syntarsus is a beetle in the Colydiinae subfamily.*Megapnosaurus, a theropod dinosaur, was formerly called Syntarsus, and is occasionally still referred to as such....
" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as MegapnosaurusMegapnosaurusMegapnosaurus was a dinosaur of the theropod family Coelophysidae, formerly called Syntarsus , living during the Early Jurassic. It was renamed by American entomologist Dr. Michael Ivie , Polish Australian Dr... - Syrmosaurus – junior synonym of PinacosaurusPinacosaurusPinacosaurus is a genus of medium-sized ankylosaur dinosaurs that lived from the late Santonian to the late Campanian stages of the late Cretaceous Period , in Mongolia and China...
- "SzechuanoraptorSzechuanoraptor"Szechuanoraptor" is the informal name given to an as yet undescribed genus of dinosaur from the Middle Jurassic . It was a theropod which lived in what is now China...
" – nomen nudum - SzechuanosaurusSzechuanosaurusSzechuanosaurus is a dubious genus of theropod dinosaur from the Late Jurassic. This dinosaur lived in the Asia in the Oxfordian and early Kimmeridgian . It is based on four undiagnostic teeth from the Shangshaximiao Formation.-Discovery and species:Three species have been assigned to this genus...
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- TalarurusTalarurusTalarurus is a genus of hippopotamus-sized ankylosaurid dinosaur with heavy armour and a club tail. It was named by Evgeny Maleev in 1952.-Age and location:...
- TalenkauenTalenkauenTalenkauen is a genus of basal iguanodont dinosaur from the Maastrichtian-age Upper Cretaceous Pari Aike Formation of Lake Viedma, Santa Cruz, Argentina. It is based on MPM-10001, a partial articulated skeleton missing the rear part of the skull, the tail, and the hands...
- TalosTalos (dinosaur)Talos is an extinct genus of carnivorous bird-like theropod dinosaur, an advanced troodontid which lived during the late Cretaceous period in what is now Utah, USA....
- TangvayosaurusTangvayosaurusTangvayosaurus is a genus of sauropod dinosaur from the Aptian-Albian age Lower Cretaceous Grès Supérior Formation of Savannakhet, Laos...
- TaniusTaniusTanius is a genus of hadrosauroid dinosaur. It lived in the Late Cretaceous of the People's Republic of China.The type species, named and described in 1929 by Carl Wiman, is Tanius sinensis. The generic name honours the Chinese paleontologist Tan Xichou...
- TanycolagreusTanycolagreusTanycolagreus is a genus of coelurid theropod from the Late Jurassic of North America. The holotype is a partial skeleton recovered from the Bone Cabin Quarry West locality, Albany County, Wyoming, from the Morrison Formation...
- TanystropheusTanystropheusTanystropheus , was a 6 metre long reptile that dated from the Middle Triassic period. It is recognisable by its extremely elongated neck, which measured 3 metres long - longer than its body and tail combined. Despite this length, it had only ten neck vertebrae, each quite long...
– actually a prolacertiform archosauromorph - Tanystrosuchus – possible junior synonym of HalticosaurusHalticosaurusHalticosaurus is a genus of theropod dinosaur from the Late Triassic period . It was a coelophysoid found in the Middle Stubensandstein formation of what is present-day Germany...
or LiliensternusLiliensternusLiliensternus was a genus of coelophysoid dinosaur from the Late Triassic period, about 205 Ma.Liliensternus was originally named in 1934 by Friedrich von Huene as a second species of Halticosaurus, H. liliensterni, the specific name honouring the German amateur paleontologist, Dr... - TapinocephalusTapinocephalusTapinocephalus is a genus of large herbivorous dinocephalian that lived during the Middle Permian Period. These stocky, barrel-bodied animals were characterised by a massive bony skull roof and short weak snout...
– actually a therapsid - TapuiasaurusTapuiasaurusTapuiasaurus is a genus of herbivorous sauropod dinosaur. It is a nemegtosaurid titanosaur which lived during the Lower Cretaceous period in what is now Brazil. Its fossils, including a partial skeleton with a nearly complete skull, have been recovered from the Quiricó Formation at Minas Gerais,...
- TarascosaurusTarascosaurusTarascosaurus is a genus of, perhaps abelisaurid, theropod dinosaur from Late Cretaceous of France.After having in 1988 identified an upper jaw bone found near Pourcieux as belonging to a member of the Abelisauridae, French paleontologist Eric Buffetaut reviewed the known remains of larger...
- TarbosaurusTarbosaurusTarbosaurus is a genus of tyrannosaurid theropod dinosaur that flourished in Asia about 70 million years ago, at the end of the Late Cretaceous Period. Fossils have been recovered in Mongolia, with more fragmentary remains found further afield in parts of China. Although many species have been...
- TarchiaTarchiaTarchia is a genus of ankylosaurid dinosaur from the late Cretaceous of Mongolia. It is currently the geologically youngest known of all the Asian ankylosaurid dinosaurs and is represented by five or more specimens, including two complete skulls and one nearly complete postcranial skeleton...
- TastavinsaurusTastavinsaurusTastavinsaurus is a genus of sauropod dinosaur belonging to the Titanosauriformes. It is based on a partial skeleton from the Early Cretaceous of Spain. The type species is Tastavinsaurus sanzi, named in honor of the Rio Tastavins in Spain and Spanish paleontologist Jose Luis Sanz....
- TatankacephalusTatankacephalusTatankacephalus is a basal genus of ankylosaurid dinosaur that lived during the Early Cretaceous.Its fossil has been collected from the Cloverly Formation of central Montana during 1996, 1997 and 1998, in the region of the Middle Dome in Wheatland County. The type species is T. cooneyorum,...
- TatankaceratopsTatankaceratopsTatankaceratops is a controversial genus of herbivorous ceratopsian dinosaur. It is a small chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now South Dakota. It is known from a single partial skull which was collected from the Hell Creek Formation, dating to...
- TatisaurusTatisaurusTatisaurus is a genus of ornithischian dinosaur from the Early Jurassic from the Lower Lufeng Formation in Yunnan Province in China. Little is known as the remains are fragmentary.-Discovery and species:...
- TaveirosaurusTaveirosaurusTaveirosaurus is a genus of ornithischian dinosaur that lived in Europe during the Late Cretaceous. The genus is based solely on teeth....
- TawaTawa (dinosaur)Tawa is a genus of theropod dinosaur from the Late Triassic period. It is estimated to have been 2 m long...
- Tawasaurus – junior synonym of LufengosaurusLufengosaurusLufengosaurus is a genus of prosauropod dinosaur which lived during the Early Jurassic period in what is now southwestern China.-Discovery and species:...
- TazoudasaurusTazoudasaurusTazoudasaurus is a genus of vulcanodontid sauropod dinosaur hailing from the Early Jurassic Toundoute overthrust beds located in the High Moroccan Atlas Mountains. The remains, consisting of a partial adult skeleton and associated partial juvenile skeleton found in continental detrital sediments,...
- TechnosaurusTechnosaurusTechnosaurus is an extinct genus of Late Triassic archosauriform, perhaps a dinosauriform similar to Silesaurus, from the Norian age Upper Triassic Bull Canyon Formation of Texas...
– possibly a dinosauromorph - TecovasaurusTecovasaurusTecovasaurus is an archosauriform genus of unknown affinities Tecovasaurus (te-KOH-va-SAWR-us) is an archosauriform genus of unknown affinities Tecovasaurus (te-KOH-va-SAWR-us) is an archosauriform genus of unknown affinities (Irmis et al. (2007), initially described as a basal ornithischian...
– actually a non-dinosaurian archosauriform - TehuelchesaurusTehuelchesaurusTehuelchesaurus is a genus of dinosaur. It is named in honor of the Tehuelche people native to the Argentinian province of Chubut, where it was first found....
- TeinurosaurusTeinurosaurusTeinurosaurus is a genus of carnivorous theropod dinosaur. Teinurosaurus lived during the Late Jurassic in what is now Portugal. Only a single caudal vertebra has ever been discovered, and the genus is usually considered a nomen dubium...
- "TeleocraterTeleocrater"Teleocrater" is the informal name given to an as yet undescribed genus of prehistoric reptile. It was an archosaur originally thought to be a dinosaur. The name "Teleocrater" was coined by English paleontologist Alan Charig in his 1956 doctoral dissertation, but has never been formally published...
" – nomen nudum; possibly non-dinosaurian - TelmatosaurusTelmatosaurusTelmatosaurus is a genus of basal hadrosaurid dinosaur from the Late Cretaceous. It was a relatively small hadrosaur, approximately five meters long, found in what is now Romania....
- "Tenantosaurus" – nomen nudum; TenontosaurusTenontosaurusTenontosaurus is a genus of medium- to large-sized ornithopod dinosaur. The genus is known from the late Aptian to Albian ages of the middle Cretaceous period sediments of western North America, dating between 115 to 108 million years ago...
- "Tenchisaurus" – nomen nudum; actually an unpublished museum name for TianchisaurusTianchisaurusTianchisaurus is a genus of ankylosaurian dinosaur from the middle Jurassic Period of China. If it actually belongs to the family Ankylosauridae as proposed by Dong Zhiming, it would be the earliest member of that family...
- TendaguriaTendaguriaTendaguria is a genus of sauropod dinosaur from the Late Jurassic of Tanzania.It was a large sauropod from the Tendaguru fossil locality in Tanzania; based on two anterior dorsal vertebrae from Nambango, 15 kilometers southeast of Tendaguru Hill, Tanzania, probably in the Upper...
- TenontosaurusTenontosaurusTenontosaurus is a genus of medium- to large-sized ornithopod dinosaur. The genus is known from the late Aptian to Albian ages of the middle Cretaceous period sediments of western North America, dating between 115 to 108 million years ago...
- TeratophoneusTeratophoneusTeratophoneus is a genus of carnivorous tyrannosaurid theropod dinosaur which lived during the late Cretaceous period in what is now Utah, USA. It is known from an incomplete skull and postcranial skeleton recovered from the Kaiparowits Formation. Teratophoneus was named by Thomas D. Carr, Thomas E...
- TeratosaurusTeratosaurusTeratosaurus was a genus of rauisuchian known from the Triassic Stubensandstein of Germany...
– actually a non-dinosaurian archosaurArchosaurArchosaurs are a group of diapsid amniotes whose living representatives consist of modern birds and crocodilians. This group also includes all extinct non-avian dinosaurs, many extinct crocodilian relatives, and pterosaurs. Archosauria, the archosaur clade, is a crown group that includes the most... - TermatosaurusTermatosaurusTermatosaurus is a genus of phytosaur, an extinct crocodile-like aquatic animal, although twice it has been confused with dinosaurs . Its remains come from the Upper Triassic of Europe. Two species are known of this animal: the type species, Termatosaurus albertii, named by Meyer and T...
– actually a phytosaurPhytosaurPhytosaurs are an extinct group of large semi-aquatic Late Triassic archosaurs. Phytosaurs belong to the family Phytosauridae and the order Phytosauria. They were long-snouted and heavily armoured, bearing a remarkable resemblance to modern crocodiles in size, appearance, and lifestyle, an example...
, with some Internet sources accidentally transposing species of Tetragonosaurus onto it - TethyshadrosTethyshadrosTethyshadros is a genus of hadrosauroid dinosaur from Italy.The genus was named and described by Italian paleontologist Fabio Marco Dalla Vecchia in 2009. Its only and type species is Tethyshadros insularis. The genus name refers to the Tethys Ocean and the Hadrosauroidea...
- Tetragonosaurus – junior synonym of LambeosaurusLambeosaurusLambeosaurus is a genus of hadrosaurid dinosaur that lived about 76 to 75 million years ago, in the Late Cretaceous Period of North America. This bipedal/quadrupedal, herbivorous dinosaur is known for its distinctive hollow cranial crest, which in the best-known species resembled a hatchet...
- TexacephaleTexacephaleTexacephale is a genus of basal pachycephalosaurid dinosaur from the Campanian stage of the Late Cretaceous. The type species is Texacephale langstoni; its fossils were discovered in the Aguja Formation and described in 2010 by Longrich, Sankey and Tanke...
- TexasetesTexasetesTexasetes is a genus of ankylosaurian dinosaur from the late Lower Cretaceous of North America. This poorly known genus has been recovered from the Paw Paw Formation near Haslet, Tarrant County Texas, which has also produced the nodosaurid ankylosaur Pawpawsaurus...
- TeyuwasuTeyuwasuTeyuwasu is a dubious genus of dinosaur from the Late Triassic. Named by Edio-Ernst Kischlat in 1999, little is currently known about this genus; the type species, T. barbarenai, was named from leg bones discovered in geopark of paleorrota, Brazil. The specific name honors Dr. Mário Costa...
- ThecocoelurusThecocoelurusThecocoelurus is a genus of theropod dinosaur from the early Cretaceous period of England.Thecocoelurus is known only from half of a single cervical vertebra, discovered by the Rev. William Darwin Fox on the Isle of Wight during the 19th century. After his death the Fox Collection was acquired by...
- ThecodontosaurusThecodontosaurusThecodontosaurus is a genus of herbivorous basal sauropodomorph dinosaur which lived during the late Triassic period ....
- ThecospondylusThecospondylusThecospondylus is a dubious genus of dinosaur from the Early Cretaceous of EnglandDr. A.C. Horner, an amateur geologist living at Tonbridge, in the nineteenth century acquired a fossil found in the quarry of Southborough...
- TheiophytaliaTheiophytaliaTheiophytalia is a genus of herbivorous iguanodontian dinosaur from the lower Cretaceous period of Colorado.-Etymology:...
- TherizinosaurusTherizinosaurusTherizinosaurus is a genus of very large theropod dinosaur. Therizinosaurus lived in the late Cretaceous Period , and was one of the last and largest representatives of its unique group, the Therizinosauria...
- Therosaurus – junior synonym of IguanodonIguanodonIguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedal hypsilophodontids and the ornithopods' culmination in the duck-billed dinosaurs...
- ThescelosaurusThescelosaurusThescelosaurus was a genus of small ornithopod dinosaur that appeared at the very end of the Late Cretaceous period in North America. It was a member of the last dinosaurian fauna before the Cretaceous-Tertiary extinction event around 65.5 million years ago...
- ThespesiusThespesiusThespesius is a dubious genus of hadrosaurid dinosaur from the late Maastrichtian-age Upper Cretaceous Lance Formation of South Dakota....
– possibly EdmontosaurusEdmontosaurusEdmontosaurus is a genus of crestless hadrosaurid dinosaur. It contains two species: Edmontosaurus regalis and Edmontosaurus annectens. Fossils of E. regalis have been found in rocks of western North America that date from the late Campanian stage of the Cretaceous Period 73 million years ago,... - "ThotobolosaurusThotobolosaurus"Thotobolosaurus" is the name given to an as yet not formally described genus of dinosaur. It lived during the Late Triassic . "Thotobolosaurus" lived in what is present-day Lesotho, and is believed to have been a prosauropod or early sauropod. The suggested "type species", "Thotobolosaurus...
" – nomen nudum - TianchisaurusTianchisaurusTianchisaurus is a genus of ankylosaurian dinosaur from the middle Jurassic Period of China. If it actually belongs to the family Ankylosauridae as proposed by Dong Zhiming, it would be the earliest member of that family...
- "Tianchungosaurus" – nomen nudum; DianchungosaurusDianchungosaurusDianchungosaurus is an extinct genus of mesoeucrocodylian crocodylomorph from the Early Jurassic of China. It was previously considered a dinosaur, but it was recently reclassified as a mesoeucrocodylian by Paul Barrett and Xing Xu . It is probably the same animal as the informally named...
(crocodiliaCrocodiliaCrocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
n) - TianyulongTianyulongTianyulong is a genus of heterodontosaurid ornithischian dinosaur. The only species is T. confuciusi, whose remains were discovered in Jianchang County, Western Liaoning Province, China...
- TianyuraptorTianyuraptorTianyuraptor is a genus of short-armed dromaeosaurid dinosaur that lived during the Early Cretaceous, about 122 million years ago. Its remains have been found in western Liaoning, China. It was similar to other dromaeosaurids found in Liaoning, with the exception of being somewhat more primitive...
- TianzhenosaurusTianzhenosaurusTianzhenosaurus is a genus of ankylosaurid dinosaur discovered in Tianzhen County, at Kangdailiang near Zhaojiagou Village, in Shanxi Province, China, in the Late Cretaceous Huiquanpu Formation. Thus far, a virtually complete skull and postcranial skeleton have been assigned to the genus, which is...
- TichosteusTichosteusTichosteus is a genus of herbivorous dinosaur from the Late Jurassic. It is known only from vertebrae recovered from Kimmeridgian rocks in the Morrison Formation, Colorado....
- TienshanosaurusTienshanosaurusTienshanosaurus is a genus of dinosaur from the Late Jurassic. It was a sauropod which lived in what is now China....
- TimimusTimimusTimimus is a genus of small coelurosaurian theropod dinosaur, which was originally identified as an ornithomimosaur, from the Early Cretaceous of Australia.-Discovery and species:...
- TitanoceratopsTitanoceratopsTitanoceratops is a genus of herbivorous ceratopsian dinosaur. It was a giant chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now New Mexico, and the earliest known triceratopsin. It is known from the holotype OMNH 10165, a partial skeleton including...
- TitanosaurusTitanosaurusTitanosaurus is a genus of sauropod dinosaur, first described by Lydekker in 1877. It is known from the Maastrichtian Lameta Formation of India...
Lydekker, 1877 - "TitanosaurusAtlantosaurusAtlantosaurus is a dubious genus of sauropod dinosaur. The type specimen, found by Arthur Lakes in the Morrison Formation of Colorado, USA, was described by Othniel Charles Marsh, a Professor of Paleontology at Yale University , in 1877 as "Titanosaurus" montanus...
" Marsh, 1877 – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as AtlantosaurusAtlantosaurusAtlantosaurus is a dubious genus of sauropod dinosaur. The type specimen, found by Arthur Lakes in the Morrison Formation of Colorado, USA, was described by Othniel Charles Marsh, a Professor of Paleontology at Yale University , in 1877 as "Titanosaurus" montanus... - TochisaurusTochisaurusTochisaurus is a genus of small theropod dinosaur. It lived during the Late Cretaceous Period. Its fossils, consisting solely of the metatarsus, were found in Mongolia. The type species is T. nemegtensis, formalized by Kurzanov and Osmólska in 1991...
- "TomodonTomodonTomodon is a genus of colubrid snakes. Two species are currently recognized.* Tomodon dorsatus - Duméril, Bibron and Duméril, 1854 * Tomodon ocellatus - Duméril, Bibron and Duméril, 1854...
" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as DiplotomodonDiplotomodonDiplotomodon is a dubious genus of dinosaur from New Jersey. It is only known from a single tooth found in either the Navesink or Hornerstown Formation, dating to the Maastrichtian age of the late Cretaceous period... - TonganosaurusTonganosaurusTonganosaurus is a genus of mamenchisaurid sauropod dinosaur, similar to Omeisaurus. It is known from one specimen consisting of twenty vertebrae, a front limb and pectoral girdle, and a complete hind limb with partial hip. It lived during the early Jurassic period in what is now China...
- "TonouchisaurusTonouchisaurus"Tonouchisaurus" is the informal name given to an as yet undescribed genus of dinosaur from the Early Cretaceous Period. It was a theropod which lived in what is now Mongolia. The suggested "type species", "Tonouchisaurus mongoliensis", was coined by Barsbold in 1994. It was notably small: less...
" – nomen nudum - Torilion – junior synonym of BariliumBariliumBarilium is a genus of iguanodontian dinosaur which was first described as a species of Iguanodon by Richard Lydekker in 1888, the specific epithet honouring the discoverer Charles Dawson....
- TornieriaTornieriaTornieria is a genus of diplodocid sauropod dinosaur from Late Jurassic of Tanzania. It has a convoluted taxonomic history.-Discovery and naming:...
- TorosaurusTorosaurusTorosaurus is a genus of ceratopsid dinosaur that lived during the late Cretaceous period , between 70 and 65 million years ago. It possessed one of the largest skulls of any known land animal. The frilled skull reached in length...
– possibly the mature form of TriceratopsTriceratopsTriceratops is a genus of herbivorous ceratopsid dinosaur which lived during the late Maastrichtian stage of the Late Cretaceous Period, around 68 to 65 million years ago in what is now North America. It was one of the last dinosaur genera to appear before the great Cretaceous–Paleogene... - TorvosaurusTorvosaurusTorvosaurus is a genus of large theropod dinosaur that lived during the Late Jurassic period...
- TrachodonTrachodonTrachodon is a dubious genus of hadrosaurid dinosaur based on teeth from the Campanian-age Upper Cretaceous Judith River Formation of Montana, U.S.A...
- TraukutitanTraukutitanTraukutitan is a genus of possible lognkosaurian titanosaur sauropod which lived during the late Cretaceous .Fossils of Traukutitan were recovered from the lowermost section of the Bajo de la Carpa Formation in North Patagonia of Argentina and described but not named in 1993 by Leonardo Salgado...
- TrialestesTrialestesTrialestes is an extinct genus of Late Triassic crocodylomorph that lived in South America. It has been classified as a dinosaur in the past due it being adapted as a terrestrial, running carnivore. It is classified in Sphenosuchia, which were early relatives of crocodilians.- External links :* at...
– actually a crocodiliaCrocodiliaCrocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...
n - "Triassolestes" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as TrialestesTrialestesTrialestes is an extinct genus of Late Triassic crocodylomorph that lived in South America. It has been classified as a dinosaur in the past due it being adapted as a terrestrial, running carnivore. It is classified in Sphenosuchia, which were early relatives of crocodilians.- External links :* at... - Tribelesodon – actually TanystropheusTanystropheusTanystropheus , was a 6 metre long reptile that dated from the Middle Triassic period. It is recognisable by its extremely elongated neck, which measured 3 metres long - longer than its body and tail combined. Despite this length, it had only ten neck vertebrae, each quite long...
, a prolacertiform archosauromorph - TriceratopsTriceratopsTriceratops is a genus of herbivorous ceratopsid dinosaur which lived during the late Maastrichtian stage of the Late Cretaceous Period, around 68 to 65 million years ago in what is now North America. It was one of the last dinosaur genera to appear before the great Cretaceous–Paleogene...
- TrigonosaurusTrigonosaurusTrigonosaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous Period of what is now Brazil. The type species, Trigonosaurus pricei, was first described by Campos, Kellner, Bertini, and Santucci in 2005. It is based on two specimens, both consisting mainly of vertebrae...
- TrimucrodonTrimucrodonTrimucrodon is a genus of herbivorous dinosaur from the Late Jurassic or Early Cretaceous of what is now Portugal...
- TroodonTroodonTroodon is a genus of relatively small, bird-like dinosaur from the Late Cretaceous period . Discovered in 1855, it was among the first dinosaurs found in North America...
- TsaaganTsaaganTsaagan is a genus of carnivorous dromaeosaurid theropod dinosaur from the Djadokhta Formation of the late Cretaceous of Mongolia....
- TsagantegiaTsagantegiaTsagantegia is a genus of medium-sized ankylosaurid dinosaur from the Upper Cretaceous Mongolia, during the Cenomanian stage.The holotype specimen , a complete skull, was recovered from the Bayan Shireh Formation , at the Tsagan-Teg locality, Dzun-Bayan, in the southeastern Gobi Desert, Mongolia...
- TsintaosaurusTsintaosaurusTsintaosaurus is a genus of hadrosaurid dinosaur from China. It was about long, tall and weighed 3 tons. The type species is T. spinorhinus, first described by C. C...
- "TsuchikurasaurusTsuchikurasaurus"Tsuchikurasaurus" is the informal name given to an undescribed specimen of theropod dinosaur. It lived during the Late Cretaceous in what is now Japan. The Institute of Vertebrate Paleontology and Paleoanthropology in Beijing lists it as a possible neotheropod.-External links:*...
" – nomen nudum - TugulusaurusTugulusaurusTugulusaurus is a genus of theropod dinosaur from early Cretaceous Tugulu Group in the Urhe area of the People's Republic of China.From 1964 dinosaur fossils were excavated in the Junggar Basin of Xinjiang...
- TuojiangosaurusTuojiangosaurusTuojiangosaurus is a genus of stegosaurid dinosaur from the Late Jurassic Period, recovered from the Upper Shaximiao Formation of what is now Sichuan Province in China. Physically similar to the North American Stegosaurus, Tuojiangosaurus is the best understood of the Chinese stegosaurids...
- TuranoceratopsTuranoceratopsTuranoceratops is a genus of ceratopsian dinosaur, possibly a ceratopsid. Its fossil remains were recovered from the Bissekty Formation of Uzbekistan, dating to the late Cretaceous Period about 90 million years ago...
- TuriasaurusTuriasaurusTuriasaurus is a genus of sauropod dinosaur from the Jurassic-Cretaceous boundary...
- TylocephaleTylocephaleTylocephale is a genus of pachycephalosaurid dinosaur from the Late Cretaceous Period. It was a herbivorous dinosaur estimated to have been about 1.4 metres in length...
- Tylosteus – synonym of PachycephalosaurusPachycephalosaurusPachycephalosaurus is a genus of pachycephalosaurid dinosaur. It lived during the Late Cretaceous Period of what is now North America. Remains have been excavated in Montana, South Dakota, and Wyoming. It was an herbivorous or omnivorous creature which is only known from a single skull and a few...
- TyrannosaurusTyrannosaurusTyrannosaurus meaning "tyrant," and sauros meaning "lizard") is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex , commonly abbreviated to T. rex, is a fixture in popular culture. It lived throughout what is now western North America, with a much wider range than other...
- TyrannotitanTyrannotitanTyrannotitan is a genus of huge bipedal carnivorous dinosaur of the carcharodontosaurid family from the Aptian stage of the early Cretaceous period, discovered in Argentina. It is closely related to other giant predators like Giganotosaurus and Carcharodontosaurus...
- "Tyreophorus" – nomen nudum, probably a typographical error for "thyreophoraThyreophoraThe Thyreophora were a subgroup of the ornithischian dinosaurs...
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- UberabatitanUberabatitanUberabatitan is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous of Brazil. It is known from bones including neck, back, and tail vertebrae, pelvic bones, and limb bones...
- UdanoceratopsUdanoceratopsUdanoceratops is a genus of ceratopsian dinosaur. It lived during the Late Cretaceous Period in the late Santonian or early Campanian faunal stages...
- Ugrosaurus – probably junior synonym of TriceratopsTriceratopsTriceratops is a genus of herbivorous ceratopsid dinosaur which lived during the late Maastrichtian stage of the Late Cretaceous Period, around 68 to 65 million years ago in what is now North America. It was one of the last dinosaur genera to appear before the great Cretaceous–Paleogene...
- Uintasaurus – junior synonym of CamarasaurusCamarasaurusCamarasaurus meaning 'chambered lizard', referring to the hollow chambers in its vertebrae was a genus of quadrupedal, herbivorous dinosaurs. It was the most common of the giant sauropods to be found in North America...
- Ultrasauros – junior synonym of SupersaurusSupersaurusSupersaurus is a genus of diplodocid sauropod dinosaur discovered by Vivian Jones of Delta, Colorado, in the Upper Jurassic Morrison Formation of Colorado in 1972. The fossil remains came from the Brushy Basin Member of the formation, dating to about 153 million years ago...
- UltrasaurusUltrasaurusUltrasaurus is a genus of sauropod dinosaur discovered by Haang Mook Kim in South Korea. However, the name was first used unofficially in 1979 by Jim Jensen to describe a set of giant dinosaur bones he discovered in the United States...
H. M. Kim, 1983 - "Ultrasaurus" Jensen, 1985 – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as Ultrasauros - Umarsaurus – nomen nudum; BarsboldiaBarsboldiaBarsboldia was a genus of large hadrosaurid dinosaur from the early Maastrichtian Nemegt Formation of Ömnogöv', Mongolia. It is known from a partial vertebral column, partial pelvis, and some ribs...
- UnaysaurusUnaysaurusUnaysaurus is a genus of sauropodomorph dinosaur, and is one of the oldest dinosaurs known. It was discovered in southern Brazil,in the geopark of paleorrota, in 1998, and announced in a press conference on Thursday, December 3, 2004...
- UnenlagiaUnenlagiaUnenlagia is a genus of, possibly dromaeosaurid, theropod dinosaur from the Late Cretaceous of Argentina....
- "UnicerosaurusUnicerosaurus"Unicerosaurus" is a nomen nudum coined by creation scientist Carl Baugh. It has never been formally described. Baugh had claimed that "Unicerosaurus" was a dinosaur, but this was rejected by Canadian geologist John R. Armstrong in a 1987 article, which identified the fossil as the neural spine of...
" – nomen nudum, actually a fishFishFish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups... - UnquillosaurusUnquillosaurusUnquillosaurus is a genus of maniraptoran dinosaur from the late Cretaceous Period, discovered in Argentina. Known only from a single fossilized pubis , its total body length may have reached 2-3 meters .The type species Unquillosaurus ceibalii was described by Jaime Eduardo Powell in 1979...
- UrbacodonUrbacodonUrbacodon is a genus of troodontid dinosaur, a type of small carnivore. It lived in Uzbekistan during the early Late Cretaceous Period, about 95 million years ago. The first part of the name Urbacodon is an acronym, honouring the Uzbek, Russian, British, American and Canadian scientists who...
- UtahceratopsUtahceratopsUtahceratops is a genus of herbivorous ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now Utah. Its fossils have been recovered from the Kaiparowits Formation. It was first named by Scott D. Sampson, Mark A. Loewen, Andrew A....
- UtahraptorUtahraptorUtahraptor is a genus of theropod dinosaurs, including the largest known members of the family Dromaeosauridae. Fossil specimens date to the upper Barremian stage of the early Cretaceous period...
- UteodonUteodonUteodon is a genus of herbivorous iguanodontian dinosaur. It is a basal iguanodontian which lived during the upper Jurassic period in what is now Uintah County, Utah. It is known from the middle of the Brushy Basin Member, Morrison Formation. This genus was named by Andrew T. McDonald in 2011 and...
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- VagaceratopsVagaceratopsVagaceratops is a genus of herbivorous ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now Alberta. Its fossils have been recovered from the Upper Dinosaur Park Formation...
- ValdoraptorValdoraptorValdoraptor is a genus of theropod dinosaur from the Early Cretaceous. Its fossils were found in England. It is known only from bones of the feet....
- ValdosaurusValdosaurusValdosaurus is a genus of bipedal herbivorous iguanodont ornithopod dinosaur found on the Isle of Wight and elsewhere in England. It lived during the Early Cretaceous.-Discovery and naming:...
- VariraptorVariraptorVariraptor is a genus of coelurosaurian theropod dinosaur from the Late Cretaceous of France.Between 1992 and 1995 amateur paleontologists Patrick Méchin and Annie Méchin-Salessy uncovered the remains of a small theropod in the Grès à Reptiles Formation at La Bastide Neuve, near Fox-Amphoux...
- Vectensia – junior synonym of HylaeosaurusHylaeosaurusHylaeosaurus is the most obscure of the three animals used by Sir Richard Owen to first define the new group Dinosauria, in 1842. The original specimen, recovered by Gideon Mantell from the Tilgate Forest in the south of England in 1832, now resides in the Natural History Museum of London, where...
- Vectisaurus – junior synonym of IguanodonIguanodonIguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedal hypsilophodontids and the ornithopods' culmination in the duck-billed dinosaurs...
- VelafronsVelafronsVelafrons is a genus of lambeosaurine hadrosaurid dinosaur from the Late Cretaceous of Mexico. It is known from a mostly complete skull and partial skeleton of a juvenile individual, with a bony crest on the forehead...
- VelocipesVelocipesVelocipes is a possible theropod dinosaur genus from the Late Triassic. Its fossils were found in Poland. It is not well known: in fact, the fossils are so poorly preserved that identification remains unclear. The type species, V. guerichi, was first described by von Huene in 1932...
- VelociraptorVelociraptorVelociraptor is a genus of dromaeosaurid theropod dinosaur that existed approximately 75 to 71 million years ago during the later part of the Cretaceous Period. Two species are currently recognized, although others have been assigned in the past. The type species is V. mongoliensis; fossils...
- VelocisaurusVelocisaurusVelocisaurus is a genus of ceratosaurian theropod dinosaur from the Cretaceous period of Argentina.In 1985 Oscar de Ferrariis and Zulma Gasparini uncovered fossils at Boca del Sapo in Neuquén province of Patagonia from layers of the Bajo de la Carpa Formation, dating from the Santonian. Among them...
- VenaticosuchusVenaticosuchusVenaticosuchus is a genus of Late Triassic quadrupedal crurotarsan archosaur. Originally it was thought to be the ancestor to the carnosaur dinosaurs ; however, now it is known to be more closely related to crocodilians than dinosaurs...
– actually a non-dinosaurian archosaurArchosaurArchosaurs are a group of diapsid amniotes whose living representatives consist of modern birds and crocodilians. This group also includes all extinct non-avian dinosaurs, many extinct crocodilian relatives, and pterosaurs. Archosauria, the archosaur clade, is a crown group that includes the most... - VenenosaurusVenenosaurusVenenosaurus named after the Poison Strip Member of the Cedar Mountain Formation in Utah, where the fossils were discovered by a Denver Museum of Natural History volunteer Tony DiCroce in 1998. Venenosaurus dicrocei was first described as a new species in 2001 by Virginia Tidwell, Kenneth...
- VitakridrindaVitakridrindaVitakridrinda is a genus of abelisaurid theropod dinosaur from the Late Cretaceous of Balochistan, western Pakistan. The type species is V. sulaimani. The discovery was made near Vitariki by a team of palaeontologists from the Geological Survey of Pakistan,in rocks from the Maastrichtian-age...
- "Vitaridrinda" – misspelling of VitakridrindaVitakridrindaVitakridrinda is a genus of abelisaurid theropod dinosaur from the Late Cretaceous of Balochistan, western Pakistan. The type species is V. sulaimani. The discovery was made near Vitariki by a team of palaeontologists from the Geological Survey of Pakistan,in rocks from the Maastrichtian-age...
- VolkheimeriaVolkheimeriaVolkheimeria was a brachiosaurid sauropod dinosaur. It lived during the Middle Jurassic, approximately 160 million years ago. Fossils of Volkheimeria have been found in Argentina. The type species, V. chubutensis, was described by José Bonaparte in 1979.-References:* at Dino Russ's Lair....
- VulcanodonVulcanodonVulcanodon was a relatively small early sauropod dinosaur genus from the Early Jurassic of southern Africa. About 6.5 metres long, Vulcanodon was herbivorous and had unusually long bones of the first toe and large claws on the inside toes. The type species, V. karibaensis, was formally...
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- Wadhurstia – junior synonym of HypselospinusHypselospinusHypselospinus is a genus of iguanodontian dinosaur which was first described as a species of Iguanodon by Richard Lydekker in 1889, the specific name honouring William Henry Fitton....
- WakinosaurusWakinosaurusWakinosaurus is a genus of theropod dinosaur from the Early Cretaceous Sengoku Formation of Kyushu, Japan. The genus is a tooth taxon, based solely on a tooth....
- WalgettosuchusWalgettosuchusWalgettosuchus is a dubious genus of theropod dinosaur.In 1905 an opalised vertebra of a theropod dinosaur was found near Wollaston, at Lightning Ridge in New South Wales...
- "Walkeria" – preoccupiedInternational Code of Zoological NomenclatureThe International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...
name, now known as AlwalkeriaAlwalkeriaAlwalkeria is a genus of basal saurischian dinosaur from the Late Triassic of India. It was a small bipedal omnivore.This dinosaur was originally named Walkeria maleriensis by Sankar Chatterjee in 1987, in honor of famous British paleontologist Alick Walker and the Maleri Formation, in which its... - "Walkersaurus" – nomen nudum; DuriavenatorDuriavenatorDuriavenator is a genus of theropod dinosaur described in 2008 by Roger Benson. The type species is D. hesperis, formerly known as Megalosaurus hesperis. Duriavenator lived during the Bajocian stage, around 170 million years ago, making it one of the oldest-known tetanurans. The genus name combines...
- "Wangonisaurus" – nomen nudum, probably BrachiosaurusBrachiosaurusBrachiosaurus is a genus of sauropod dinosaur from the Jurassic Morrison Formation of North America. It was first described by Elmer S. Riggs in 1903 from fossils found in the Grand River Canyon of western Colorado, in the United States. Riggs named the dinosaur Brachiosaurus altithorax,...
or Giraffatitan - WannanosaurusWannanosaurusWannanosaurus is a genus of basal pachycephalosaurian dinosaur from the Campanian-age Upper Cretaceous Xiaoyan Formation, about 80 million years ago in what is now Anhui, China...
- WellnhoferiaWellnhoferiaWellnhoferia is a genus of early prehistoric bird closely related to Archaeopteryx. It lived in what is now Germany, during the Late Jurassic. While Wellnhoferia was similar to Archaeopteryx, it had a shorter tail and its fourth toe was shorter than in Archaeopteryx...
– possible junior synonym of ArchaeopteryxArchaeopteryxArchaeopteryx , sometimes referred to by its German name Urvogel , is a genus of theropod dinosaur that is closely related to birds. The name derives from the Ancient Greek meaning "ancient", and , meaning "feather" or "wing"... - WillinakaqeWillinakaqeWillinakaqe is an extinct genus of saurolophine hadrosaurid dinosaur which lived during the late Cretaceous of the Río Negro Province of southern Argentina....
- WintonotitanWintonotitanWintonotitan is a genus of titanosauriform dinosaur from late Albian -age rocks of Australia. It is known from partial postcranial remains.-Description and history:...
- WuerhosaurusWuerhosaurusWuerhosaurus is a genus of stegosaurid dinosaur from the Early Cretaceous Period of China. As such, it was one of the last genera of stegosaurians known to have existed, since most others lived in the late Jurassic.-Discovery and species:...
- WulagasaurusWulagasaurusWulagasaurus is a genus of hadrosaurine hadrosaurid dinosaur from the Late Cretaceous of Heilongjiang, China. Its remains were found in a bonebed in the latest Maastrichtian-age Yuliangze Formation, dated to 65.5 million years ago...
- WyleyiaWyleyiaWyleyia is a prehistoric bird genus with a single species, Wyleyia valdensis, known from the Early Cretaceous of England. Even this is only known from a single damaged right humerus. It has been named to honor J. F. Wyley, who found the specimen in the Weald Clay deposits of Henfield in Sussex...
– probably a birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from... - "WyomingraptorWyomingraptor"Wyomingraptor" is the name unofficially ascribed to an allosaurid dinosaur from the Morrison Formation of the Late Jurassic. The few remains unearthed are labeled as Allosaurus in the Tate Museum. Robert Bakker, who discovered the fossils in 1997, has proposed the new name...
" – nomen nudum
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- XenoposeidonXenoposeidonXenoposeidon is a genus of sauropod dinosaur from the Early Cretaceous of England, living about 140 million years ago. It is known from a single partial vertebra with unusual features, unlike those of other sauropods...
- XenotarsosaurusXenotarsosaurusXenotarsosaurus is a genus of abelisaurid theropod dinosaur that lived during the Late Cretaceous of Argentina.In 1980 geologist Juan Carlos Sciutto discovered a rich fossil site six kilometres north of the Ocho Hermanos ranch in Chubut province. Among the fossils found there were some theropod...
- XianshanosaurusXianshanosaurusXianshanosaurus is a genus of sauropod dinosaur from the early Late Cretaceous of what is now China. It was described in 2009 by a team of Chinese paleontologists. The type species is X. shijiagouensis....
- XiaosaurusXiaosaurusXiaosaurus , is a genus of small herbivorous dinosaur from the middle Jurassic, approximately 169 to 163 mya. Xiaosaurus lived in what is now the Sichuan Basin of China....
- XiaotingiaXiaotingiaXiaotingia is a genus of bird-like theropod dinosaur from early Late Jurassic deposits of western Liaoning, China, containing a single species, Xiaotingia zhengi.-Discovery:...
- XinjiangovenatorXinjiangovenatorXinjiangovenator is a genus of coelurosaurian dinosaur of the Valanginian to Albian stages of the Early Cretaceous period. Its remains were found in the Lianmuqin Formation of Wuerho, Xinjiang, China, and were first described by Dong Zhiming...
- XiongguanlongXiongguanlongXiongguanlong is a genus of tyrannosauroid dinosaur that lived in the Early Cretaceous of what is now China. The type species is X. baimoensis, described online in 2009 by a group of researchers from China and the United States, and formally published in January 2010. The genus name refers to the...
- XixianykusXixianykusXixianykus is a genus of alvarezsauroid theropod dinosaur from the late Cretaceous period of China. It was discovered in Xixia County in Henan, China...
- XixiasaurusXixiasaurusXixiasaurus is a genus of troodontid dinosaur described in 2010. The type species is X. henanensis. Fossils of Xixiasaurus were discovered in central China, in the Majiacun Formation of Henan, and are believed to have been from the Late Cretaceous...
- XixiposaurusXixiposaurusXixiposaurus is a genus of prosauropod dinosaur which existed in what is now Lower Lufeng Formation, China during the lower Jurassic period. It was first named by Sekiya Toru in 2010 and the type species is Xixiposaurus suni....
- XuanhanosaurusXuanhanosaurusXuanhanosaurus is a genus of theropod dinosaur which lived during the Jurassic of China.The type species Xuanhanosaurus qilixiaensis was named by Dong Zhiming in 1984. The generic name refers to Xuanhan County in Sichuan. The specific name is derived from the town of Qilixia...
- Xuanhuaceratops
- "XuanhuasaurusXuanhuasaurusXuanhuaceratops is a genus of dinosaur from the Late Jurassic Period . A member of the family Chaoyangsauridae, it was one of the earliest ceratopsians...
" – nomen nudum; Xuanhuaceratops - XuwulongXuwulongXuwulong is a genus of iguanodontoid dinosaur from the Early Cretaceous period. It is a basal hadrosauriform which lived during the early Cretaceous period in what is now Yujingzi Basin in the Jiuquan area, Gansu Province of northwestern China...
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- Yaleosaurus – junior synonym of AnchisaurusAnchisaurusAnchisaurus is a genus of basal sauropodomorph, and was an early herbivorous dinosaur. Until recently it was classed as a member of Prosauropoda. The name comes from the Greek αγχι/agkhi...
- YamaceratopsYamaceratopsYamaceratops is a genus of dinosaur from the Late Cretaceous. It was a primitive ceratopsian which lived in the Gobi Desert of Mongolia. Initially, the rocks it was found in were thought to be from the Early Cretaceous, but the age was reevaluted in 2009.The type species, Yamaceratops...
- YandusaurusYandusaurusYandusaurus is a genus of herbivorous basal euornithopod dinosaur from the Bathonian age of China.-Discovery and naming:...
- YangchuanosaurusYangchuanosaurusYangchuanosaurus was a theropod dinosaur that lived in China during the late Oxfordian stage of the Late Jurassic, and was similar in size and appearance to its North American contemporary, Allosaurus...
- YanornisYanornisYanornis is an extinct genus of omnivorous Early Cretaceous birds, thought to be closely related to the common ancestor of all modern birds. One species, Yanornis martini,...
– actually a birdBirdBirds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from... - YaverlandiaYaverlandiaYaverlandia is a genus of theropod dinosaur. Known from a partial fossil skull found in Lower Cretaceous strata on the Isle of Wight, it was described as the earliest known member of the pachycephalosaurid family, but recent research by Darren Naish shows it to have actually been a theropod,...
- Yaxartosaurus – misspelling of JaxartosaurusJaxartosaurusJaxartosaurus is a genus of hadrosaurid dinosaur similar to Corythosaurus which lived during the Late Cretaceous. Its fossils were found in Kazakhstan and China. It had a large, helmet-like crest that it may have used for visual identification, or to vocalize with members of the same herd.The type...
- "Yezosaurus" – nomen nudum; non-dinosaurian
- "YibinosaurusYibinosaurus"Yibinosaurus" is the informal name given to an as yet undescribed genus of herbivorous dinosaur from the Early Jurassic. It was a sauropod which lived in what is now Sichuan, China. The suggested "type species", "Yibinosaurus zhoui", has not been formally described yet, but the formal publication...
" – nomen nudum - YimenosaurusYimenosaurusYimenosaurus is a genus of prosauropod dinosaur from the Early Jurassic. Fossils from several individuals were recovered from Yimen, China, and the type species Y. youngi was named by Bai, Yang & Wang in 1990. Reconstructions are based on mostly complete skeletons, missing only parts of the...
- "YingshanosaurusYingshanosaurus"Yingshanosaurus" is the informal name given to a genus of quadrupedal dinosaur from the Late Jurassic, around 150 million years ago. It was a stegosaurian which lived in what is now China. The suggested "type species", coined by Zhou in 1984, is "Yingshanosaurus jichuanensis", but this is...
" – nomen nudum - YinlongYinlongYinlong is a genus of basal ceratopsian dinosaur from the Late Jurassic Period of central Asia. It was a small, primarily bipedal herbivore, approximately 1.2 meters long...
- YixianosaurusYixianosaurusYixianosaurus is a maniraptoran theropod dinosaur genus from the Early Cretaceous of China.The type species, Yixianosaurus longimanus, was formally named and described by Xu Xing and Wang Xiaolin in 2003. Its partial skeleton was discovered in 2001, in Liaoning at Wangjiagou in northeastern China....
- "YizhousaurusYizhousaurus"Yizhousaurus" is an informally named genus of basal sauropod dinosaur which existed in what is now Lower Lufeng Formation, Yunnan Province of southern China during the lower Jurassic period. Identified from a nearly complete and exquisitely preserved skeleton, it is the most complete basal...
" – nomen nudum - YuanmousaurusYuanmousaurusYuanmousaurus was a sauropod dinosaur from the Middle Jurassic period of China. It is known from incomplete remains, but probably reached about 17 meters in length...
- "Yubasaurus" – nomen nudum; YandusaurusYandusaurusYandusaurus is a genus of herbivorous basal euornithopod dinosaur from the Bathonian age of China.-Discovery and naming:...
- YueosaurusYueosaurusYueosaurus is an extinct genus of basal ornithopod dinosaur known from Zhejiang Province, China.-Description:Yueosaurus is known only from the holotype ZMNH M8620, an articulated, partial but well preserved postcranial skeleton which includes cervical, dorsal and caudal vertebra, scapular,...
- YunnanosaurusYunnanosaurusYunnanosaurus is a genus of prosauropod dinosaur from the Early to Middle Jurassic Period, a position in time that makes it one of the last prosauropods. It is closely related to Lufengosaurus...
- "YunxiansaurusYunxiansaurus"Yunxiansaurus" is the informal name given to an as-yet undescribed genus of dinosaur from the Late Cretaceous. It was a sauropod which lived in what is now China. The suggested "type species", "Yunxiansaurus hubei", was coined by Chinese paleontologist Zhou in 2005. The fossils of "Yunxiansaurus"...
" – nomen nudum
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- ZalmoxesZalmoxesZalmoxes is a genus of herbivorous dinosaur from the Late Cretaceous of what is now Romania. It is classified as a rhabdodontid iguanodont....
- ZanabazarZanabazar (dinosaur)Zanabazar is a genus of troodontid dinosaur, which lived during the Late Cretaceous period in Mongolia.Fossils of this theropod have been found in the Nemegt Formation of Mongolia. Originally classified as a new species of the genus Saurornithoides by Rinchen Barsbold in 1974, based on a small...
- ZanclodonZanclodonZanclodon is an extinct genus of archosaurian reptile endemic to what would have been Europe during the Middle Triassic-Late Triassic epochs ....
– non-dinosaurian (in part), some species referred to MegalosaurusMegalosaurusMegalosaurus is a genus of large meat-eating theropod dinosaurs of the Middle Jurassic period of Europe...
and PlateosaurusPlateosaurusPlateosaurus is a genus of plateosaurid dinosaur that lived during the Late Triassic period, around 216 to 199 million years ago, in what is now Central and Northern Europe. Plateosaurus is a basal sauropodomorph dinosaur, a so-called "prosauropod"... - ZapalasaurusZapalasaurusZapalasaurus is a genus of dinosaur described by Leonardo Salgado, Ismar de Souza Carvalho and Alberto C. Garrido, in 2006. The type species, Zapalasaurus bonapartei, was found in Neuquén Province, Argentina. It was a diplodocoid, a long-necked herbivore, and it lived during the Early Cretaceous...
- Zapsalis – junior synonym of ParonychodonParonychodonParonychodon was a theropod dinosaur genus. It is a tooth taxon, considered dubious because of the fragmentary nature of the fossils, which include "buckets" of teeth but no other remains...
- ZatomusZatomusZatomus was a genus of rauisuchian from the Late Triassic. It lived in what is now present-day North Carolina. It is classified as a rauisuchian, a type of large carnivorous thecodontian archosaur, and was once thought to be a dinosaur.-External links:...
– actually a non-dinosaurian archosaurArchosaurArchosaurs are a group of diapsid amniotes whose living representatives consist of modern birds and crocodilians. This group also includes all extinct non-avian dinosaurs, many extinct crocodilian relatives, and pterosaurs. Archosauria, the archosaur clade, is a crown group that includes the most... - ZephyrosaurusZephyrosaurusZephyrosaurus is a genus of hypsilophodont ornithopod dinosaur. It is based on a partial skull and postcranial fragments discovered in the Aptian-Albian-age Lower Cretaceous Cloverly Formation of Carbon County, Montana...
- ZhejiangosaurusZhejiangosaurusZhejiangosaurus is an extinct genus of nodosaurid dinosaur from the Upper Cretaceous of Zhejiang, eastern China...
- ZhongyuansaurusZhongyuansaurusZhongyuansaurus is an extinct genus of ankylosaurid ankylosaurian dinosaur from the Cretaceous of Ruyang, Henan, China. It is known from remains including skull, arm, pelvic, and tail bones. It is distinguished by characteristics such as a flat roof to the skull, a straight ischium, and the...
- ZhuchengceratopsZhuchengceratopsZhuchengceratops is a genus of herbivorous ceratopsian dinosaur. It is a derived leptoceratopsid ceratopsian which lived during the Late Cretaceous period in what is now Kugou, Zhucheng County, China. It is known from a partial articulated skeleton including vertebrae, ribs, teeth, and parts of...
- Zhuchengosaurus - junior synonym of ShantungosaurusShantungosaurusShantungosaurus, meaning "Shandong Lizard", is a genus of saurolophine hadrosaurid dinosaurs found in the Late Cretaceous Wangshi Formation of the Shandong Peninsula in China.-Description:...
- ZhuchengtyrannusZhuchengtyrannusZhuchengtyrannus is an extinct genus of carnivorous theropod dinosaur from the Late Cretaceous period. It is a tyrannosaurine tyrannosaurid which lived during the late Cretaceous period in what is now Zhucheng, Shandong Province of China...
- ZigongosaurusZigongosaurusZigongosaurus is a genus of sauropod dinosaur from the Middle Jurassic-Late Jurassic-age Shaximiao Formation of Zigong, Sichuan, China...
– possible junior synonym of MamenchisaurusMamenchisaurusMamenchisaurus was a plant-eating four-legged dinosaur, known for its remarkably long neck which made up half its total length. It is known from numerous species which ranged in time from 160 to 145 million years ago, from the Oxfordian to Tithonian ages of the late Jurassic Period of... - ZizhongosaurusZizhongosaurusZizhongosaurus is a genus of basal herbivorous sauropod dinosaur which lived in the Early Jurassic Period of China. It was a large-bodied herbivore characterized by a long neck....
- ZuniceratopsZuniceratopsZuniceratops was a ceratopsian dinosaur from the mid Turonian of the Late Cretaceous Period of what is now New Mexico, United States...
- ZuolongZuolongZuolong is a genus of coelurosaur dinosaur which existed in what is now Wucaiwan, Xinjiang Autonomous Region of China during the Late Jurassic period . The holotype fossil of Zuolong, IVPP V15912, a partial skeleton with skull, was discovered in 2001 in China, in the upper part of the...
- ZupaysaurusZupaysaurusZupaysaurus is a genus of early theropod dinosaur living during the Rhaetian stage of the Late Triassic to Hettangian stage of the Early Jurassic of what is now Argentina. Although a full skeleton has not yet been discovered, Zupaysaurus can be considered a bipedal predator, up to 4 meters ...
See also
- Dinosaur classificationDinosaur classificationDinosaur classification began in 1842 when Sir Richard Owen placed Iguanodon, Megalosaurus, and Hylaeosaurus in "a distinct tribe or suborder of Saurian Reptiles, for which I would propose the name of Dinosauria." In 1887 and 1888 Harry Seeley divided dinosaurs into the two orders Saurischia and...
- List of dinosaur ichnogenera
- List of ichthyosaurs
- List of plesiosaurs
- List of pterosaurs
- List of South American dinosaurs
- List of North American dinosaurs
- List of African dinosaurs
- List of Asian dinosaurs
- List of European dinosaurs
- List of Indian and Madagascan dinosaurs
- List of Australian and Antarctic dinosaurs