List of plesiosaurs - AbsoluteAstronomy.com

This list of plesiosaurs is a comprehensive listing of all genera

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

that have ever been included in the order Plesiosauria

Plesiosauria

Plesiosauria is an order of Mesozoic marine reptiles. Plesiosaurs first appeared in the Early Jurassic Period and became especially common during the Jurassic Period, thriving until the K-T extinction at the end of the Cretaceous Period.The name "plesiosaur" is used to refer to the order...

, excluding 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 of more established names, and genera that are no longer considered plesiosaurs.

Scope and terminology

There is no official, canonical list of plesiosaur genera but one of the most thorough attempts can be found on the Plesiosauria section of Mikko Haaramo's Phylogeny
Archive; also pertinent is the Plesiosaur Genera section at Adam Stuart Smith's Plesiosaur Directory.

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 synonym: A name which describes the same taxon as a previously published name. If two or more genera are formally designated and the type specimens 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, 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 nudum
Nomen nudum
The 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. In this case, these nomina nuda will be deleted from this list in favor of the published name.
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. As preoccupied names are not valid generic names, they will also go unitalicized on this list.
Nomen dubium
Nomen dubium
In 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, this term is not used on this list.

The list

Genus	Authors	Year	Status	Age	Location	Notes
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Alexeyisaurus Alexeyisaurus Alexeyisaurus is an extinct genus of elasmosaurid plesiosaur known from the upper Triassic of Wilczek Formation, Wilczek Land, of Franz Josef Land, Russia. It was first named by A. G. Sennikov and M. S. Arkhangelsky in 2010 and the type species is Alexeyisaurus karnoushenkoi....	Sennikov Arkhangelsky	2010 2010 in paleontology -Anomalocaridids:-Newly named crustaceans:-Newly named insects:* A new family, Cascopleciidae, is published by Poinar Jr.* A new family of ceraphronoid Hymenopters, Radiophronidae, is published by Ortega-Blanco, Rasnitsyn, and Delclòs....	Valid.	uT	Europe Europe Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...
"Alzadasaurus"	Welles	1943 1943 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevky's dinosaur genera list.-New taxa:-Non-mammalian:...
Anarosaurus Anarosaurus Anarosaurus is an extinct genus of early plesiosaur that lived in the Middle Triassic period ....	Dames	1890 1890 in paleontology -Dinosaurs:-Newly named plesiosaurs:-Pteridophyta:...	Valid.	mT Middle Triassic In the geologic timescale, the Middle Triassic is the second of three epochs of the Triassic period or the middle of three series in which the Triassic system is divided. It spans the time between 245 ± 1.5 Ma and 228 ± 2 Ma...
Apatomerus Apatomerus Apatomerus , is a genus of extinct reptile known from a single fossil from the Albian-age Kiowa Shale of Kansas, USA. This bone, collected in 1893, was first identified as the thighbone of a crocodilian, but was described in 1903 by Samuel Wendell Williston as belonging to a pterosaur...	Williston	1903 1903 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:-Non-mammalian:-References:...	Valid.	lK
Aphrosaurus Aphrosaurus Aphrosaurus is an extinct genus of plesiosaur from the Mesozoic. The type species is Aphrosaurus furlongi, named by Welles in 1943. Aphrosaurus furlongi was discovered in the Panoche Hills of Fresno County, California in 1939 by rancher Frank C...	Welles	1943 1943 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevky's dinosaur genera list.-New taxa:-Non-mammalian:...	Valid.	uK
"Apractocleidus"	Smellie	1916 1916 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	Disputed.			possible synonym of Cryptocleidus
Aptychodon Aptychodon Aptychodon is an extinct genus of plesiosaur from the Cretaceous of what is now the Czech Republic. The genus was named by Reuss in 1855.-References:...	Reuss	1855 1855 in paleontology -Newly named dinosaurs:-Newly named Prolacertiformes:-Newly named plesiosaurs:-Museums:* The Albany Museum of Grahamstown, South Africa is established....	Valid.	uK
Archaeonectrus Archaeonectrus Archaeonectrus is an extinct genus of pliosaur from the Jurassic of what is now southeastern England. The type species is Archaeonectrus rostratus, first named by Sir Richard Owen in 1865, and renamed by N.I. Novozhilov 99 years later.-References:* Sepkoski, J.J. . "A compendium of fossil marine...	Owen	1865 1865 in paleontology -New taxa:-Newly named plesiosaurs:...	Valid.	lJ
Aristonectes Aristonectes Aristonectes is an extinct genus of plesiosaur from the Late Cretaceous of what is now South America and Antarctica...	Cabrera	1941 1941 in paleontology -New taxa:-Newly named dinosaurs:Data coutersy of George Olshevky's dinosaur genera list.-New taxa:-Non-mammalian:-References:* Brown, B. 1941. The last dinosaurs. – Natural History 48: 290–295....	Valid.	uK	Chubut , Argentina
Attenborosaurus Attenborosaurus Attenborosaurus is an extinct genus of plesiosaur from the Early Jurassic of Dorset, England. The type species is A. conybeari.The genus is named after David Attenborough, the species after William Conybeare.-Sources:...	Bakker Robert T. Bakker Robert T. Bakker is an American paleontologist who helped reshape modern theories about dinosaurs, particularly by adding support to the theory that some dinosaurs were endothermic...	1993 1993 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:...	Valid.	lJ
Augustasaurus Augustasaurus Augustasaurus is a genus of aquatic sauropterygian reptile belonging to the Pistosauria, a clade containing plesiosaurs and their close relatives. Pistosaurus and Augustasaurus were thougth to be the only known members of the family Pistosauridae...	Sander Rieppel Bucher	1997 1997 in paleontology -newly named:-Newly named birds:-Dinosaurs:* Paleontologist Karen Chin receives a coprolite that was excavated during 1995 from strata dating back to the Maastrichtian in Saskatchewan, Canada. The specimen was about 17 inches long and contained fragments of bone...	Valid.	mT Middle Triassic In the geologic timescale, the Middle Triassic is the second of three epochs of the Triassic period or the middle of three series in which the Triassic system is divided. It spans the time between 245 ± 1.5 Ma and 228 ± 2 Ma...
Bathyspondylus Bathyspondylus Bathyspondylus is an extinct genus of plesiosaur. It was first described in 1982 from a specimen originally found in 1774, now housed at the Devizes Museum...	Delair	1982 1982 in paleontology -Pteridophyta:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:-New taxa:...	Valid.	uJ
Bishanopliosaurus Bishanopliosaurus Bishanopliosaurus is a genus of plesiosaur. The type species is B. youngi, based on remains found in the Ziliujing formation of China....	Dong	1980 1980 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:-Non-mammalian:-References:...	Valid.	lJ
Bobosaurus Bobosaurus Bobosaurus is an extinct genus of sauropterygian reptile related to plesiosaurs. It is based on the holotype MFSN 27285, a partial skeleton found in Early Carnian-age rocks of the Rio del Lago Formation, northeastern Italy. Bobosaurus was named in 2006 by Fabio M. Dalla Vecchia and the type...	Dalla Vecchia	2006 2006 in paleontology -Insects:-Tetrapodomorphs:-Newly named temnospondylians:-Newly named amphibians:-Ichthyosaurs:-Newly named basal lepidosauromorphs:-Newly named plesiosaurs:-Newly named squamates:-Newly named crurotarsans:-Newly named dinosaurs:...	Valid.	uT
Borealonectes Borealonectes Borealonectes is a genus of rhomaleosaurid pliosauroid, a type of plesiosaur. Its fossils were found in the Callovian-age Hiccles Cove Formation of Melville Island, Canada, one of the islands in the Canadian Arctic Archipelago. It is based on a skull, neck vertebrae, and the right forelimb of...	Sato Wu	1980 1980 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:-Non-mammalian:-References:...	Valid.	mJ Middle Jurassic The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from 176-161 million years ago. In European lithostratigraphy, rocks of this Middle Jurassic age are called the Dogger....
Brachauchenius Brachauchenius Brachauchenius is an extinct genus of pliosaur that lived in America during the Cretaceous.The type species, Brachauchenius lucasi, lived in the Western Inland Sea of North America around 93.5-89.3 million years ago, during the Turonian stage of the Cretaceous...	Williston	1903 1903 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:-Non-mammalian:-References:...	Valid.	lK to uK
Branacasaurus	Name	19##	Lapsus calami.			probable lapsus calami of Brancasaurus Brancasaurus Brancasaurus is an extinct genus of plesiosaur from the Early Cretaceous of what is now Germany. The type species is Brancasaurus brancai, first named by Wegner in 1914 in honor of German paleontologist Wilhelm von Branca...
Brancasaurus Brancasaurus Brancasaurus is an extinct genus of plesiosaur from the Early Cretaceous of what is now Germany. The type species is Brancasaurus brancai, first named by Wegner in 1914 in honor of German paleontologist Wilhelm von Branca...	Wegner	1914 1914 in paleontology -Dinosaurs:* Eugene Stebinger became the first to identify the Two Medicine Formation and to formally described its first fossil finds, which were excavated the previous year.-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr...	Valid.	lK
Brimosaurus Brimosaurus Brimosaurus is an extinct genus of plesiosaur from the Late Cretaceous of what is now Arkansas. The type species is Brancasaurus brancai, first named by Joseph Leidy in 1854...	Leidy	1855 1855 in paleontology -Newly named dinosaurs:-Newly named Prolacertiformes:-Newly named plesiosaurs:-Museums:* The Albany Museum of Grahamstown, South Africa is established....	Valid.	uK
Callawayasaurus Callawayasaurus Callawayasaurus is a genus of plesiosaur from the family Elasmosauridae. When the first Callawayasaurus fossil was first discovered by Samuel Paul Welles in 1962, he described it as Alzadasaurus colombiensis before it was moved into its current genus by Kenneth Carpenter in...	Carpenter	1999 1999 in paleontology -Insects:-Newly named taxa:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:-Non-mammalian:-References:...	Valid.	lK
Ceraunosaurus	Thurmond	1968 1968 in paleontology -New taxa:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:...	Jr. synonym			junior synonym of Trinacromerum Trinacromerum Trinacromerum is an extinct genus of sauropterygian reptile belonging to the plesiosaur suborder. It lived during the Late Cretaceous period in what is now Kansas. It was 3 meters long. Its teeth show it fed on small fish....
Charitosaurus Charitosaurus Charitosaurus is an extinct genus of plesiosaur....	Meyer	1838 1838 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	Valid.
Chinchenia Chinchenia Chinchenia is an extinct genus of pistosauroid....	Young	1965 1965 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	Valid.	mT Middle Triassic In the geologic timescale, the Middle Triassic is the second of three epochs of the Triassic period or the middle of three series in which the Triassic system is divided. It spans the time between 245 ± 1.5 Ma and 228 ± 2 Ma...
Cimoliasaurus Cimoliasaurus Cimoliasaurus was a plesiosaur that lived in the Early Cretaceous to the Late Cretaceous in New Jersey, New Zealand, England, and France. It grew from 13 to 25 ft long.- References :...	Leidy	1851 1851 in paleontology -Newly named dinosaurs:-Newly named plesiosaurs:...	Valid.	lK to uK
Colymbosaurus Colymbosaurus Colymbosaurus is a genus of English plesiosaur described in 1874 by Seeley. The only bones found include 74 vertebrae, ribs, coracoids, a scapula and fore and hind limbs . This specimen may be the missing body of Kimmerosaurus, which would make this a cryptoclid instead of an elasmosaurid...	Seeley	1874 1874 in paleontology -Newly named dinosaurs:-New taxa:-Newly named pterosaurs:-new taxa:...	Valid.	mJ Middle Jurassic The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from 176-161 million years ago. In European lithostratigraphy, rocks of this Middle Jurassic age are called the Dogger.... to uJ
Crymocetus Crymocetus Crymocetus is an extinct genus of plesiosaur....	Cope	1869 1869 in paleontology -Dinosaurs:-New taxa:-New taxa:...	Valid.	lK
Cryptocleidus	Seeley	1892 1892 in paleontology -Newly named dinosaurs:-New taxa:-Non-mammalian:...	Valid.
Cryptoclidus Cryptoclidus Cryptoclidus was a genus of plesiosaur from the Middle Jurassic period of England.-Discovery:Cryptoclidus is a plesiosaur whose specimens include adult and juvenile skeletons, and remains which have been found in various degrees of preservation in England, Northern France, Russia, and South America...	Phillips	1871 1871 in paleontology -Newly named dinosaurs:-New taxa:-New taxa:...	Valid.	mJ Middle Jurassic The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from 176-161 million years ago. In European lithostratigraphy, rocks of this Middle Jurassic age are called the Dogger....
Cymatosaurus Cymatosaurus Cymatosaurus is an extinct genus of pistosauroid sauropterygian. It is known from Early Triassic to the Middle Triassic period of Germany....	Fritsch	1894 1894 in paleontology -Newly named dinosaurs:-New taxa:-New taxa:-Non-mammalian:...	Valid.	mT Middle Triassic In the geologic timescale, the Middle Triassic is the second of three epochs of the Triassic period or the middle of three series in which the Triassic system is divided. It spans the time between 245 ± 1.5 Ma and 228 ± 2 Ma...
Dactylosaurus Dactylosaurus Dactylosaurus is a genus of nothosaur in the family Pachypleurosauridae. Along with Anarosaurus, Dactylosaurus was one of the earliest known pachypleurosaurs to come from Europe.-Etymology:...	Gurich	1884 1884 in paleontology -Dinosaurs:-New taxa:-Non-mammalian:...	Valid.
Deirosaurus Deirosaurus Deirosaurus is an extinct genus of plesiosaur....	Owen	1854 1854 in paleontology -Newly named dinosaurs:-Newly named plesiosaurs:-Non-mammalian:...	Valid.
Discosaurus Discosaurus Discosaurus is an extinct genus of plesiosaur....	Leidy	1851 1851 in paleontology -Newly named dinosaurs:-Newly named plesiosaurs:...	Valid.
Dolichorhynchops Dolichorhynchops Dolichorhynchops is an extinct genus of polycotylid plesiosaur from the Late Cretaceous of North America, containing three species, D. osborni, D. herschelensis and D. tropicensis. Dolichorhynchops was an oceangoing prehistoric reptile...	Williston	1903 1903 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:-Non-mammalian:-References:...	Valid.
Dravidosaurus Dravidosaurus Dravidosaurus 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...	Yadagiri Ayyasami	1979 1979 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:-References:...	Valid.
Edgarosaurus Edgarosaurus Edgarosaurus is a genus of polycotylid plesiosaur, containing one species, E. muddi. The type specimen was found in Early Cretaceous rocks in the state of Montana in the USA. At the time, this location was covered by part of the Western Interior Seaway.-References:Druckenmiller, PS, 2002...	Druckenmiller	2002 2002 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Pterosaurs:In October, a partial Mesadacylus wing was discovered in the Kingsview Quarry of Colorado...	Valid.
Elasmosaurus Elasmosaurus Elasmosaurus + σαυρος sauros 'lizard') is a genus of plesiosaur with an extremely long neck that lived in the Late Cretaceous period , 80.5 million years ago.-Description:...	Cope	1868 1868 in paleontology -Newly named dinosaurs:-New taxa:-Non-mammalian:...	Valid.
Eopolycotylus Eopolycotylus Eopolycotylus is an extinct genus of plesiosaur....	Albright Gillette Titus	2007 2007 in paleontology -newly named:-New taxa:-Newly named non-avian dinosaurs:Data courtesy of George Olshevky's dinosaur genera list.-Newly named birds:-New papers:...	Valid.
Eretmosaurus Eretmosaurus Eretmosaurus is an extinct genus of plesiosaur....	Seeley	1874 1874 in paleontology -Newly named dinosaurs:-New taxa:-Newly named pterosaurs:-new taxa:...	Valid.
Eridanosaurus Eridanosaurus Eridanosaurus is an extinct genus of plesiosaur....	Balsamo-Crivelli	1864 1864 in paleontology -Newly named plesiosaurs:...	Valid.
Eromangasaurus Eromangasaurus Eromangasaurus is an extinct genus of elasmosaurid known from northern Queensland of Australia.-Description:Eromangasaurus is known from the holotype QM F11050, a nearly complete but badly crushed skull and mandible...	Kear	2005 2005 in paleontology -New taxa:-New taxa:-Xiphosurans:* Fossils of Lunataspis, the earliest known xiphosuran, are discovered in Canada. It was not given a formal description until 2008, however.-New taxa:-Newly named dinosaurs:...	Valid.
Eurycleidus Eurycleidus Eurycleidus is an extinct genus of plesiosaur. The type species is E. arcuatus, which lived during the Hettangian age . Like other plesiosaurs, Eurycleidus probably lived on a diet of fish, using its sharp needle-like teeth to catch prey. Its shoulder bones were fairly large, indicating a powerful...	Andrews	1922 1922 in paleontology -Insects:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	Valid.
Eurysaurus Eurysaurus Eurysaurus is an extinct genus of plesiosaur from the Early Jurassic of France, named in 1878. The type material, consisting of a cranium, teeth and five vertebrae, is now lost....	Nopcsa	1928 1928 in paleontology -Dinosaurs:* Charles Gilmore returned to prospect for fossils in the Two Medicine Formation. He would return yet again in 1935.-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr...	Valid.
Fresnosaurus Fresnosaurus Fresnosaurus is an extinct genus of plesiosaur from the Late Cretaceous of what is now California. The type species is Fresnosaurus drescheri, first described by Welles in 1943. The generic name Fresnosaurus honors Fresno County, while the specific name honors Arthur Drescher.Fresnosaurus was...	Welles	1943 1943 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevky's dinosaur genera list.-New taxa:-Non-mammalian:...	Valid.
Futabasaurus Futabasaurus Futabasaurus 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...	Sato Hasegawa Manabe	2006 2006 in paleontology -Insects:-Tetrapodomorphs:-Newly named temnospondylians:-Newly named amphibians:-Ichthyosaurs:-Newly named basal lepidosauromorphs:-Newly named plesiosaurs:-Newly named squamates:-Newly named crurotarsans:-Newly named dinosaurs:...	Valid.			also a theropod nomen nudum ("Futabasaurus Futabasaurus (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... ")
Gallardosaurus Gallardosaurus Gallardosaurus is a genus of pliosaurid plesiosaur from the Caribbean seaway. It contains the single species Gallardosaurus iturraldei. Gallardosaurus was found in middle-late Oxfordian-age rocks of the Jagua Formation of western Cuba...	Gasparini	2009 2009 in paleontology -Anomalocaridids:-Arachnids:-Insects:-Cephalopods:Three new species of extinct Octopoda discovered in 2009. The species - Keuppia hyperbolaris, Keuppia levante, and Styletoctopus annae - lived about 95 million years ago, and bear a strong resemblance to modern octopuses, suggesting that the...	Valid.
Georgia	Otschev	1976 1976 in paleontology -Dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Newly named dinosaurs:-New taxa:-Non-mammalian:...	Preoccupied.			preoccupied by a genus of mollusk
Georgiasaurus Georgiasaurus Georgiasaurus is an extinct genus of plesiosaur from the Late Cretaceous of Russia. Otschev originally named the specimen Georgia, but that name was preoccupied...	Otschev	1878 1878 in paleontology -Dinosaurs:O. W. Lucas recovers more material which would be referred to Laelaps trihedrodon from Morrison Formation strata near Garden Park, Colorado.-Newly named plesiosaurs:-Non-mammalian:...	Valid.
Goniosaurus Goniosaurus Goniosaurus is an extinct genus of plesiosaur....	Meyer	1860 1860 in paleontology -New taxa:-New taxa:-Non-mammalian:...	Valid.
Hauffiosaurus Hauffiosaurus Hauffiosaurus is an extinct genus of Early Jurassic pliosaurid plesiosaur known from Holzmaden of Germany and from Yorkshire of the United Kingdom. It was first named by Frank Robin O’Keefe in 2001 and the type species is Hauffiosaurus zanoni. In 2011, two additional species were assigned to this...	O'Keefe	2001 2001 in paleontology -Newly named insects:-Newly named bony fishes:-Newly named amphibians:-Newly named turtles:-Ichthyosaurs:-Newly named basal lepidosauromorphs:-Newly named plesiosaurs:-Newly named sphenodonts:-Newly named basal archosauromorphs:...	Valid.
Hexatarsostinus Hexatarsostinus Hexatarsostinus is an extinct genus of plesiosaur....	Hawkins	1840 1840 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Newly named plesiosaurs:...	Valid.
Hydralmosaurus Hydralmosaurus Hydralmosaurus is a genus of elasmosaurid plesiosaur. It is known from fossils discovered in Late Cretaceous rocks of Nebraska and Wyoming. Hydralmosaurus was coined as a replacement name for "Elasmosaurus" serpentinus in 1943 by Samuel Paul Welles....	Welles	1943 1943 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevky's dinosaur genera list.-New taxa:-Non-mammalian:...	Valid.
Hydrorion Hydrorion Hydrorion is an extinct genus of plesiosaur. It was found in Jurassic formations in Germany. The only species is Hydrorion brachypterygius....	Grobmann	2006 2006 in paleontology -Insects:-Tetrapodomorphs:-Newly named temnospondylians:-Newly named amphibians:-Ichthyosaurs:-Newly named basal lepidosauromorphs:-Newly named plesiosaurs:-Newly named squamates:-Newly named crurotarsans:-Newly named dinosaurs:...	Valid.
Hydrotherosaurus Hydrotherosaurus Hydrotherosaurus is an extinct genus of elasmosaurid plesiosaur from the Upper Cretaceous of Fresno County, California, measuring up to 13 m in length. The species H. alexandrae was named for its discoverer, Annie Montague Alexander by Samuel Paul Welles.-References:* Welles, S. P. 1943...	Welles	1943 1943 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevky's dinosaur genera list.-New taxa:-Non-mammalian:...	Valid.
Ischyrodon	von Meyer	1838 1838 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	Jr. synonym			junior synonym of Liopleurodon Liopleurodon Liopleurodon is a genus of large, carnivorous marine reptile belonging to the Pliosauroidea, a clade of short-necked plesiosaurs. Two species of Liopleurodon lived during the Callovian stage of the Middle Jurassic Period , while the third, L. rossicus, lived during the Late Jurassic...
Kaiwhekea Kaiwhekea Kaiwhekea is an extinct genus of plesiosaur from the Late Cretaceous of what is now New Zealand. The type species, Kaiwhekea katiki, was first described by Arthur Cruickshank and Ewan Fordyce in 2002. Kaiwhekea was approximately 7 meters long and lived around 69-70 million years ago...	Cruickshank Fordyce	2002 2002 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Pterosaurs:In October, a partial Mesadacylus wing was discovered in the Kingsview Quarry of Colorado...	Valid.
Kimmerosaurus Kimmerosaurus Kimmerosaurus is an extinct genus of plesiosaur from the family Cryptoclididae, closely related to Tatenectes.-Etymology:...	Brown	1981 1981 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Plesiosaurs:* Carroll, R. C., 1981, Plesiosaur ancestors from the Upper Permian of Madagascar: Philosophical Transactions of the Royal Society, London B, v. 293,...	Valid.
Kronosaurus Kronosaurus Kronosaurus is an extinct genus of short-necked pliosaur. It was among the largest pliosaurs, and is named after the leader of the Greek Titans, Cronus.-Discovery and species:Kronosaurus lived in the Early Cretaceous Period ....	Longman	1924 1924 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	Valid.
Leptocleidus Leptocleidus Leptocleidus is an extinct genus of pliosaurid plesiosaur, belonging to the family Leptocleididae. It is the only known pliosaur to be found in sediments on the Isle of Wight.-Etymology:In short, the term Leptocleidus means "slender clavicle"...	Andrews	1922 1922 in paleontology -Insects:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	Valid.
Leurospondylus Leurospondylus Leurospondylus is a genus of plesiosaur whose family is not known for certain, but is thought to be Plesiosauridae.-Etymology:The name Leurospondylus comes from a fusion of two Greek words, leuros meaning "even", "flat" or "smooth", and spondylos meaning "vertebra." The name of the type species L...	Brown	1913 1913 in paleontology -Dinosaurs:* A US Geological Survey crew headed by Eugene Stebinger and a US National Museum crew headed by Charles Gilmore worked together to excavate the first dinosaur discovery of the Two Medicine Formation.-Newly named dinosaurs:...	Valid.
Libonectes Libonectes Libonectes is an extinct genus of sauropterygian reptile belonging to the plesiosaur order. It is known from a single fossil specimen found in the Britton Formation of Texas, dated to the lower Turonian stage of the late Cretaceous period.The animal was very similar to the related Thalassomedon,...	Carpenter	1997 1997 in paleontology -newly named:-Newly named birds:-Dinosaurs:* Paleontologist Karen Chin receives a coprolite that was excavated during 1995 from strata dating back to the Maastrichtian in Saskatchewan, Canada. The specimen was about 17 inches long and contained fragments of bone...	Valid.
Liopleurodon Liopleurodon Liopleurodon is a genus of large, carnivorous marine reptile belonging to the Pliosauroidea, a clade of short-necked plesiosaurs. Two species of Liopleurodon lived during the Callovian stage of the Middle Jurassic Period , while the third, L. rossicus, lived during the Late Jurassic...	Sauvage	1873 1873 in paleontology -New taxa:...	Valid.
Luetkesaurus Luetkesaurus Luetkesaurus is an extinct genus of plesiosaur from the Late Cretaceous of what is now the Kursk area of western Russia. Luetkesaurus was first named by V. Kiprijanoff in 1883, in honor of paleontologist and zoologist Christian Frederich Luetken; no type species has ever been designated...	Kiprijanoff	1883 1883 in paleontology -Dinosaurs:-New taxa:...	Valid.
Lusonectes Lusonectes Lusonectes is an extinct genus of plesiosaurid from Lower Jurassic deposits of Alhadas, Portugal. It is known from the holotype MG33, a partial skull and articulated mandible. It was found by Henri Émile Sauvage, a french paleontologist, in the 19th century from the São Gião Formation, near...	Smith Araújo Mateus	2011 2011 in paleontology -Lobopods:-Arachnids:-Insects:-Newly named jawless vertebrates:-Newly named acanthodian:-Newly named cartilaginous fishes:-Newly named bony fishes:-Newly named lepospondyls:-Newly named temnospondyls:-Newly named lissamphibians:...	Valid.	lJ	Europe Europe Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...
Macroplata Macroplata Macroplata , meaning, , is an extinct genus of Early Jurassic basal plesiosaur which grew up to in length. Like other plesiosaurs, Macroplata probably lived on a diet of fish, using its sharp needle-like teeth to catch prey. Its shoulder bones were fairly large, indicating a powerful forward...	Swinton	1930 1930 in paleontology -Newly named dinosaurs:-New taxa:-Non-mammalian:...	Valid.
Manemergus Manemergus Manemergus is a genus of polycotylid plesiosaur from the Late Cretaceous of Morocco. Manemergus was described in 2005 and contains only one species, M. anguirostris...	Buchy Metayer Frey	2005 2005 in paleontology -New taxa:-New taxa:-Xiphosurans:* Fossils of Lunataspis, the earliest known xiphosuran, are discovered in Canada. It was not given a formal description until 2008, however.-New taxa:-Newly named dinosaurs:...	Valid.
Maresaurus Maresaurus Maresaurus is an extinct genus of pliosaur from the Middle Jurassic of what is now Argentina. The type species, Maresaurus coccai, was named by Gasparini in 1997. Recent phylogenetic analysis found Maresaurus to be a rhomaleosaurid ....	Gasparini	1997 1997 in paleontology -newly named:-Newly named birds:-Dinosaurs:* Paleontologist Karen Chin receives a coprolite that was excavated during 1995 from strata dating back to the Maastrichtian in Saskatchewan, Canada. The specimen was about 17 inches long and contained fragments of bone...	Valid.
Marmornectes Marmornectes Marmornectes is an extinct genus of pliosaurid known from the Bedfordshire of United Kingdom.-Description:Marmornectes is known from the holotype BEDFM 1999.201, articulated partial skeleton which preserved the skull...	Ketchum Benson	2011 2011 in paleontology -Lobopods:-Arachnids:-Insects:-Newly named jawless vertebrates:-Newly named acanthodian:-Newly named cartilaginous fishes:-Newly named bony fishes:-Newly named lepospondyls:-Newly named temnospondyls:-Newly named lissamphibians:...	Valid.	mJ Middle Jurassic The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from 176-161 million years ago. In European lithostratigraphy, rocks of this Middle Jurassic age are called the Dogger....	Europe Europe Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...
Mauisaurus Mauisaurus Mauisaurus is a genus of plesiosaur that lived during the Late Cretaceous period around 80 to 69 million years ago in what is now New Zealand. It was the largest plesiosaur, and perhaps the largest marine reptile in New Zealand waters at the time. Mauisaurus haasti is the only known species of the...	Hector	1874 1874 in paleontology -Newly named dinosaurs:-New taxa:-Newly named pterosaurs:-new taxa:...	Valid.
Megalneusaurus Megalneusaurus Megalneusaurus is an extinct genus of large pliosaur that lived in the Sundance Sea during the Kimmeridgian, ~156-152 million years ago, in the Late Jurassic....	Knight	1898 1898 in paleontology -Dinosaurs:-New taxa:-Non-mammalian:...	Valid.
"Megalosaurus Megalosaurus Megalosaurus is a genus of large meat-eating theropod dinosaurs of the Middle Jurassic period of Europe... "	Name	19##	Valid.			also a valid 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... genus
Meyerasaurus Meyerasaurus Meyerasaurus is an extinct genus of rhomaleosaurid known from Holzmaden, Baden-Württemberg of southeastern Germany.-Description:Meyerasaurus is known from the holotype SMNS 12478, articulated and complete skeleton which preserved the skull, exposed in ventral view. The skull has a length of ,...	Smith Vincent	2010 2010 in paleontology -Anomalocaridids:-Newly named crustaceans:-Newly named insects:* A new family, Cascopleciidae, is published by Poinar Jr.* A new family of ceraphronoid Hymenopters, Radiophronidae, is published by Ortega-Blanco, Rasnitsyn, and Delclòs....	Valid.	lJ	Europe Europe Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...
Microcleidus Microcleidus Microcleidus is an extinct genus of sauropterygian reptile belonging to the plesiosaur suborder. It was about the size of a whale.Species include: Microcleidus homalospondylus and Microcleidus macropterus . The species has 40 neck vertebrae and a short tail of 28 vertebrae.-External links:*...	Watson	1911	Valid.
Morenosaurus Morenosaurus Morenosaurus is an extinct genus of plesiosaur from the Cretaceous of what is now California. The type species is Morenosaurus stocki, first named by Samuel Welles in 1943, in honor of Dr. Chester Stock. The species was found by Robert Wallace and Arthur Drescher in the Panoche Hills region of...	Welles	1943 1943 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevky's dinosaur genera list.-New taxa:-Non-mammalian:...	Valid.
Morturneria	Chatterjee Creisler	1994 1994 in paleontology -Dinosaurs:* Aff. Rebbachisaurus gastroliths documented.* The "Talkeetna Mountains Hadrosaur" specimen was discovered in a quarry being excavated for road material. The quarry is near the Glenn Highway, approximately 150 miles northeast of Anchorage...	Valid.	Uk	Seymour Island, Antarctica	Possible junior synonym of Aristonectes
Muraenosaurus Muraenosaurus Muraenosaurus is an extinct genus of sauropterygian reptile, from the Middle Jurassic of Europe. Fossils have been found in England and France....	Seeley	1874 1874 in paleontology -Newly named dinosaurs:-New taxa:-Newly named pterosaurs:-new taxa:...	Valid.
Nichollssaura	Druckenmiller Russell	2009 2009 in paleontology -Anomalocaridids:-Arachnids:-Insects:-Cephalopods:Three new species of extinct Octopoda discovered in 2009. The species - Keuppia hyperbolaris, Keuppia levante, and Styletoctopus annae - lived about 95 million years ago, and bear a strong resemblance to modern octopuses, suggesting that the...	Valid.
Nichollsia Nichollsia (plesiosaur) Nichollssaura is an extinct genus of leptocleidid plesiosaur from the Early Cretaceous Boreal Sea of North America. The type species is N. borealis, found in early Albian deposits of Alberta, Canada. Nichollssaura fills an approximate 40-million-year gap in the fossil record of North American...	Druckenmiller Russell	2008 2008 in paleontology -Angiosperms:-Monocots:-New taxa:-Insects:-Xiphosurans:-Placoderms:-Amphibians:Jenkins, F. A., jr, Shubin, N. H., Gatesy, S. M., and Warren, A., 2008, Gerrothorax pulcherrimus from the Upper Triassic Fleming Fjord Formation of East Greenland and a reassessment of head lifting in temnospondyl...	Preocc.			also a genus of isopod Nichollsia (crustacean) Nichollsia is a genus of crustaceans from India. It comprises two species:Nichollsia kashiensis Chopra & Tiwari, 1950Nichollsia menoni Tiwari, 1958...
Occitanosaurus Occitanosaurus Occitanosaurus is an extinct genus of plesiosaur from the Early Jurassic of what is now France. The type species is Occitanosaurus tournemirensis , first named by Sciau et al. in 1990...	Bardet Fernandez Garcia-Ramos Superbiola Pinuela Ruiz-Omenaca Vincent	2008 2008 in paleontology -Angiosperms:-Monocots:-New taxa:-Insects:-Xiphosurans:-Placoderms:-Amphibians:Jenkins, F. A., jr, Shubin, N. H., Gatesy, S. M., and Warren, A., 2008, Gerrothorax pulcherrimus from the Upper Triassic Fleming Fjord Formation of East Greenland and a reassessment of head lifting in temnospondyl...	Valid.
Ogmodirus Ogmodirus Ogmodirus is an extinct genus of plesiosaur with an extremely long neck that lived in the Cretaceous. It may be member of the Elasmosauridae, a group of marine animals related to Elasmosaurus, but the condition of the fossils discovered to date means the genus is dubious. The type species,...	Williston Moodie	1917 1917 in paleontology -Insects:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	Valid.
Orophosaurus Orophosaurus Orophosaurus is an extinct genus of plesiosaur....	Cope	1851 1851 in paleontology -Newly named dinosaurs:-Newly named plesiosaurs:...	Valid.
Opallionectes Opallionectes Opallionectes andamookaensis is the name given to a 5 m long plesiosaur, which is thought to have lived during the early Cretaceous period , 115 million years ago, in shallow seas covering what is now Australia.An opalized partial skeleton Opallionectes andamookaensis (meaning "the opal...	Kear	2006 2006 in paleontology -Insects:-Tetrapodomorphs:-Newly named temnospondylians:-Newly named amphibians:-Ichthyosaurs:-Newly named basal lepidosauromorphs:-Newly named plesiosaurs:-Newly named squamates:-Newly named crurotarsans:-Newly named dinosaurs:...	Valid.
Pachycostasaurus Pachycostasaurus Pachycostasaurus is an extinct genus of plesiosaur....	Cruickshank Martill	1996 1996 in paleontology -Newly named crustaceans:-Dinosaurs:* In the summer excavation resumed on the Talkeetna Mountains Hadrosaur, discovered in a quarry near the Glenn Highway, approximately 150 miles northeast of Anchorage.-Newly named dinosaurs:...	Valid.
Pahasapasaurus Pahasapasaurus Pahasapasaurus is a genus of plesiosaur. It was an early polycotylid plesiosaur from the Cenomanian of South Dakota, USA. Distinctive features of the taxon include elongate epipodial bones and the nature of the palate bones . The type species is P. haasi....	Schumacher	2007 2007 in paleontology -newly named:-New taxa:-Newly named non-avian dinosaurs:Data courtesy of George Olshevky's dinosaur genera list.-Newly named birds:-New papers:...	Valid.
Palmula	Albright Gillette Titus	2007 2007 in paleontology -newly named:-New taxa:-Newly named non-avian dinosaurs:Data courtesy of George Olshevky's dinosaur genera list.-Newly named birds:-New papers:...	Valid.			preoccupied by a genus of foraminifer, renamed Palmulasaurus Palmulasaurus Palmulasaurus is a genus of polycotylid plesiosaur from the Late Cretaceous of Utah. It was originally described as Palmula, but the name was occupied by a genus of Cretaceous foraminifer first described in 1833....
Palmulasaurus Palmulasaurus Palmulasaurus is a genus of polycotylid plesiosaur from the Late Cretaceous of Utah. It was originally described as Palmula, but the name was occupied by a genus of Cretaceous foraminifer first described in 1833....	Albright Gillete Titus	2007 2007 in paleontology -newly named:-New taxa:-Newly named non-avian dinosaurs:Data courtesy of George Olshevky's dinosaur genera list.-Newly named birds:-New papers:...	Valid.
Pantosaurus Pantosaurus Pantosaurus is an extinct genus of plesiosaur from the Late Jurassic of what is now Wyoming. It lived in what used to be the Sundance Sea. It was originally named Parasaurus by Othniel Charles Marsh in reference to Plesiosaurus, but that name was preoccupied, and Marsh changed it...	Marsh	1893 1893 in paleontology -Newly named dinosaurs:-New taxa:-Non-mammalian:...	Valid.
Peloneustes Peloneustes Peloneustes is an extinct genus of sauropterygian reptile belonging to the family Pliosauridae. It is known from the Callovian aged deposits of the Oxford clay formation of England...	Lydekker	1889 1889 in paleontology -Dinosaurs:-New taxa:...	Valid.
Pentatarsostinius	Hawkins	1840 1840 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Newly named plesiosaurs:...	Syn.			Synonym of Plesiosaurus
Peyerus	Stromer	1935 1935 in paleontology -Dinosaurs:* Charles Gilmore returned to prospect for fossils in the Two Medicine Formation.-New taxa:-Non-mammalian:-References:* Trexler, D., 2001, Two Medicine Formation, Montana: geology and fauna: In: Mesozoic Vertebrate Life, edited by Tanke, D. H., and Carpenter, K., Indiana University...	Jr. synonym			junior synonym of Leptocleidus Leptocleidus Leptocleidus is an extinct genus of pliosaurid plesiosaur, belonging to the family Leptocleididae. It is the only known pliosaur to be found in sediments on the Isle of Wight.-Etymology:In short, the term Leptocleidus means "slender clavicle"...
Picrocleidus	Andrews	1909 1909 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:-People:...	Jr. synonym			junior synonym of Muraenosaurus Muraenosaurus Muraenosaurus is an extinct genus of sauropterygian reptile, from the Middle Jurassic of Europe. Fossils have been found in England and France....
Piptomerus Piptomerus Piptomerus is an extinct genus of plesiosaur....	Cope	1887 1887 in paleontology -Classification Events:* Harry Govier Seeley divides the Dinosaurs into two taxa based on the configuration of their hip bones. -Newly named dinosaurs:-New taxa:-New taxa:-Paleontologists:...	Valid.
Piratosaurus Piratosaurus Piratosaurus is an aquatic genus of plesiosaur with one eye. Plesiosaurs are real dinosaurs, despite what you may hear from "experts". Piratosaurus had a triangular hat-like cranial bone structure, and "cannon arms" akin to the pistol shrimp which could kill large mosasaurs with a single blast...	Leidy	1865 1865 in paleontology -New taxa:-Newly named plesiosaurs:...	Valid.
Plesioliopleurodon Plesioliopleurodon Plesiopleurodon is an extinct genus of plesiosauroid from the Late Cretaceous of North America. It was named by Carpenter based upon a complete skull and lower jaws, neck vertebrae, and a right coracoid. It was collected from the Belle Fourche Shale , in the Rattlesnake Hills of Wyoming...	Name	19##	Valid.			apparent typographical error for Plesiopleurodon
Plesiopleurodon	Carpenter	1996 1996 in paleontology -Newly named crustaceans:-Dinosaurs:* In the summer excavation resumed on the Talkeetna Mountains Hadrosaur, discovered in a quarry near the Glenn Highway, approximately 150 miles northeast of Anchorage.-Newly named dinosaurs:...	Valid.
Plesiopterys	O'Keefe	2004 2004 in paleontology -New taxa:-newly named:-newly named:-New taxa:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:-Non-mammalian:...	Valid.
Plesiosaurus Plesiosaurus Plesiosaurus was a genus of large marine sauropterygian reptile that lived during the early part of the Jurassic Period, and is known by nearly complete skeletons from the Lias of England...	Conybeare	1824 1824 in paleontology -Dinosaurs:* William Buckland realizes that fossils he previously believed to be of cetacean origin were actually Iguanodon fossils. This mistake cost him the chance to describe the genus himself.-Newly named dinosaurs:...	Valid.
Pliosaurus Pliosaurus Pliosaurus is a genus of extinct marine reptile. It is included in the family Pliosauridae. Its diet would have included fish, squid and other marine reptiles. This genus has contained several species in the past but it currently consists of the type species P. brachydeirus, P. macromerus and P...	Owen	1841 1841 in paleontology -Dinosaurs:* On June 30, Sir Richard Owen presents his findings regarding some enormous bones that the Reverend William Buckland had acquired at an earlier date. He names the new genus to which these bones belong "Cetiosaurus." This event marks the first scientific description of a sauropod.* Owen...	Valid.
Polycotylus Polycotylus Polycotylus is a genus of plesiosaur within the family Polycotylidae. The type species is P. latippinis and was named by American paleontologist Edward Drinker Cope in 1869. Eleven other species have been identified. The name means 'much-cupped vertebrae', referring to the shape of the vertebrae...	Cope	1869 1869 in paleontology -Dinosaurs:-New taxa:-New taxa:...	Valid.
Polyptychodon Polyptychodon Polyptychodon is an extinct genus of sauropterygian reptile belonging to the family Pliosauridae that lived during the Cretaceous. Its fossils have been found in Europe and North America....	Owen	1841 1841 in paleontology -Dinosaurs:* On June 30, Sir Richard Owen presents his findings regarding some enormous bones that the Reverend William Buckland had acquired at an earlier date. He names the new genus to which these bones belong "Cetiosaurus." This event marks the first scientific description of a sauropod.* Owen...	Valid.
Procotylus Procotylus Procotylus is an extinct genus of plesiosaur....	Korotneff	1908 1908 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	Valid.
Rhomaleosaurus Rhomaleosaurus Rhomaleosaurus is an extinct genus of Early Jurassic rhomaleosaurid pliosauroid known from Northamptonshire and from Yorkshire of the United Kingdom. It was first named by Harry Seeley in 1874 and the type species is Rhomaleosaurus cramptoni...	Seeley	1871 1871 in paleontology -Newly named dinosaurs:-New taxa:-New taxa:...	Valid.
Scanisaurus Scanisaurus Scanisaurus meaning "Scania lizard", is a genus of plesiosaur. Person 1996 has classified Scanisaurus in the Cimoliasauridae, as a mesodiran plesiosaur, with a larger head and relatively shorter neck than in dolichodiran plesiosaurs. Scanisaurus lived during the Late Cretaceous of Sweden. It is...	Persson	1959 1959 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:...	Valid.
"Seeleysaurus"	White	1940 1940 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevky's dinosaur genera list.-New taxa:-Non-mammalian:...	Valid.
Seeleyosaurus Seeleyosaurus Seeleyosaurus is an extinct genus of plesiosaur. It is known from a large almost complete skeleton from the Upper Lias of Württemberg. There seems to be the impression of a rhomboidal flap of skin in a vertical plane; if so, many plesiosaurs may have been equipped in this way....	White	1940 1940 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevky's dinosaur genera list.-New taxa:-Non-mammalian:...	Valid.
Simolestes Simolestes Simolestes is an extinct genus of pliosaurs that lived in the Middle to Late Jurassic. Three species are currently known:*Simolestes keileni from the Bajocian of France...	Andrews	1909 1909 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:-People:...	Valid.
Sinopliosaurus Sinopliosaurus Sinopliosaurus 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....	Young	1944 1944 in paleontology -Dinosaurs:* The only known fossils of Poekilopleuron are destroyed during the Allied liberation of Normandy.-Newly named dinosaurs:Data coutersy of George Olshevky's dinosaur genera list.-New taxa:...	Valid.	lK Early Cretaceous The Early Cretaceous or the Lower Cretaceous , is the earlier or lower of the two major divisions of the Cretaceous...
Spondylosaurus	Fisher	1845 1845 in paleontology -New taxa:-Non-mammalian:...	Jr. synonym			junior synonym of Pliosaurus Pliosaurus Pliosaurus is a genus of extinct marine reptile. It is included in the family Pliosauridae. Its diet would have included fish, squid and other marine reptiles. This genus has contained several species in the past but it currently consists of the type species P. brachydeirus, P. macromerus and P...
Sulcusuchus Sulcusuchus Sulcusuchus is a genus of polycotylid plesiosaur from the Late Cretaceous of Argentina....	Gasparini Spalletti	1992 1992 in paleontology - Dinosaurs :* During the 1992 field season a concerted effort was undertaken by the Royal Tyrell Museum to recover the remains of young hadrosaurs. The researchers describe the acquisition that season of 43 specimens as being a success...	Valid.	uK	Rio Negro and Chubut Province, Argentina
Stereosaurus Stereosaurus "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...	Seeley	1869 1869 in paleontology -Dinosaurs:-New taxa:-New taxa:...	Valid.
Sthenarosaurus Sthenarosaurus Sthenarosaurus is an extinct genus of plesiosaur....	Watson	1911	Valid.	lJ
"Stretosaurus"	Tarlo	1959 1959 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:...	Jr. synonym			possible junior synonym of Liopleurodon Liopleurodon Liopleurodon is a genus of large, carnivorous marine reptile belonging to the Pliosauroidea, a clade of short-necked plesiosaurs. Two species of Liopleurodon lived during the Callovian stage of the Middle Jurassic Period , while the third, L. rossicus, lived during the Late Jurassic...
Strongylokrotaphus	Novozhilov	1964 1964 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:-Non-mammalian:...	Jr. synonym			junior synonym of Pliosaurus Pliosaurus Pliosaurus is a genus of extinct marine reptile. It is included in the family Pliosauridae. Its diet would have included fish, squid and other marine reptiles. This genus has contained several species in the past but it currently consists of the type species P. brachydeirus, P. macromerus and P...
Styxosaurus Styxosaurus Styxosaurus is a genus of plesiosaur of the family Elasmosauridae. Styxosaurus lived during the Santonian and Campanian age of the Cretaceous period.-Etymology:...	Welles	1952 1952 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	Valid.	uK
Taphrosaurus Taphrosaurus Taphrosaurus is an extinct genus of plesiosaur....	Cope	1870 1870 in paleontology -Dinosaurs:-New taxa:-New taxa:-Non-mammalian:...	Valid.	uK
Tapinosaurus Tapinosaurus Tapinosaurus is an extinct genus of plesiosaur....	Rabeck	1925 1925 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	Valid.
"Tatenectes Tatenectes Tatenectes is an extinct genus of cryptoclidid plesiosaur known from the Upper Member of the Sundance Formation of Wyoming. It was named by O'Keefe and Wahl in 2003 and the type species is Tatenectes laramiensis.... "	Knight	1900 1900 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:...	Valid.
Terminonatator Terminonatator Terminonatator is a genus of elasmosaurid plesiosaur from the Late Cretaceous of Saskatchewan, Canada. It is known from a skull and partial skeleton from a young adult, found in the Campanian-age Bearpaw Formation near Notukeu Creek in Ponteix...	Sato	2003 2003 in paleontology -New taxa:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:-Non-mammalian:-newly named:-Conifers:-Angiosperms:...	Valid.	uK
Thalassiodracon Thalassiodracon Thalassiodracon is an extinct genus of small pliosaur that lived in the Late Triassic to the Early Jurassic of Europe. The animal is known from a number of complete skeletons found by the fossil collector Thomas Hawkins in Somerset, England...	Storrs Taylor	1996 1996 in paleontology -Newly named crustaceans:-Dinosaurs:* In the summer excavation resumed on the Talkeetna Mountains Hadrosaur, discovered in a quarry near the Glenn Highway, approximately 150 miles northeast of Anchorage.-Newly named dinosaurs:...	Valid.	uT Late Triassic The Late Triassic is in the geologic timescale the third and final of three epochs of the Triassic period. The corresponding series is known as the Upper Triassic. In the past it was sometimes called the Keuper, after a German lithostratigraphic group that has a roughly corresponding age... -lJ Early Jurassic The Early Jurassic epoch is the earliest of three epochs of the Jurassic period...
Thalassiosaurus	Welles	1953 1953 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	Valid.			junior synonym of Styxosaurus Styxosaurus Styxosaurus is a genus of plesiosaur of the family Elasmosauridae. Styxosaurus lived during the Santonian and Campanian age of the Cretaceous period.-Etymology:...
Thalassomedon Thalassomedon Thalassomedon is a genus of plesiosaur, named by Welles in 1943. Greek, thalassa, "sea" and Greek, medon, "lord, ruler": Sea lord.-Introduction:...	Welles	1943 1943 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevky's dinosaur genera list.-New taxa:-Non-mammalian:...	Valid.	uK
Thalassonomosaurus	Welles	1943 1943 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevky's dinosaur genera list.-New taxa:-Non-mammalian:...	Jr. synonym			junior synonym of Styxosaurus Styxosaurus Styxosaurus is a genus of plesiosaur of the family Elasmosauridae. Styxosaurus lived during the Santonian and Campanian age of the Cretaceous period.-Etymology:...
"Thaumatosaurus"	Meyer	1841 1841 in paleontology -Dinosaurs:* On June 30, Sir Richard Owen presents his findings regarding some enormous bones that the Reverend William Buckland had acquired at an earlier date. He names the new genus to which these bones belong "Cetiosaurus." This event marks the first scientific description of a sauropod.* Owen...	Valid.
Thililua Thililua Thililua is a genus of polycotylid plesiosaur, containing one species, T. longicollis. The name Thililua is derived from that of an ancient aquatic god from local Berber mythology; longicollis refers to the animal's long neck. Thililua has been found in Late Cretaceous rocks in the High Atlas...	Bardet Suberbiola Jalil	2003 2003 in paleontology -New taxa:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:-Non-mammalian:-newly named:-Conifers:-Angiosperms:...	Valid.	uK
"Tremamesacleis"	White	1940 1940 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevky's dinosaur genera list.-New taxa:-Non-mammalian:...	Valid.	uJ		possible junior synonym of Muraenosaurus Muraenosaurus Muraenosaurus is an extinct genus of sauropterygian reptile, from the Middle Jurassic of Europe. Fossils have been found in England and France....
Tricleidus Tricleidus Tricleidus is an extinct genus of cryptoclidid plesiosaur known from only specimen from the middle Jurassic of United Kingdom. It was first named by Andrews in 1909 and the type species is Tricleidus seeleyi....	Andrews	1909 1909 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:-People:...	Valid.
Trinacromerum Trinacromerum Trinacromerum is an extinct genus of sauropterygian reptile belonging to the plesiosaur suborder. It lived during the Late Cretaceous period in what is now Kansas. It was 3 meters long. Its teeth show it fed on small fish....	Cragin	1888 1888 in paleontology -Dinosaurs:-Newly named plesiosaurs:-New taxa:-Non-mammalian:...	Valid.	uK
Tuarangisaurus Tuarangisaurus Tuarangisaurus is an extinct genus of elasmosaurid known from New Zealand. Tuarangisaurus is known from the holotype NZGS CD425, a nearly complete skull and mandible and from NZGS CD426, nine anterior-most cervical vertebrae...	Wiffen Moisley	1986 1986 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Pterosaurs:...	Valid.	uK
Turneria Turneria Turneria is a genus of ants that belongs to the ant subfamily Dolichoderinae. They form small colonies of fewer than 500 workers, and nest in trees and twigs....	Chatterjee Small	1989 1989 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:-Non-mammalian:-References:...	Valid.			preoccupied by a genus of ant Ant Ants are social insects of the family Formicidae and, along with the related wasps and bees, belong to the order Hymenoptera. Ants evolved from wasp-like ancestors in the mid-Cretaceous period between 110 and 130 million years ago and diversified after the rise of flowering plants. More than...
Umoonasaurus Umoonasaurus Umoonasaurus is an extinct genus of plesiosaur belonging to the family Leptocleididae. This genus lived approximately 115 million years ago in shallow seas covering parts of what is now Australia. It was a relatively small animal around 2.5 m long...	Kear Schroeder Lee	2006 2006 in paleontology -Insects:-Tetrapodomorphs:-Newly named temnospondylians:-Newly named amphibians:-Ichthyosaurs:-Newly named basal lepidosauromorphs:-Newly named plesiosaurs:-Newly named squamates:-Newly named crurotarsans:-Newly named dinosaurs:...	Valid.	lK
Uronautes Uronautes Uronautes is a dubious genus of extinct plesiosaur from the family Rhomaleosauridae. Uronautes is known from several fossilized vertebra, portions of a few limbs, and ribs.-Etymology:...	Cope	1870 1870 in paleontology -Dinosaurs:-New taxa:-New taxa:-Non-mammalian:...	Valid.	uK
Vinialesaurus Vinialesaurus Vinialesaurus is a genus of plesiosaur from the Late Jurassic Jagua Formation of Pinar del Río, Cuba. The type species is Vinialesaurus caroli, first described as Cryptocleidus caroli by De la Torre and Rojas in 1949, and redescribed by Gasparini, Bardet and Iturralde in 2002...	Gasparini Bardet Vinent Iturralde	2002 2002 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Pterosaurs:In October, a partial Mesadacylus wing was discovered in the Kingsview Quarry of Colorado...	Valid.	uJ
Westphaliasaurus Westphaliasaurus Westphaliasaurus is an extinct genus of plesiosaurid from Lower Jurassic deposits of Westfalia, northwestern Germany. It is known from a nearly complete and articulated skeleton missing the skull and about 38% of the upper neck vertebrae...	Schwermann Sander	2011 2011 in paleontology -Lobopods:-Arachnids:-Insects:-Newly named jawless vertebrates:-Newly named acanthodian:-Newly named cartilaginous fishes:-Newly named bony fishes:-Newly named lepospondyls:-Newly named temnospondyls:-Newly named lissamphibians:...	Valid.	lJ	Europe Europe Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...
Woolungasaurus Woolungasaurus Woolungasaurus glendowerensis was a plesiosaur, an extinct marine reptile, of the family Elasmosauridae...	Persson	1960 1960 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	Valid.	lK
Yuzhoupliosaurus Yuzhoupliosaurus Yuzhoupliosaurus is an extinct genus of plesiosaur from the Middle Jurassic of China. The genus is known only from a lower jaw, a vertebra, and fragments of a pectoral girdle...	Zhang	1985 1985 in paleontology -Insects:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:-Non-mammalian:-References:...	Valid.	mJ Middle Jurassic The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from 176-161 million years ago. In European lithostratigraphy, rocks of this Middle Jurassic age are called the Dogger....
Zarafasaura Zarafasaura Zarafasaura is an extinct genus of elasmosaurid known from the Oulad Abdoun Basin of Morocco.-Description:Zarafasaura is known from the holotype OCP-DEK/GE 315, an articulated incomplete dorsoventrally crushed skull and mandible and from the paratype OCP-DEK/GE 456, a complete mandible...	Vincent Pereda-Suberbiola Bouya Amaghzaz Meslouh	2011 2011 in paleontology -Lobopods:-Arachnids:-Insects:-Newly named jawless vertebrates:-Newly named acanthodian:-Newly named cartilaginous fishes:-Newly named bony fishes:-Newly named lepospondyls:-Newly named temnospondyls:-Newly named lissamphibians:...	Valid.	uK	Africa Africa Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...

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Scope and terminology

The list

See also