List of ammonites
Encyclopedia
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 are included in the subclass †Ammonoidea, excluding purely vernacular terms. The list includes genera that are commonly accepted as valid, as well the those that may be invalid, doubtful (nomina dubia
Nomen dubium
In zoological nomenclature, a nomen dubium is a scientific name that is of unknown or doubtful application...
), or were not formally published (nomina nuda
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 ammonites.
Reliability of this list
Most of the generic names in this list come from Jack SepkoskiJack Sepkoski
J. John Sepkoski Jr., , was a University of Chicago paleontologist. Sepkoski studied the fossil record and the diversity of life on Earth. Sepkoski and David Raup contributed to the knowledge of extinction events...
's 2002 compendium of marine fossil genera, which can be corroborated by other sources such as Part L, Ammonoidea, in the
Treatise on Invertebrate Paleontology
Treatise on Invertebrate Paleontology
The Treatise on Invertebrate Paleontology published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and covering every phylum, class, order, family, and genus of fossil and...
. Additional generic names included come from the Treatise or various peer review scientific journals.
Ac
- AcanthaecitesAcanthaecitesAcanthaecites is an extinct genus of cephalopod belonging to the Ammonite subclass that was first described by Rollier in 1909. Even though some of ammonites lived rather sedentary bottom dwelling lives, Acanthaecites was an active, mobile predator that lived a nektonic life style...
- AcanthinitesAcanthinitesAcanthinites is an extinct genus of cephalopod belonging to the Ammonite subclass which was described by Mojsisovics in 1893. Acanthinites has only one described species, A. magnificus and lived in what is now the province of British Columbia in western Canada...
- Acanthoceras
- Acanthoceratites
- Acanthoclymenia
- AcanthodiscusAcanthodiscusAcanthodiscus is an extinct ammonoid cephalopod genus from the order Ammonitida and included in the persphinctacean family Berriasellidae. The type, named by Bruguière ,1779, is Acanthodiscus radiatus.-Description:...
- AcanthohoplitesAcanthohoplitesAcanthohoplites is a Lower Cretaceous ammonite in the family Douvilleiceratidae that has a strongly ribbed shell and ammonitic suture.Early whorls are coronate, which later become round, then oval in section. Primary ribs may have swellings at the umbilicus or are without. In early stages primary...
- AcantholytocerasAcantholytocerasAcantholytoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AcanthopleurocerasAcanthopleurocerasAcanthopleuroceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AcanthoplitesAcanthoplitesAcanthoplites is an extinct genus of cephalopod belonging to the Ammonite subclass. Like many other Ammonites, Acanthoplites was a marine nektonic carnivore.-Fossil Record:...
- AcanthoscaphitesAcanthoscaphitesAcanthoscaphites is an extinct genus of cephalopod belonging to the Ammonite subclass. The average diameter of its shell was approximately three fourths of an inch, but some specimens have been found with a diameter of slightly over two inches....
- AcompsocerasAcompsocerasAcompsoceras is an extinct genus of cephalopod belonging to the Ammonite subclass. It grew to a large size compared to most ammonites. Its shell reached in diameter when the animal reached adulthood...
- AconecerasAconecerasAconiceras is an early Cretaceous ammonite included in the oppeliid subfamily Aconeceratidae, characterized by an involute, high-whorled, flat-sided shell that bears a finely serrate keel along the venter. Sutures have narrower and deeper elements than in Protaconeceras. Aconeceras has been found...
- Acriclymenia
- AcrimerocerasAcrimerocerasAcrimeroceras is an oxyconic Devonian gonitite and one of three genera included in the subfamily Paratornoceratinae. The others being Paratornoceras and Paratoceras or ex Polonites....
- AcriocerasAcriocerasAcrioceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- Acrocanites
- AcrochordicerasAcrochordicerasAcrochordiceras is a Middle Triassic ammonoid cephalopod belonging to the ceratitid family Acrochordiceratidae, included in the superfamily Ceratitaceae....
- AcuaricerasAcuaricerasAcuariceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AcuticostitesAcuticostitesAcuticostites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AcutimitocerasAcutimitocerasAcutimitoceras is a genus belonging to the Acutimitoceratinae subfamily of the Prionoceratidae family, a member of the Goniatitida order. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the...
Ae
- AegasterocerasAegasterocerasAegasteroceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AegocerasAegocerasAegoceras is an evolutely wound ammmonite, with wide spaced ribs, from the Early Jurassic included in the Liparoceratidae and superfamily Eoderoceratidae. Related genera are Leparoceras and Beaniceras.-References:*...
- AegocriocerasAegocriocerasAegocrioceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AegolytocerasAegolytocerasAegolytoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AenigmatocerasAenigmatocerasAenigmatoceras is a genus of ammonite cephalopod from the Carboniferous of Russia. It is tentatively placed within the family Cravenoceratidae based on similarities with Tympanoceras.-References:* accessed on 10/01/07...
Al
- AlanitesAlanitesAlanites is an extinct Triassic ammonoid cephalopod genus named by Shevyrev, 1968, found in association with Laboceras and Megaphyllites in Siberia and assigned to the ceratitid family Khvlaynitidae which is part of the Dinaritaceae. Its type is Alanites visendus .-References:*...
- AlaocerasAlaocerasAlaoceras is an ammonoid cephalopod from the upper Paleozoic included in the goniatitid family Cravenoceratidae, named by Ruzhentsev & Bogoslovskaya in 1971....
- AlbanitesAlbanitesAlbanites is an extinct cephalopod genus belonging to the ammonoid order Ceratitida that lived during the Early Triassic.The shell of Albanites is more or less involute, smooth or faintly ribbed. Sides are flattened; the venter, which is the outer rim, is broadly rounded...
- AlcidellusAlcidellusAlcidellus is an oxyconic haploceratacean ammonite from the Middle Jurassic.Alcidellus was named as a genus buy Gerd Westermann in 1958. It is now generally seen as a subgenus of Oxycerites, differing from Oxyceratites in having a broader venter with ventrolateral shoulders...
- AldanitesAldanitesAldanites is an extinct cephalopod genus belonging to the ammonoid order Goniatitida.Aldanites, named by Ruzhencev, 1965, is confined to the Lower Pennsylvanian Period and is included in the Orulganitidae, a family in the Schistoceratacea, a gonititid superfamily.-References:** Saunders, Work,and...
- AlfelditesAlfelditesAlfeldites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AlgericerasAlgericerasAlgericeras is an extinct Ammonite genus belonging to the Acathoceratacea that lived during the Cenomanian stage at the beginning of the Late Cretaceous in what is now Mexico....
- AlgeritesAlgeritesAlgerites is middle Cretaceous anisoceratid ammonoid with a close-coiled adult shell in which the whorls at that stage are in close contact, after starting of with openly coiled whorls, and in which every rib has a pair of sharp ventral tubercles.Algerites, which is found in North Africa, named...
- AlligaticerasAlligaticerasAlligaticeras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AlloceratitesAlloceratitesAlloceratites is an ammonoid cephalopod genus from the Middle Triassic of Germany included in the family Ceratitidae.The mature shell of Alloceratites has strong, well spaced lateral tubercles and clavi along either side of the venter. Ribbing between tubercles is indistinct. The suture is...
- AlloclionitesAlloclionitesAlloclionites is an extinct ammonoid cephalopod genus within the family Clionitidae which is part of the ceratitid superfamily Clydonitaceae...
- AllocriocerasAllocriocerasAllocrioceras is an ammonoid cephalopod from the mid-Cretaceous included in the turrilitacean family Anisoceratidae. Its shell is strongly ribbed and is in the form of a widely open spiral.-Classification:...
- AlloptychitesAlloptychitesAlloptychites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AlmitesAlmitesAlmites is a genus belonging to the Marathonitidae families. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- AlmohaditesAlmohaditesAlmohadites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AlocolytocerasAlocolytocerasAlocolytoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AlpinitesAlpinitesAlpinites is a genus belonging to the Discoclymeniinae subfamily, a member of the Goniatitida order. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:* accessed on 10/01/07...
- AlsatitesAlsatitesAlsatites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AltudocerasAltudocerasAltudoceras is a genus belonging to the Pseudogastrioceratinae subfamily. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- AluritesAluritesAlurites is a genus belonging to the Gastriocerataceae superfamily. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
Am
- AmaltheusAmaltheusAmaltheus is an oxyconic ammonite with a fairly open umbilicus, serrated keel, and slightly sigmoidal ribs from the Lower Jurassic, many of which are strigate. Amaltheus, named by de Montfort ,1808, is indicative of the upper Pliensbachian stage in Europe, north Africa, Caucasus, Siberia, N...
- AmarassitesAmarassitesAmarassites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AmaurocerasAmaurocerasAmauroceras is an extinct genus of eoderoceratacean ammonites in the family Amaltheidae.-References:* Arkell, et al, 1957. Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L; Geological Society of America and University Kansas press....
- AmmonellipsitesAmmonellipsitesAmmonellipsites is a genus belonging to the Ammonellipsitinae subfamily. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- AmmonitocerasAmmonitocerasAmmonitoceras is an extinct genus of cephalopod belonging to the Ammonite subclass.Type-species : Ammonitoceras ucetiae DUMAS 1876...
- AmmonoceratitesAmmonoceratitesAmmonoceratites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AmoebitesAmoebitesAmoebites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AmoebocerasAmoebocerasAmoeboceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AmphipoanocerasAmphipoanocerasAmphipoanoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AmphistephanitesAmphistephanitesAmphistephanites is an extinct genus of cephalopod belonging to the Ammonite subclass.- References :*...
- AmpthilliaAmpthilliaAmpthillia is an extinct genus of cephalopod belonging to the Ammonite subclass....
An
- AnacleonicerasAnacleonicerasAnacleoniceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnadesmocerasAnadesmocerasAnadesmoceras is an hoplitid ammonite from the lower Albian of England, included in the subfamily Cleoniceratinae. Anadesmoceras has a shell shaped more or less like a compressed Cleoniceras but with faint ornament only on the inner whorls. The shell has bundled growth striae...
- AnaflemingitesAnaflemingitesAnaflemingites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnagaudrycerasAnagaudrycerasAnagaudryceras is an extinct genus of cephalopod belonging to the Ammonite family Gaudryceratidae.-References:* Accessed on 9/24/07...
- AnagymnitesAnagymnitesAnagymnites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnagymnotocerasAnagymnotocerasAnagymnotoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnahamulinaAnahamulinaAnahamulina is an extinct ammonoid cephalopod genus from the Lower Cretaceous. Named by Hyatt, 1900, Anahamulina is included in the family Ptychoceratidae, which is part of the Turrilitaceae....
- AnahoplitesAnahoplitesAnahoplites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnaklinocerasAnaklinocerasAnaklinoceras is a genus of extinct heteromorph ammonite cephalopod that lived in marine environments in what is now Western North America during the Campanian division of the Cretaceous period...
- AnalytocerasAnalytocerasAnalytoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnanoritesAnanoritesAnanorites is an extinct cephalopod belonging to the ceratitd family Noritidae found in the Middle Triassic of the Himalaya. The shell is thinly discoidal, evolute, and smooth; cross section highly compressed; venter narrowly rounded except at the late stage where sharp shoulders are developed.As...
- AnapachydiscusAnapachydiscusAnapachydiscus is an extinct cephalopod genus from the Upper Cretaceous, Coniacian - Maastrichtian of Europe, Africa, Madagascar, S.India, N Z, Calif. Mexico, Argentina, and the antarctic belonging to the ammonoid family Pachydiscidae....
- Anarcestes
- AnascaphitesAnascaphitesAnascaphites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnasibiritesAnasibiritesAnasibirites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnasirenitesAnasirenitesAnasirenites is an extinct ammonoid cephalopod genus within the family Trachyceratidae which is part of the ceratitid superfamily Clydonitaceae; sometimes considered a subgenus of Sirenites. Anasirenites is characterized by a ventral furrow bordered on either side by a continuous keel. The shell,...
- AnatibetitesAnatibetitesAnatibetites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnatomitesAnatomitesAnatomites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnatropitesAnatropitesAnatropites is a genus in the ceratitid family Tropitidae with spines instead of nodes on the umbilical shoulder, at least in early whorls. Ceratitids are mostly Triassic ammonoid cephalopods...
- AnatsabitesAnatsabitesAnatsabites is a genus of cephalopod belonging to the Atsabitidae family. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- AnavirgatitesAnavirgatitesAnavirgatites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnaxenaspisAnaxenaspisAnaxenaspis is an extinct genus of cephalopod belonging to the Ammonite subclass....
- Anclyoceras
- AncoliocerasAncoliocerasAncolioceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AndersonitesAndersonitesAndersonites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnderssonocerasAnderssonocerasAnderssonoceras is a small, smooth ammonite with a flared umbilical shoulder, like Prototoceras, assiged to the ceratitid family Anderssonoceratidae as the type, but once included in the Otoceratidae....
- AndesitesAndesitesAndesites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AndicerasAndicerasAndiceras is an enigmatic perisphinctacean ammonite belonging to the neocomitid subfamily Berriasellinae. Andiceras was named by Krantz in 1926 and is known from early Cretaceous, Berriasian, sediments in South America.-References:...
- AndrogynocerasAndrogynocerasAndrogynoceras is an extinct genus of cephalopod belonging to the Ammonite subclass. The Green Ammonite Beds of the Dorset Coast are named after Androgynoceras lataecosta which has chambers filled with green calcite.- Species of Androgynoceras :...
- Anetoceras
- AneuretocerasAneuretocerasAneuretoceras is an extinct genus of cephalopod belonging to the Ammonite subclass. It was assigned to Ammonoidea by Sepkoski ....
- AnfacerasAnfacerasAnfaceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AngranocerasAngranocerasAngranoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AngulaticerasAngulaticerasAngulaticeras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnisarcestesAnisarcestesAnisarcestes is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnisocerasAnisocerasAnisoceras is an extinct genus of cephalopods belonging to the Anisoceratidae family of the Ammonite subclass.- References :* http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=14564&is_real_user=1...
- AnkinatsytesAnkinatsytesAnkinatsytes is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AnnulocerasAnnulocerasAnnuloceras is an extinct genus of ammonite cephalopod. Its fossils are found in Lower Barremian sediments from California...
- AnolcitesAnolcitesAnolcites is an extinct ammonoid cephalopod genus from the Middle Triassic belonging to the ceratitid family Trachyceratidae.Specifically Anolcites is a middle Triassic trachyceriatid with no distinct ventral furrow and ribs that cross the venter. The shell is basically evolute and highly...
- AnotocerasAnotocerasAnotoceras is a smooth shelled, discoidal ammonite with a depressed, subtrigonal whorl section and ceratitic sutures included in the ceratitid family Otoceratidae.Anotoceras comes from the Lower Triassic of the Himalaya-References:...
- AnthracocerasAnthracocerasAnthracoceras is a genus belonging to the Anthracoceratidae family. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- AnthracoceratitesAnthracoceratitesAnthracoceratites is an extinct genus belonging to the of the Dimorphoceratidae family. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids....
- AnthracoceratoidesAnthracoceratoidesAnthracoceratoides is a genus belonging to the Anthracoceratidae family. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
Ap
- AphanitesAphanitesAphanites is a Lower Pennsylvanian ammonite belonging to the Goniatitid family Reticuloceratidae which are characterized by involute subdiscoidal shells covered by linear or biconvex growth lines that may be crossed by longitudinal lirae, producing a reticulate pattern. Sutures are simple, the...
- ApleurocerasApleurocerasApleuroceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AplococerasAplococerasAplococeras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ApoderocerasApoderocerasApoderoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ApsorrocerasApsorrocerasApsorroceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
Ar
- AraneitesAraneitesAraneites is a genus belonging to the Sporadoceratinae subfamily of the Prionoceratidae family, a member of the Goniatitida order. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the...
- AraxocerasAraxocerasAraxoceras is an extinct genus of ammonite cephalopod that lived in the Permian to Early Triassic. They had distinct, angular shells which are found throughout the world....
- ArcanocerasArcanocerasArcanoceras is a genus belonging to the Eogonioloboceratidae family. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- ArcestesArcestesArcestes is an extinct ammonite cephalopod genus belonging to the Ceratitida. Their shells were broad and rounded, giving them an almost spherical appearance. Unlike many other ammonites, the shells of Arcestes lack keels that would otherwise stabilize them while swimming...
- Archoceras
- ArcthoplitesArcthoplitesArcthoplites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ArcticocerasArcticocerasArcticoceras is an extinct ammonoid cephalopod genus from the late Middle Jurassic belonging to the ammonite family Cardioceratidae, more commonly found to high northern latitudes....
Ar (Cont.)
- ArctocephalitesArctocephalitesArctocephalites is an extinct ammonitic cephalopod genus from the Middle Jurassic with a wide northern distribution belonging to the stephanoceratacean family, Cardioceratidae....
- ArctocerasArctocerasArctoceras is a ceratitid ammonoid genus from the Lower Triassic with a moderately narrow discoidal shell and ceratitic suture.The shell of Arctoceras is generally involute with compressed whorls that are much higher than wide, flattened sides, narrowly rounded ventral rim, and sutures with wide...
- ArctogymnitesArctogymnitesArctogymnites is an ammonoid cephalopod from the middle Triassic included in the ceratitid subfamily Beyrichitinae. Related genera include Beyrichites, Frechites, Gymnotoceras, and Salterites...
- ArctohungaritesArctohungaritesArctohungarites is a Triassic ammonoid now placed in the ceratitid family Danubitidae, but previously included in the Hungeritidae.The shell of Arctohungerites is subdiscoidal, involute, with a rounded venter, weak sigmoidal folds on the body chamber and a distinct ventral keel on the distal end...
- ArctomeekocerasArctomeekocerasArctomeekoceras is a genus from the ammonoid order Ceratitida from the Early Triassic, included in the Meekoceratidae; a family characterized by more of less involute, compressed, discoidal forms that are smooth or weakly ornamented and have a ceratitic suture with broad saddles.Arctomeekoceras...
- ArctomercaticerasArctomercaticerasArctomercaticeras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ArctoprionitesArctoprionitesArctoprionites is an extinct ammonite genus from the Triassic, belonging to the ceratitid family Prionitidae. It has been found in Canada in British Columbia, in Japan, Kazakhstan, and in the U.S. in Nevada.-References:-----------------------...
- ArctoptychitesArctoptychitesArctoptychites is an extinct cephalopod genus belonging to the ceratitid family Ptychitidae, and related to such genera as Ptychites and Aristoptychites; all from the Triassic...
- ArctosirenitesArctosirenitesArctosirenites is an extinct ceratitid ammonoid from the Triassic of British Columbia and Nunavut, Canada, included in the Trachyceratidae.-References:-------------*...
- ArctotirolitesArctotirolitesArctotirolites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ArestocerasArestocerasArestoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ArgentinicerasArgentinicerasArgentiniceras is an extinct genus of cephalopod belonging to the Ammonite subclass. Its fossils was found in , , , and .-External links:...
- ArgolitesArgolitesArgolites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ArgonauticerasArgonauticerasArgonauticeras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ArgosirenitesArgosirenitesArgosirenites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ArianitesArianitesArianites is an extinct genus of Cephalopod belonging to the Ammonite subclass....
- AricocerasAricocerasAricoceras is an extinct genus of the Adrianitidae family. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- ArieticerasArieticerasArieticeras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ArietitesArietitesArietites is a genus of massive, giant evolute, psiloceratacean ammonites in the family Arietitidae in which whorls are subquadrate and transversely ribbed and low keels in tripicate, separated by a pair of longitudinal grooves, run along the venter...
- ArietoceltitesArietoceltitesArietoceltites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ArisphinctesArisphinctesArisphinctes is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AristocerasAristocerasAristoceras is a genus belonging to Goniatitina suborder. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- AristoceratoidesAristoceratoidesAristoceratoides is a genus belonging to Goniatitina suborder. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- AristoptychitesAristoptychitesAristoptychites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ArkanitesArkanitesArkanites is a genus belonging to the Gastriocerataceae superfamily. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- ArmatitesArmatitesArmatites is an ammonoid genus belonging to the Aulatornoceratinae subfamily, a member of the Goniatitida order. Goniatitites are an extinct group of ammonoids, shelled cephalopods related to squids, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:* accessed on 10/01/07...
- ArnioceltitesArnioceltitesArnioceltites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ArniocerasArniocerasArnioceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ArniotitesArniotitesArniotites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ArpaditesArpaditesArpadites is a genus in the Ceratitid family Arpaditidae from the Middle and Upper Triassic of the Alps, Italy, Balkans, Himalayas, and Japan...
- ArthaberitesArthaberitesArthaberites is a ceratitid cephalopod included in the Noritidaethat lived during the Middle Triassic, found in the Alps and Balkans of Europe. Its type is A. alexandrae...
- ArtinksiaMedlicottiinaeThe Medlicottiinae a subfamily of the Medlicottiidae, a family of ammonoid cephalopods included in the Prolecanitida, characterized by having discoidal to thinly lenticular shells with a retuse venter and sutures with bifid auxiliary lobes....
- Artioceras
- Artioceratoides
As
- AsaphocerasAsaphocerasAsaphoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AsapholytocerasAsapholytocerasAsapholytoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AsklepiocerasAsklepiocerasAsklepioceras is a genus in the Ceratitid family Arpaditidae from the Middle and Upper Triassic of Europe, Asia, and British Columbia....
- AspenitesAspenitesAspenites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AsphinctitesAsphinctitesAsphinctites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AspidocerasAspidocerasAspidoceras is an extinct ammonoid cephalopod genus that lived during the Late Jurassic with a fairly broad distribution...
- AspidostephanusAspidostephanusAspidostephanus is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AspinocerasAspinocerasAspinoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AsterocerasAsterocerasAsteroceras is an extinct genus of cephalopod belonging to the Ammonite subclass. Asteroceras fossils may be found at Lyme Regis in the Asteroceras obtusum zone of Upper Sinemurian age.-Species:* Asteroceras confusum* Asteroceras obtusum...
- AsthenocerasAsthenocerasAsthenoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AstiericerasAstiericerasAstiericeras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AstieridiscusAstieridiscusAstieridiscus is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AstreptocerasAstreptocerasAstreptoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AsturocerasAsturocerasAsturoceras is an extinct genus of cephalopod belonging to the Ammonite subclass. It was formally placed in this genus during the year 1969 by paleontologists Ruzhencev and Bogoslovskaya. Like all cephalopods, Asturoceras was a marine predator. Unlike some Ammonites who were sedentary bottom...
Au
- AudaxlytocerasAudaxlytocerasAudaxlytoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- Augurites
- AulacosphinctesAulacosphinctesAulacosphinctes is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AulacosphinctoidesAulacosphinctoidesAulacosphinctoides is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AulacostephanusAulacostephanusAulacostephanus is an extinct ammonoid cephalopod genus from the Upper Jurassic Kimmeridgian belonging to the perisphinctacean family Aulacostephanidae....
- AulasimocerasAulasimocerasAulasimoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AulatornocerasAulatornocerasAulatornoceras is a genus belonging to the Aulatornoceratinae subfamily, a member of the Goniatitida order. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:* accessed on...
- AustinicerasAustinicerasAustiniceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AustralicerasAustralicerasAustraliceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AustroceratitesAustroceratitesAustroceratites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- AustrotrachycerasAustrotrachycerasAustrotrachyceras is an extinct genus belonging to the extinct subclass of cephalopods known as the ammonites-Classification:This ammonite genus was originally published as a sub-genus of Trachyceras....
Ax
- AxinolobusAxinolobusAxinolobus is a genus belonging to the Axinolobidae family. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- AxonocerasAxonocerasAxonoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
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B
- BacchitesBacchitesBacchites is an extinct ammonoid cephalopod genus belonging to the ceratitid family, Juvavitidae.Bacchites, named by Smith, 1927, has a subspherical shell with the closed umbilicus, the surface of which is almost smooth except for faint transvere ribs, vestigial constrictions, and a faint...
- Bactrites
- BaculinaBaculinaBaculina is an extinct ammonoid cephalopod genus belonging to the ancylocerid family Bochianitidae. Baculina is known from the Valanginian of the Lower Cretaceous.-References:...
- Baculites
- BadiotitesBadiotitesBadiotites is an extinct ammonoid cephalopod genus belonging to the ceratitid family, Badiotitidae. It was previously included with Lecanites in the Lecanitidae, a family formerly of the Clydonitaceae but re-assigned by Tozer to the Danubitaceae...
- Bagnolites
- BalatonitesBalatonitesBalatonites is an extinct cephalopod genus belonging to the ceratitid family Balatonitidae. There are at least four known species: B. balatonicus, B. oyama, B. shoshonensis, and B. zitteli....
- BalearitesBalearitesBalearites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BalkanitesBalkanitesBalkanites is an extinct ammonite , belonging to the ceratitid superfamily Ceratitacea and family Tirolitidae. It is restricted to the Triassic. As common to the family, the shell is evolute with lateral tubercles. The suture is not eleborate....
- BalticerasBalticerasBalticeras is an involute, discoidal Upper Jurassic ammonite found in England, Germany, and Switzerland, belonging to the Perisphinctidae. The shell is strongly embracing, tending to be oxyconic...
- BalviaBalviaBalvia is an ammonoid cephalopod genus from the Upper Devonian belonging to the goniatitid family Prionoceratidae.Balvia has a small, lenticular to subglobular shell with a punctate umbilicus, that is completely involute. Growth lines are fine, forward slanting, concavo-convex; indicate well...
- Bamyaniceras
- BaronnitesBaronnitesBaronnites is an ammonoid cephalopod from the upper Valanginian stage of the Lower Cretaceous. Baronnites is represented by a single species, Baronnites hirsutus found in marine silty to sandy limestone and marl in Morocco, associated with another ammonoid, Busnardoites campylotoxus, brachiopods,...
- BarrandeitesBarrandeitesBarrandeites is an extinct genus of cephalopod belonging to the Ammonite subclass.It takes its name in honour of the paleontologist Joachim Barrande....
- BarremitesBarremitesBarremites is an ammonoid cephalopod belonging to the family Desmoceratidae, that lived during the Hauterivian and Barremian stages of the Early Cretaceous. Its shell is moderately to very involute, with the outer whorl strongly embracing the inner whorls, and variably compressed...
- BarroisicerasBarroisicerasBarroisiceras is an acanthoceratacean ammonite from the Upper Cretaceous, Coniacian, included in the family Collignoniceratidae.-Diagnosis:...
- BaschkiritesBaschkiritesBaschkirites is an extinct cephalopod genus belonging to the ammonoid order Goniatitida that lived during the Early Carboniferous for about 4 million years, from about 317 to 313 Ma.-Description:...
- BashkortocerasBashkortocerasBashkortoceras is a genus belonging to the Gastriocerataceae superfamily. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- BaskaniicerasBaskaniicerasBaskaniiceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BasleocerasBasleocerasBasleoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BauchiocerasBauchiocerasBauchioceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BayleitesBayleitesBayleites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BeanicerasBeanicerasBeaniceras is small, coarsely ribbed genus ammonite from the Lower Jurassic with coarsely ribbed rounded whorls. The shell is evolute, early whorls a barrel-shaped cadicone, later become serpenticonic.-References:...
- BeatitesBeatitesBeatites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BeleutocerasBeleutocerasBeleutoceras is a genus belonging to the Nomismoceratidae family. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- Beloceras
- BenacocerasBenacocerasBenacoceras is a strongly ribbed, evolute ammonite from the Late Jurassic, coiled so that all whorls are exposed. Ribbing is biplicate, with very short secondaries. The venter, the outer rim, is smooth, at least on the outer whorl.-References:...
- BeneckeiaBeneckeiaBeneckeia is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BenueitesBenueitesBenueites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BerbericerasBerbericerasBerbericeras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BernicerasBernicerasBerniceras is an extinct ammonite genus from the order Ammonitida that lived during the early Oxfordian stage of the Late Jurassic. Berniceras is included in the ammonite family, Oppeliidae....
- BerriasellaBerriasellaBerriasella is a discoidal evolute perisphinctacean ammonite, and type genus for the neocomitid subfamily Berriasellinae. Its ribbing is distinct, consisting of both simple and bifurcated ribs that extend from the umbilical seam across the venter; its whorl section generally compressed, the venter...
- BerrosicerasBerrosicerasBerrosiceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BetyokitesBetyokitesBetyokites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BeudanticerasBeudanticerasBeudanticeras is an extinct cephalopod genus from the Cretaceous period belonging to the ammonoid subclass and included in the family Desmoceratidae....
- BeudantiellaBeudantiellaBeudantiella is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BevahitesBevahitesBevahites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BeyrichitesBeyrichitesBeyrichites is an extinct genus in the ammonoid cephalopod, order Ceratitida from the Lower and Middle Triassic of southern Europe, Asia, and western North America....
- BeyrichocerasBeyrichocerasBeyrichoceras is a genus belonging to the Goniatitid family, Maxigoniatitidae that lived during the Mississippian Period -Description:...
- BeyrichoceratoidesBeyrichoceratoidesBeyrichoceras is a genus belonging to the Goniatitid family, Muensteroceratidae, a group of ammonoids, extinct shelled cephalopods related to belemnites and recent coleoids and more distantly to the nautiloids-Description:...
- BhimaitesBhimaitesBhimaites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BifericerasBifericerasBifericeras is a Lower Jurassic ammonite beloning to the family Eoderoceratidae, and sometimes placed in the subfamily Xipherceratinae. Whorls are strongly depressed, but still evolute in coiling...
- BigotitesBigotitesBigotites is strongly ribbed, round-whorled perisphinctid ammonitic cephalopod from the middle Jurassic with a smooth band along the outer edge of the shell.-References:-------------------------------...
- BihendulocerasBihendulocerasBihenduloceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BilinguitesBilinguitesBilinguites is a genus belonging to the Gastriocerataceae superfamily. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- BillcobbanocerasBillcobbanocerasBillcobbanoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- BiloclymeniaBiloclymeniaBiloclymenia is a genus in the ammonoid order Clymeniida which is characterized by a dorsal retrosiphonitic siphuncle with long adapically pointing septal necks....
- BiltneritesBiltneritesBiltnerites is an ammonite genus from the lower Triassic included in the ceratitacean family Tirolitidae of the order Ceratitida, characterized by a flat, evolute shell with moderately compressed, rounded whorls...
- BinatisphinctesBinatisphinctesBinatisphinctes is an extinct genus of cephalopod belonging to the Ammonite subclass....
- Binneyites
- Biplices
- BisatocerasBisatoceratidaeBisatoceratidae is one of two families of the Goniatitina suborder. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- BlanfordicerasBlanfordicerasBlanfordiceras is a strongly ribbed, evolute ammonite included in the perisphinctacean family, Neocomitidae that lived during the latest Jurassic....
- BochianitesBochianitesBochianites is a straight shelled ammonite which lived from the Upper Jurassic, Tithonian, to the Lower Cretaceous, Hauterivian. The shell long, narrow, moderately expanding; smooth or with weak to strong oblique annular ribs. Sutural elements short and boxy...
- Bodylevskites
- Boehmoceras
- Boesites
- Bogdanoceras
- Bollandites
- Bollandoceras
- Boreomeekoceras
- Borissjakoceras
- Borkinia
- Bornhardticeras
- Bosnites
- BostrychocerasBostrychocerasBostrychoceras is a genus of ammonite from the Late Cretaceous. Its fossils have been found in Europe and North America.- Sources :* Ammonoid Paleobiology by Neil H. Landman, Kazushige Tanabe, and Richard Arnold Davis...
- Boucaulticeras
- Bouleiceras
- BradfordiaBradfordiaBradfordia is a moderately involute to involute genus included in the ammonoid cephalopod family Oppeliidae, coiled so that the outer whorl encloses most, or much, of the previous, but with a small umbilicus exposing inner whorls. The shell is compressed, whorl height much greater than width,...
- Brahmaites
- Bramkampia
- Brancoceras
- Branneroceras
- Branneroceratoides
- Brasilia
- Bredyia
- Brevikites
- Brewericeras
- BrightiaHecticocerasHecticoceras is an ammonite genus belonging to the haploceratacean family Oppeliidae, that lived during the Middle and Late Jurassic, from the early Callovian to the early Oxfordian. Hecticoceras may be seen as a series of some nine subgenera, beginning with the lower Callovian H. and H. and...
- Brodieia
- Brotheotrachyceras — originally published as a subgenus of Trachyceras
- Brouwerites
- Buchiceras
- Budaiceras
- Buddhaites
- Bukowskiites
- Bullatimorphites
- Bulogites
- Bunburyiceras
- Burckhardites
- Burijites
- Busnardoites
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Ca
- Cabrievoceras
- Cadoceras
- CadomitesCadomitesCadomites is an extinct ammonite genus from the superfamily Stephanocerataceae that lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- CadomocerasCadomocerasCadomoceras is an extinct cephalopod genus from the order ammonitida that lived during the Bajocian Stage of the Middle Jurassic, approximately 178 to 175 million years ago....
- Caenisites
- Caenocyclus
- Caenolyroceras
- Cainoceras
- Calaiceras
- Californiceras
- Callihoplites
- Calliphylloceras
- Calliptychoceras
- Callizoniceras
- Caloceras
- Calycoceras
- Campylites
- Canadoceras
- Canavarella
- Canavaria
- Canavarites
- Cancelloceras
- Cantabricanites
- Cantabrigites
- Cardiella
- Cardioceras
- Carinoceras
- Carinoclymenia
- Carinophylloceras
- Carnites
- Carstenia
- Carthaginites
- Catacoeloceras
- Catasigaloceras
- Catulloceras
- Caucasites
- CaumontisphinctesCaumontisphinctesCaumontisphinctes is an ammonoid genus from the ammonitid superfamily Perkinsonataceae that lived during the Bajocian stage of the Middle Jurassic...
- Cavilentia
Ce
- Celaeceras
- Cenisella
- CeratitesCeratitesCeratites is an extinct genus of ammonite cephalopod that lived in marine habitats in what is now Europe, Asia, and North America during the Triassic. It has a ceratitic suture pattern on its shell....
- Ceratpbeloceras
- Chamoussetia
Ch
- ChanasiaHecticocerasHecticoceras is an ammonite genus belonging to the haploceratacean family Oppeliidae, that lived during the Middle and Late Jurassic, from the early Callovian to the early Oxfordian. Hecticoceras may be seen as a series of some nine subgenera, beginning with the lower Callovian H. and H. and...
- Changhsingoceras
- CheilocerasCheilocerasCheiloceras is a subglobular to thickly lenticular goniatite with a closed umbilicus from the Upper Devonian and type genus for the Cheiloceratidae....
- Cheloniceras
- Cheltonia
- Chesapeakiceras
- Chetaites
- Chioceras
- Chiotites
- Choffatia
- Choffaticeras
- ChondrocerasChondrocerasChondroceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
Ch (Cont.)
- Choristoceras
- Christioceras
- Christophoceras
- Chumazites
Cl
- Cladiscites
- Clambites
- CleistosphinctesCleistosphinctesCleistosphinctes is an extinct cephalopod genus from the ammonite order that lived during the Middle Jurassic approximately 174 to 170 million years ago....
- CleonicerasCleonicerasCleoniceras is a rather involute, high-whorled hoplitid from the Lower to basal Middle Albian of Europe, Madagascar, and Transcaspian region...
- Clinolobus
- Clionitites
- Clioscaphites
- Clistoceras
- Cloioceras
- Cluthoceras
- Clydomphalites
- Clydoniceras
- Clydonites
- ClymeniaClymeniaClymenia is a genus in the ammonoid order Clymeniida, restricted to the Upper Devonian, characterized as with all clymeniids by a dorsal siphuncle that runs along the inside of the whorls, unusual for ammonoids....
- Clymenoceras
- Clypeoceras
Co
- Coahuilites
- Cobbanites
- Cobbanoscaphites
- Cochleiferoceras
- Cochloceras
- Cochlocrioceras
- Coeloceltites
- Coeloceras
- Coeloderoceras
- CoilopocerasCoilopocerasCoilopoceras is a compressed, involute, lenticular ammonitid from the Upper Cretaceous with a narrow venter and raggedy ammonitic suture; type of the Coilopceratidae, a family in the Acanthocerataceae of the suborder Ammonitina....
- Colchidites
- Collectoceras
- CollignonicerasCollignonicerasCollignociceras is an evolute, strongly ribbed and tuberculate ammonoid from the Upper Cretaceous of the western United States and Europe belonging to the ammonite family Collignoniceratidae. The type is Ammonites woollgari, named by Mantell in 1822 for specimens from Sussex, England.Wright...
- Collignonites
- Collina
- Collotia
- Colombiceras
- Coloradoscaphites
- Columbites
- Concavites
- Conlinoceras
- Constileioceras
- Convoluticeras
- Cordubiceras
- Coroceras
- Corongoceras
- CoronicerasCoronicerasCoroniceras is a genus in the Arietitidae, a family in the ammonitid superfamily Psiloceratiaceae, from the lower Sinermurian stage in the Lower Jurassic. It is a sub zone ammonite of the Armioceras semicostotum Zone...
- Coronites
- Costaclymenia
Co (Cont.)
- Costidiscus
- Costileioceras
- Costimitoceras
- Cottreauites
- Couloniceras
- Cowtoniceras
Cr
- CranocephalitesCranocephalitesCranocephalites is a Middle Jurassic ammonitid genus named by Spath in 1932 and included in the family Cranoceratidae, superfamily Stephanoceratacea....
- Craspedites
- Craspedodiscus
- Crassiceras
- Crassiplanulites
- Crassotornoceras
- Cravenites
- CravenocerasCravenocerasCravevoceras is an Upper Paleozoic ammonite in the gonititid family Cravenoceratidae, probably derived from Pachylyroceras and contemporaty with other cravenoceratid genera like Caenolyroceras, Tympanoceras and later Alaoceras and Lyrogoniatites...
- Cravenoceratoides
- CrenicerasCrenicerasCreniceras is a rather small Upper Jurassic ammonite with a shell in the range of about 1.6 cm in diameter,. The shell of Creniceras is eccentrically coiled, compressed, and generally smooth, except for a median row of cockscomb serrations on the body chamber and the possibility of blunt...
- Crickites
- Crimites
- CriocerasCriocerasCrioceras is an extinct cephalopod genus belonging to the subclass Ammonoidea and included in the family Crioceratidae of the ammonitid superfamily Ancylocerataceae. Crioceras is considered by some to be a junior synomym of Crioceratites...
- CrioceratitesCrioceratitesCrioceratites is an ammonite genus from the Early Cretaceous belonging to the Ancylocerataceae.Crioceritites is coiled in an open, normally equiangular spiral with an oval or subquadrate whorl section...
- Cruasiceras
- CrucilobicerasCrucilobicerasCrucilobiceras is an ammonoid cephalopod genus from the Lower Jurassic belonging to the eoderoceratacean family Eoderoceratidae. Cruciliboceras has an evolute shell, such that all whorls are well exposed, with persistent radial ribbing and with spines or tubercles on the outer, ventral, rim, and...
- Crussoliceras
- Cryptoclymenia
- Cryptotexanites
Cu
- Cubaochetoceras
- Cuccoceras
- Cuneicardioceras
- Cunitoceras
- Cunningtoniceras
- Cutchisphinctes
- Cuyaniceras
Cy
- Cyclobactrites
- Cycloceltites
- CyclolobusCyclolobusClyclolobus is a smooth, essentially involute subdiscoidal goniatitid ammonoid that has sutures with a bifurcate ventral lobe, flared outwardly at the end, in which the halves may be secondarily trifurfate, ending in sharp, narrow projections...
- Cycloclymenia
- Cylioceras
- Cymaceras
- Cymaclymenia
- Cymahoplites
- Cymbites
- Cymoceras
- Cyrtobactrites
- Cyrtochilus
- Cyrtoclymenia
- Cyrtopleurites
- Cyrtosiceras
Cz
- Czekanowskites
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Da
- DactyliocerasDactyliocerasDactylioceras was a widespread genus of ammonite from the Jurassic period, approximately 172 million years ago . They are generally small, averaging 65 mm in diameter....
- Dagnoceras
- DaixitesUddenitinaeThe Uddenitinae a subfamily of the Medlicottiidae, a family of ammonoid cephalopods included in the Prolecanitida.The Uddenitinae, proposed by Miller and Furnish, and known from the Pennsylvanian and Lower Permian, are transistional between the ancestral Pronoritidae and the more more traditional...
- Dalmasiceras
- Dalmatites
- Damesiceras
- Damesites
- Danubisphinctes
- Danubites
- Daphnites
- Daraelites
- DarelliaDarelliaDarellia is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Darvasiceras
- Dasyceras
- Daxatina
- Dayiceras
De
- Decipia
- Decorites
- Deiradoceras
- Delecticeras
- Delepinoceras
- Delphinites
- Demarezites
- Derolytoceras
- Deshayesites
- Desmoceras
- Desmophyllites
- Desmoscaphites
- Devonobactrites
- Devonopronorites
Di
- Diaboloceras
- Diadochoceras
- Diaplococeras
- Diaziceras
- Dichotomites
Di (Cont.)
- Dichotomoceras
- Dichotomosphinctes
- Dickersonia
- Dicostella
- Didymites
- DidymocerasDidymocerasDidymoceras is an extinct genus of ammonite cephalopod. It is one of the most bizarrely shaped genera, with a shell that spirals upwards into a loose, hooked tip...
- Dieneria
- Difunites
- Digitophyllites
- Dilatobactrites
- Dimeroceras
- Dimeroclymenia
- DimorphinitesDimorphinitesDimorphinites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Dimorphites
- Dimorphoceras
- Dimorphoceratoides
- Dimorphoplites
- Dimorphotoceras
- Dinarites
- Diodochoceras
- Dionites
- Diplacmoceras
- Diplasioceras
- DiplesiocerasDiplesiocerasDiplesioceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Diplomoceras
- Diplosirenites
- Dipoloceras
- Dipoloceroides
- Dirrymoceras
- Discoceratites
- Discoclymenia
- Discohoplites
- Discophiceras
- Discophyllites
- Discoptychites
- DiscoscaphitesDiscoscaphitesDiscoscaphites is an extinct genus of ammonite....
- Discosphinctes
- Discosphinctoides
- Discotropites
- Distichites
- DistichocerasDistichocerasDistichoceras is a member of the Haploceratacean family, Oppeliidae, and type genus for the subfamily Distichoceratinae, found in upper Middle and lower Upper Jurassic sediments in Europe, Algeria, India, and Madagascar...
Do
- Dobrodgeiceras
- DobrogeitesDobrogeitesDobrogeites is an Early Jurassic ammonoid from the order Ceratitida, included in the family Megaphyllitidae that produced evolute compressed planispiral shells with rounded venters, inner whorls ornamented as in Tirolites, outer whorls smooth, suture with multiple smooth lobes; Initially found in...
- DocidocerasDocidocerasDocidoceras is an extinct ammonite genus from the order Ammonitida that lived during the Middle Jurassic in what is now Europe, North Africa, and Oregon. Docidoceras is included in the family Otoitidae which makes up part of the ammonite superfamily Stephanocerataceae.Docidoceras has a broad,finely...
- DolikephalitesMacrocephalitesMacrocephalites is a genus of the stephanoceratacean ammonite family Macrocephalitidae, diagnostic of the Callovian stage of the Middle Jurassic...
- DombarigloriaDombarigloriaDombarigloria is a genus belonging to the goniatitid family Cravenoceratidae; extinct ammonoids which are shelled cephalopods more closely related to squid , octopus and other coleoids than to the superficially similar Nautilus...
- DombaritesDombaritesDombarites is a genus belonging to the goniatitid family Agathiceratidae; extinct ammonoids which are shelled cephalopods more closely related to squid , octopus and other coleoids than to the superficially similar Nautilus...
- Dombarocanites
- DonetzocerasDonetzocerasDonetzoceras is a genus belonging to the goniatitid family Gonioglyphioceratidae ; extinct ammonoids which are shelled cephalopods more closely related to squid , octopus and other coleoids than to the superficially similar Nautilus...
- Dorikranites
- DorsetensiaDorsetensiaDorsetensia is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Dorsoplanites
- Doryceras
- Doubichites
- DouvilleicerasDouvilleicerasDouvilleiceras is a genus of ammonite from the Cretaceous. Its fossils have been found in Europe, North America, and South America.-External links:* in the Paleobiology Database...
Du
- DuashnocerasDuashnocerasDuashnoceras is an extinct ammonoid cephalopod genus included in the Stephanoceratidae that lived during the Bathonian stage of the Middle Jurassic...
- Dufrenoya
- Dumortieria
- Dunbarites
- Dunedinites
- Dunveganoceras
- Durangites
- DurotrigensiaDurotrigensiaDurotrigensia is a genus large to giant ammonites in the perisphinctoid family Parkinsoiniidae with sharply and finely ribbed inner whorls, smooth outer whorl, and without tubercles or lappets that lived during the Bajocian stage of the Middle Jurassic some 170 to 164 million years...
- Durvilleoceras
Dz
- Dzhaprakoceras
- Dzhulfoceras
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E
- Eboraciceras
- Eboroceras
- Ebrayiceras
- Echioceratoides
- Echiocheras
- Ectocentrites
- Ectolcites
- Edmundites
- Egrabensiceras
- Eleganticeras
- Elephantoceras
- Ellipsoceras
- Elobiceras
- Emaciaticeras
- EmileiaEmileiaEmileia is an extinct genus from a well-known class of fossil cephalopods, the ammonites, that lived during the early part of the middle Jurassic.Emileiais a large form with fine ribbing that includes may secondaries...
- Emilites
- Emperoceras
- Enayites
- Engonoceras
- Enosphinctes
- Entogonites
- Eoacrochordiceras
- Eoaraxoceras
- Eoasianites
- Eobeloceras
- Eocanites
- EocephalitesEocephalitesEocephalites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- EochetocerasHecticocerasHecticoceras is an ammonite genus belonging to the haploceratacean family Oppeliidae, that lived during the Middle and Late Jurassic, from the early Callovian to the early Oxfordian. Hecticoceras may be seen as a series of some nine subgenera, beginning with the lower Callovian H. and H. and...
- Eocrioceratites
- Eodanubites
- EoderocerasEoderocerasEoderoceras is an evolute, round whorled ammonite from the Lower Jurassic with an outer row of distinct spines, and in some, an inner row of tubercles, on either side; ribs only on the inner whorls....
- Eodesmoceras
- Eodouvilleiceras
- Eogaudryceras
- Eogonioloboceras
- Eogunnarites
- Eogymnites
- Eohecticoceras
- Eoheteroceras
- Eohyattoceras
- Eomadrasites
- Eonomismoceras
- Eopachydiscus
- Eoparalegoceras
- Eophyllites
- Eoprodromites
- Eoprotrachyceras
- Eopsiloceras
- Eosagenites
- Eoscaphites
- Eoschistoceras
- Eosturia
- Eotetragonites
- Eothalassoceras
- Eothinites
- Eotissotia
- Eowellerites
- Epacrochordiceras
- EpadrianitesEpadrianitesEpadrianites is a genus of the Adrianitidae family. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- Epancyloceras
- Eparietites
- Epaspidoceras
- Epicanites
- Epiceltites
- Epiceltitoides
- EpicephalitesEpicephalitesEpicephalites is a perisphictid ammonite, included in the subfamily Aulacostephaninae, from the Upper Jurassic of New Zealand and Mexico, related to Involuticeras. Its shell is involute, whorls inflated with a deep umbilicus...
- Epiceratites
- Epicheloniceras
- Epicosmoceras
- Epideroceras
- Epiglyphioceras
- Epiglyptoxoceras
- Epigonites
- Epigymnites
- Epihoplites
- Epijuresanites
- Epileymeriella
- Epimayaites
- Epimorphoceras
- Epipallasiceras
- Epipeltoceras
- Episageceras
- Episculites
- EpistrenocerasEpistrenocerasEpistrenoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Epithalassoceras
- Epitornoceras
- Epivirgatites
- Epiwocklumeria
- Epophioceras
- Eptitauroceras
- Erbenoceras
- Eremites
- Erinoceras
- Erioliceras
- Eristavites
- ErmocerasErmocerasErmoceras is a thomboceratid ammonite from the Middle Jurassic of central Arabia, Sinai, and Algeria with strong primary and secondary ribs and a single row of lateral tubercles; described as having a deep ventral groove...
- Erycites
- Erymnoceras
- Erymnocerites
- Esericeras
- Euagassiceras
- EuaptetocerasEuaptetocerasEuaptetoceras is an evolute hammatoceratid ammonite from the lower Middle Jurassic, included in the family Hammatoceratidae and the subfamility Hammatoceratinae. The genus may be a junior synonym for Eudmetoceras of Buckman, 1920....
- Euaspidoceras
- Eubaculites
- EubostrychocerasEubostrychocerasEubostrychoceras is a genus of helically wound, corkscew form, heteromorph ammonite which lived during the Upper Cretaceous . The genus is included in the ancycleratid family Nostoceratidae....
- Eubranoceras
- Eucalycoceras
- Eucoroniceras
- Eucycloceras
- Eudiscoceras
- EudmetocerasEudmetocerasEudmetoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Euflemingites
- EuhoplitesEuhoplitesEuhoplites is an extinct ammonoid cephalopod from the Lower Creataceous, characterized bystrongly ribbed, more or less evolute, compressed to inflated shells with flat or concave rims, typically with a deep narrow groove running down the middle. In some, ribs seem to zigzag between umbilical...
- EuhoplocerasEuhoplocerasEuhoploceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Euhystrichoceras
- Euisculites
- Eulophoceras
- Eulytoceras
- EumedlicottiaMedlicottiinaeThe Medlicottiinae a subfamily of the Medlicottiidae, a family of ammonoid cephalopods included in the Prolecanitida, characterized by having discoidal to thinly lenticular shells with a retuse venter and sutures with bifid auxiliary lobes....
- Eumorphoceras
- Euomphaloceras
- EupachydiscusEupachydiscusEupachydisus is a large, coarse-ribbed Pachydiscid ammonite genus from the Upper Cretaceous, found in Coniacian to Campanian age strata in Europe, Madagascar, Japan, and British Columbia....
- Euphylloceras
- Eupinacoceras
- Eupleuroceras
- Euprionoceras
- Euptychoceras
- Eurites
- Euroceras
- Eurycephalites
- Eurynoticeras
- Eusagenites
- Eutomoceras
- Euturrilites
- ExitelocerasExitelocerasExiteloceras is an ammonite genus from the Late Cretaceous. Its fossils have been found in Egypt, Iraq, and North America.- Sources :* A Pictorial Guide to Fossils by Gerard Ramon Case...
- Exotornoceras
- Ezilloella
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F
- Fagesia
- Falciclymenia
- Falciferella
- Falcitornoceras
- Fallacites
- Falloticeras
- Fanninoceras
- Farbesiceras
- Farnhamia
- Fascipericyclus
- Favrella
- Fayettevillea
- Fehlmannites
- Ferganoceras
- Ficheuria
- Fikaites
- Finiclymenia
- FissilobicerasFissilobicerasFissilobiceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Flabellisphinctes
- Flemingites
- Flexiclymenia
- Flexispinites
- Flexoptychites
- Flickia
- Fontanelliceras
- FontannesiaFontannesiaFontannesia is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Fontannesiella
- Foordites
- Forbescieras
- ForresteriaForresteriaForresteria is an extinct genus of cephalopod belonging to the Ammonite subclass. They flourished during the late Turonian and early Coniacian ages, and were global in extent...
- FournierellaFournierellaFournierella is an extinct genus of cephalopod belonging to the Ammonite subclass....
- FrankitesFrankitesFrankites is an extinct genus of cephalopod from the Triassic period included in the Trachyceratidae, a family of mostly evolute ammonites, coiled so as all whorls are showing, and commonly ornamented with felxious, tuburculate ribs...
- FrechiellaFrechiellaFrechiella is an ammonite with a smooth, somewhat globose involute shell that lived during the later part of the Early Jurassic, which has been found in England and Italy. The shell is coiled so that the outer whorls cover most of the inner, leaving the inner whorls only slightly exposed...
- FrechitesFrechitesFrechites is an early Triassic ammonite, a kind of cephalopod with an external shell, included in the ceratitid family Beyrichitidae.-Taxonomic revision:...
- FrenguellicerasFrenguellicerasFrenguelliceras is an extinct molluscan genus belonging to the cephalopod subclass Ammonoidea.-References:*...
- FresvilliaFresvilliaFresvillia is an extinct molluscan genus belonging to baculitid family of the cephalopod order Ancyloceratida that lived during the Late Cretaceous, found in France. Baculitids are a kind of heteromorph ammonite characterized by a straight adult shaft preceded by a small coiled juvenile...
- FrogdenitesFrogdenitesFrogdenites is an extinct ammonite genus from the order Ammonitida that lived during the Middle Jurassic in what is now Europe, Canada, and Tibet...
- FucinicerasFucinicerasFuciniceras is an extinct cephalopod genus belonging to the ammonoid subclass, included in the ammonite family Hildoceratidae, that lived during the latter part of the Early Jurassic.-References:*...
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G
- Gabbioceras
- Gabillytes
- Gaetanoceras
- Gagaticeras
- Galaticeras
- Galbanites
- Gangadharites
- GarantianaGarantianaGarantiana is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Gargasiceras
- Garniericeras
- Garnierisphinctes
- Gastrioceras
- Gastroplites
- Gattendorfia
- Gattenpleura
- Gaudryceras
- Gaurites
- Gauthiericeras
- Gazdaganites
- Gemmellaroceras
- Gentoniceras
- Genuclymenia
- Georgioceras
- Germariceras
- Gevanites
- Geyeroceras
- Girtyoceras
- Glabrophysodoceras
- Glamocites
- Glaphyrites
- Glassoceras
- Glatziella
- Glaucolithites
- GlebocerasGlebocerasGleboceras is a genus belonging to Goniatitina suborder. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- GlebosocerasGlebosocerasCoilopoceratidae is a family of generally large, proper ammnites with strongly involute shells from the Upper Cretaceous, Turonian and Coniacian stages. Coilopoceratids have variably compressed shells with flattish to broadly rounded sides and narrowly rounded to sharp keel-like venters. Whorl...
- GlevicerasGlevicerasGleviceras is a psiloceratacean ammonite included in the Lower Jurassic Oxynoticeratidae. Gleviceras is evolute, with a deep umbilicus, and strongly ribbed along the flanks.-References:* Joachim Blau. et al...
- GlochicerasGlochicerasGlochiceras is a haploceratid ammonite characterized by a small, smooth, compressed, evolute shells with large lappets and a median lateral groove...
- GlottoptychinitesGlottoptychinitesGlottoptychinites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- GlyphiditesGlyphiditesGlyphidites is a Late Triassic ceratitid included in the family Thisbitidae, characterized by an essentially involute shell with a compressed whorl section, nearly straight sides and arched venter, bearing a serrated keel and granular sinuous ribs....
- Glyphiolobus
- Glyptarpites
- Glyptoceras
- Glyptoxoceras
- Gnomohalorites
- Gogoceras
- Goliathiceras
- Goliathites
- GoniatitesGoniatitesGoniatites is genus of the Goniatitaceae superfamily. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:* accessed on 10/01/07...
- Gonioclymenia
- Goniocyclus
- Gonioglyphioceras
- Gonioloboceras
- Gonioloboceratoides
- Gonionotites
- Gonolkites
- Goodhallites
- Gracilisphinctes
- Gracilites
- Grambergia
- Grammoceras
- Grandidiericeras
- GraphocerasGraphocerasGraphoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Gravesia
- Grayiceras
- Graysonites
- Gregoryceras
- GriesbachitesGriesbachitesGriesbachites is a Late Triassic ceratitid included in the Haloritidae, with widespread distribution from the Alps through the Himalaya and Timur to British Columbia....
- Groebericeras
- Groenlandites
- Grossouvria
- Grossouvrites
- Guembelites
- GuhsaniaGuhsaniaGuhsania is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Guleilmites
- Guleimiceras
- Gulielmina
- Gunnarites
- Gyaloceras
- GymnitesGymnitesGymnites is a genus of ammonoid cephalopod from the Middle Triassic belonging to the ceratitid family Gymnitidae.-Description:The shell of Gymnites is evolute, generally smooth, with a wide umbilicus. Whorls are moderately embracing, whorl section oval and somewhat compressed. The outer whorl may...
- Gymnodiscoceras
- Gymnoplites
- Gymnotoceras
- Gymnotropites
- Gyroceratites
- Gyroclymenia
- Gyronites
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Ha
- Haidingerites
- Halilucites
- Halorites
- HamitesHamitesHamites is a genus of heteromorph ammonite that evolved late in the Aptian stage of the Early Cretaceous and lasted into the Cenomanian stage of the Late Cretaceous. The genus is almost certainly paraphyletic but remains in wide use as a "catch all" for heteromorph ammonites of the superfamily...
- Hamiticeras
- Hamitoides
- Hammatoceras
- Hammatocyclus
- Hamulina
- Hamulinites
- Hanielites
- Hannaoceras
- Hantkeniceras
- HaplocerasHaplocerasHaploceras is a late Upper Jurassic ammonoid cephalopod and type for the Haploceratidae, similar to Lissoceras but with a broader whorl section and small blunt lappets and a blunt rostrum; some species with feeble ventral folds on body chamber...
- Haplophylloceras
- HaplopleurocerasHaplopleurocerasHaplopleuroceras is a Middle Jurassic ammonite and likely member of the Hildoceratacean family Sonniniidae with which it shares the same sort of ribbing....
- Haploscaphites
- Haresiceras
- Harpoceras
- Harpoceratoides
- Harpohildoceras
- Harpophylloceras
- Hatchericeras
- Hauericeras
- Hauerites
- Haugia
- HebetoxyitesHebetoxyitesHebetoxyites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- HecticocerasHecticocerasHecticoceras is an ammonite genus belonging to the haploceratacean family Oppeliidae, that lived during the Middle and Late Jurassic, from the early Callovian to the early Oxfordian. Hecticoceras may be seen as a series of some nine subgenera, beginning with the lower Callovian H. and H. and...
- Hectioceras
- HectioceratoidesHecticocerasHecticoceras is an ammonite genus belonging to the haploceratacean family Oppeliidae, that lived during the Middle and Late Jurassic, from the early Callovian to the early Oxfordian. Hecticoceras may be seen as a series of some nine subgenera, beginning with the lower Callovian H. and H. and...
- Hectoroceras
- Hedenstroemia
- Heinzia
- Helicancylus
- Helicocyclus
- Helictites
- Hemiaspenites
- Hemibaculites
- Hemigarantia
- Hemihaploceras
- Hemihoplites
- Hemilecanites
- Hemilytoceras
- Hemiptychoceras
- Hemisimoceras
- Hemitetragonites
- Hemitissotia
- Hengestites
- Heraclites
- Hertleinites
- Herznachites
- HeterocerasHeterocerasHeteroceras is a Lower Cretaceous heteromorph ammonite belonging to the ancyloceratacian family, Heteroceratidae, characterized by a helically coiled juvenile shell at the apex followed by slightly curved adult shaft, with a J-shaped section at the end of it...
- Heterotissotia
- Hexaclymenia
- Hibernicoceras
- Hildaites
- HildocerasHildocerasHildoceras is a genus of ammonite form the upper Lower Jurassic in the ammonitid family Hildoceratidae characterized by a narrow discoidal evolute shell, keeled venter, concave ribs along the outer flanks, and a shallow spiral goove running along smooth inner flanks. Whorls slightly overlap,...
- Hildoceratoides
- Hildoglochiceras
- Himalayites
- Himantoceras
- Himavatites
- Himispiticeras
- HlawicerasHlawicerasHlawiceras is an extinct genus from a well known subclass of fossil cephalopods known informally as ammonites that lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Hodsonites
- Hoeninghausia
- Hoepenites
- Hoffmannia
- Holcodiscoides
- Holcodiscus
- Holcolissoceras
- Holcophylloceras
- Holcolytoceras
- Holcoptychites
- Hollandites
- Holzapfeloceras
- Holzbergia
- HomeritesHomeritesFor history see Himyarite KingdomHomerites is a small, involute, globase fossil ceratitid with an eccentric outer whorl and subammonitic sutures belonging to the family Halortidae The body chamber has a slight central keel and radial dichotomous ribs that commonly terminate at spines on the ventral...
- Homoceras
- Homoceratoides
- Homoeoplanulites
- Hoplikosmokas
- HoplitesHoplites (ammonite)Hoplites are a genus of ammonite from the Early Cretaceous period. Its fossils have been found in Europe.-External links:* in the Paleobiology Database...
- Hoplitoides
- Hoplitoplacenticeras
- Hoplocardioceras
- Hoplocrioceras
- HoploscaphitesHoploscaphitesHoploscaphites is an extinct genus of ammonite....
- Hoplotropites
- Horioceras
- Hourcquia
- Hubertoceras
- Hudlestonia
- Hudsonoceras
- Huishuites
- Hulenites
- Hunanites
- Hungarites
- Hyattites
- Hyattoceras
- Hybonoticeras
- Hypacanthoplites
- Hyparpadites
- Hypengonoceras
- Hyperderoceras
- Hypergoniatites
- HyperliocerasHyperliocerasHyperlioceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Hyphantoceras
- Hyphoplites
- Hypisculites
- Hypocladiscites
- Hypophylloceras
- Hypoturrilites
- Hypoxynoticeras
- Hyrcanites
- Hysteroceras
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I
- Iberites
- Idanoceras
- Idiocycloceras
- Idiohamites
- IdocerasIdocerasIdoceras is a genus of perisphictacean ammonite, belonging to the Perisphinctidae subfamily Idoceratinae. The genus is known from the Upper Jurassic, with a widespread distribution. Shells of Idoceras are evolute, with a wide umbilicus; ribbing strong, bifurcate high on flanks. Suture simpler...
- Ilowaiskya
- Imitoceras
- Imlayiceras
- Inaigymnites
- Indigirites
- Indigirophyllites
- Indoceltites
- IndocephalitesIndocephalitesIndocephalites is a true ammonite and a possible subgenus of Macrocephalites, belonging to the stephanoceratacean family, Macrocephalitidae. Inner whorls form a cadicone , outer become more compressed and smoother. Ribs are simple, crossing the venter straight and uninterrupted...
- Indoceras
- Indojuvavites
- Indonesites
- Indoscaphites
- Indosphinctes
- Iniskinites
- Intoceras
- Intornites
- Intranodites
- InvoluticerasInvoluticerasInvoluticeras: a perisphinctacean ammonite belonging to the Aulacostephanininae from the Upper Jurassic of Europe and possibly Mexico. Shell involute, moderately compressed,venter rounded, ribbed. Similar in general form to Aulacostephanus and Epicephalites----Treatise on Invertebrate Paleontology,...
- Inyoites
- Inzeroceras
- Iranoceras
- Irinoceras
- Isculites
- Isculitoides
- Ismidites
- Isohomoceras
- Isohoplites
- Isterites
- Istreites
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J
- Jacobites
- Janenschites
- Japonites
- Jauberticeras
- Jeanneticeras
- Jeanvogericeras
- JeletzkytesJeletzkytesJeletzkytes is an extinct genus of ammonite....
- Jellinekites
- Jimboiceras
- Jimenites
- Joannites
- Jouaniceras
- Jovites
- Juddiceras
- Judicarites
- Juraphyllites
- Juresanites
- Juvavites
- Juvenites
K
- KabylitesKabylitesKabylites is a narrow, straight shelled Lower Cretaceous ancyloceratid resembling Bochianites in general form. Kabylites differs from Bochianites in having an umbilical lobe more or less the same size as the first lateral lobe...
- KachpuritesKachpuritesKachpurites is an uppermost Jurassic ammonite included in the perisphincacean family, Craspeditidae; although some classifiers put the Craspeditidae a subfamily in the Polyptychitidae...
- Kalloclymenia
- KamerunocerasKamerunocerasKamerunoceras is an extinct genus of cephalopod belonging to the Ammonite subclass and Acanthoceratidae family.-References:*Arkell et al, 1957, Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology Part L. Geological Soc. of America, Univ of Kansas Press. R.C. Moore, *W. A. Cobben and Hook,...
- KammerkarocerasKammerkarocerasKammerkaroceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- Kamptoclymenia
- Kamptokephalites
- Karaclymenia
- KaragandocerasKaragandocerasKaragandoceras is an ammonoid genus belonging to the goniatid family Karagandoceratidae that lived during the early Mississippian .Karagandoceras has an involute, lenticular shell, with an acute ventral margin...
- KaramaicerasKaramaicerasKaramaiceras is an extinct cephalopod genus belonging to the Ammonoidea that lived during the Early Cretaceous. Its shell is involute, smooth and rather compressed, with the outer whorl strongly embracing the inner whorls. Sides are flattish to slightly convex and slope inwardly toward a narrowly...
- KaramaitesKaramaitesKaramites is an extinct cephalopoda genus belonging to the Ammonoidea and included in the hoplitacean family Placenticeratidae.Karamites lived during the latest Albian , derived from Semenoviceras. It is the typical form for Central Asia where it occurs with members of the Hoplitidae, e.g....
- KarangatitesKarangatitesKarangatites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- KarapaditesKarapaditesKarapadites is an extinct ammonoid genus belonging to the desmoceratacean family Kossmaticeratidae and considered by some to be a subgenus of Kossmaticeras....
- Karaschiceras
- Kardailites
- Karlwaageites
- Karsteniceras
- Kashmirites
- Katacanites
- Katroliceras
- Katrolites
- Kayutoceras
- Kazakhoceras
- Kazakhoclymenia
- Kazakhstania
- Kazakhstanites
- Kazanskyella
- Kellawaysites
- Kellnerites
- Kelteroceras
- Kenseyoceras
- KeppleritesKeppleritesKepplerites is a moderately evolute ammonite from the lower Callovian included in the Stephanocerataceae.Inner whorls are finely ribbed and have a flattened or grooved venter, the outer whorl has a rounded venter with smooth ribs that cross from side to side without interruption.Kepplerites is...
- Kerberites
- Keyserlingites
- Kheraiceras
- KheraitesHecticocerasHecticoceras is an ammonite genus belonging to the haploceratacean family Oppeliidae, that lived during the Middle and Late Jurassic, from the early Callovian to the early Oxfordian. Hecticoceras may be seen as a series of some nine subgenera, beginning with the lower Callovian H. and H. and...
- Khvalynites
- Kiaclymenia
- Kielcensia
- Kilianella
- Kimoceras
- Kingites
- KingocerasKingocerasKingoceras is a genus in the ammonoid order Ceratitida and family Paraceltitidae which lived during the Late Permian from about 265 to about 254 million years ago. The shell is thinly lenticular, sutures are goniatitic and have only eight fully distinct lobes.Two species are recognized...
- Kinkeliniceras
- Kiparisovia
- Kiparisovites
- Kirsoceras
- Kitchinites
- Klamathites
- Klematosphinctes
- Klipsteinia
- Knemiceras
- Koenenites
- Kohaticeras
- Kokenia
- Koloceras
- Komioceras
- Koninckites
- Korythoceras
- KosmermocerasKosmermocerasKosmermoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- KosmocerasKosmocerasKosmoceras is a moderately evolute ammonite genus from the upper Callovian of Europe with a simple apterure and irregular ribbing interrupted by an irregular row of lateral tubercles...
- Kosmoclymenia
- Kossmatella
- Kossmatia
- Kossmaticeras
- Kozhimites
- Krafftoceras
- Kranaosphinctes
- Krumbeckia
- Kufengoceras
- KumatostephanusKumatostephanusKumatostephanus is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago. It was slow moving and likely to fall victim to large pedators such as Liopleurodon, or small mosasaurs....
- Kurnubiella
- Kushanites
- Kutatissites
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L
- Labeceras
- Laboceras
- LabyrinthocerasLabyrinthocerasLabyrinthoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Laganoclymenia
- Lagowites
- Lambericeras
- Lanceolites
- Lanceoloboceras
- Laqueoceras
- Latanarcestes
- Latisageceras
- Laugeites
- LecanitesLecanitesLecanites is a ceratitid genus assigned to the Danubitaceae, with an essentially smooth, evolote, discoidal shell and a goniatitic suture with many elements. It is the type and now only genus of the Lecanitidae....
- Lechites
- Lecointriceras
- Leconteiceras
- Leconteites
- Leeites
- Lehmaniceras
- Leioceras
- Leiophyllites
- Leislingites
- Lemuroceras
- Lenotropites
- Lenticeras
- Lenticoceltites
- LeopoldiaLeopoldiaLeopoldia is a genus of bulbous perennials in the family Asparagaceae, subfamily Scilloideae. They were formerly included in the genus Muscari , and like them are often called Grape Hyacinths...
- Leptaleoceras
- Leptechioceras
- Lepthoplites
- Leptoceras
- Leptonotoceras
- LeptosphinctesLeptosphinctesLeptosphinctes is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Leptotetragonites
- Leukadiella
- Lewesiceras
- Lewyites
- Leymeriella
- Liardites
- Libycoceras
- Lilloetia
- Limaites
- Linguaclymenia
- Linguatornoceras
- Lingyunites
- Lioceratoides
- Liosphinctes
- Liparoceras
- Lipuites
- LissocerasLissocerasLissoceras is an involute, smooth or finely vetrolaterally ribbed, ammonite with a blunt, un-keeled venter, included in the Haploceratidae, that lived from the Lower Bajocian - Middle Oxfordian in what is now Europe, south Asia, and southern Alaska.Lissoceratoides, once considered to be a subgenus...
- Lissoceratoides
- Lissoclymenia
- Lissonia
- Lissonites
- Lithacoceras
- Lithacosphinctes
- Lithancylus
- LobitesLobitesLobites is a fossil genus of beetles in the family Buprestidae, containing the following species:* Lobites granulatus Tillyard & Dunstan, 1923* Lobites trivittatus Tillyard & Dunstan, 1923* Lobites tuberculatus Tillyard & Dunstan, 1923...
- Lobobactrites
- Lobokosmokeras
- Lobolytoceras
- Lobosphinctes
- Lobotornoceras
- Loczyceras
- Lomonossovella
- Longaeviceras
- Longobardites
- Longobarditoides
- Lopholobites
- Lorioloceras
- Lotzeites
- Ludwigia
- LunulocerasHecticocerasHecticoceras is an ammonite genus belonging to the haploceratacean family Oppeliidae, that lived during the Middle and Late Jurassic, from the early Callovian to the early Oxfordian. Hecticoceras may be seen as a series of some nine subgenera, beginning with the lower Callovian H. and H. and...
- LupheritesLupheritesLupherites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Luppovella
- Lusitanites
- Lycetticeras
- Lyelliceras
- LyrogoniatitesLyrogoniatitesLyrogoniatitites is a neoglyphiocercean ammonite, in the order Goniatitida, related to genera like Alaoceras, Cravenoceras, Dumbarigloria and Pachylyroceras.-Description:...
- Lytheoceras
- Lyticoceras
- Lytoceras
- Lytocrioceras
- Lytodiscoides
- Lytogyroceras
- Lytohoplites
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Ma
- MacrocephalitesMacrocephalitesMacrocephalites is a genus of the stephanoceratacean ammonite family Macrocephalitidae, diagnostic of the Callovian stage of the Middle Jurassic...
- Macroscaphites
- Madagascarites
- Maenioceras
- MagharinaMagharinaMagharina is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Malayites
- Malladaites
- Malletophychites
- Maltoniceras
- MammitesMammitesMammites is an Upper Cretaceous ammonite belonging to the acanthoceratacean family, Acanthoceratidae, and is the type genus for the subfamily Mammitinae. It was named by Laube and Bruder in 1887. It range is Lower to Upper Turonian....
- Manambolites
- Mancosiceras
- Mangeroceras
- Manoloviceras
- Mantelliceras
- Manticoceras
- Manuaniceras
- Maorites
- Mapesites
- Marathonites
- Margaritropites
- Marianoceras
- MariellaMariellaMariella is an ammonoid genus, named by Nowak from the upper Albian and Cenomanian stages of the mid Cretaceous, included in the Turrilitidae. Its type is Turrilites bergeri-References:*...
- Marshallites
- Martolites
- Masiaposites
- Masonites
- Maternoceras
- Mathoceras
- Mathoceratites
- Maximites
- Mayaites
- Mazapilites
Me
- MedlicottiaMedlicottiinaeThe Medlicottiinae a subfamily of the Medlicottiidae, a family of ammonoid cephalopods included in the Prolecanitida, characterized by having discoidal to thinly lenticular shells with a retuse venter and sutures with bifid auxiliary lobes....
- Meekoceras
- Megalytoceras
- Megaphyllites
- Megapronorites
- MegasphaerocerasMegasphaerocerasMegasphaeroceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted approximately 200 to 145 million years ago....
- Megatyloceras
- Meginoceras
- Melagathiceras
- Melchiorites
- MelonitesRaymondiceratinaeRaymondiceratinae is a subfamily of Upper Devonian cheiloceratid goniatites in which the sutures have 4 distinct lobes and the growth lines are convex. The subfamily includes three genera....
Me (cont.)
- Melvilloceras
- Menabites
- Menabonites
- Meneghiniceras
- MenuitesMenuitesMenuites is a rather small offshoot of Anapachydiscus with a fairly widespread distribution from the Upper Cretaceous Santonian and Campanian stages....
- Menuthiocrioceras
- Mercaticeras
- Merocanites
- Mescalites
- Mesobeloceras
- Mesocladiscites
- Mesoclymenia
- Mesogaudryceras
- Mesopuzosia
- Mesosimoceras
- Mesoturrilites
- Metacanites
- Metacarnites
- Metacymbites
- Metadagnoceras
- Metaderoceras
- Metadimorphoceras
- Metadinarites
- Metagravesia
- Metahamites
- Metahaploceras
- Metahedenstroemia
- Metahoplites
- Metalegoceras
- Metalytoceras
- Metapatoceras
- Metapeltoceras
- Metaplacenticeras
- Metapronorites
- Metaptychoceras
- Metarnioceras
- Metasibirites
- Metasigaloceras
- Metassuria
- Metatibetites
- Metatissotia
- Metengonoceras
- Metinyoites
- Metoicoceras
- Metoxynoticeras
- MetrolytocerasMetrolytocerasMetrolytoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Metussuria
- Mexicoceras
Mi
- Miccocephalites
- Michalskia
- MichiganitesMichiganitesMichiganites is a member of the ammonoid order Prolecanitida, named by Ruzhencev in 1962, which comes from the Visean stage of the Carboniferous...
- Micracanthoceras
- Microbactrites
- Microbiplices
- Microdactylites
- MicroderocerasMicroderocerasMicroderoceras is a flat sided, evolute, radially ribbed Lower Jurassic ammonite belonging to the ammonitid family Eoderoceratidae and superfamily Eoderocerataceae...
- Micromphalites
- Microtropites
- Miklukhoceras
- Miltites
- MimagoniatitesMimagoniatitesMimagoniatites is an extinct genus of ammonite from the Devonian.-References:* Dinosaurs to Dodos: An Encyclopedia of Extinct Animals by Don Lessem and Jan Sovak...
- Mimimitoceras
- Mimosphinctes
- Mirilentia
- Miroclymenia
- Mirojuvavites
- Mirosphinctes
- Mitonia
- Mixomanticoceras
- Miyakoceras
Mo
- Moffitites
- Mojsisovicsites
- Mojsisoviczia
- Mojsvarites
- Monacanthites
- Mongoloceras
- Monophyllites
- Moremanoceras
- Morphoceras
- Morrisiceras
- MorrowitesMorrowitesMorrowites, named by Cobban and Hook, 1983, is described in Memoir 41 NMBM&MR as a moderate to large-sized ammonite with quadrangular to depressed whorls, broadly rounded to depressed venter, low ribs, umbilical and inner and outer ventrolateral tubercles and smooth early whorls except for...
- MortonicerasMortonicerasMortoniceras is an ammonoid genus belonging to the superfamily Acanthocerataceae, named by Meek in 1876, based on Ammonites vespertinu, named by Morton in 1834....
- Moutoniceras
Mu
- Mucrodactylites
- Muensterites
- Muensteroceras
- Muniericeras
My
- Myloceras
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Na
- Nairites
- NannitesNannitesNannites is a genus in the ammonoid cephalopod order Ceratitida from the middle and upper Triassic of the Alps, named by Mojsisovics . Nannties is the type genus of the Nannitidae which has been placed in the Danubitaceae...
- Nannocardioceras
- NannolytocerasNannolytocerasNannolytoceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Nannostephanus
- Nannovascoceras
- Nassichukites
- Nathorstites
- Nautellipsites
Ne
- Neancyloceras
- 'Nebraskites
- Nebrodites
- Negebites
- Nejdia
- NeoaganidesNeoaganidesNeoaganides is a small, 1–2 cm diameter subdiscoidal to subglobular goniatitid belonging to the family Pseudohaloritidae that lived from the Late Pennsylvanian to the Late Permian, existing for some 56 million years....
- Neobibolites
- Neocardioceras
- Neochetoceras
- Neocladiscites
- Neoclypites
- Neocolumbites
- Neocomites
- Neocosmoceras
- Neocraspedites
- Neocrimites
- Neocrioceras
- Neodimorphoceras
- Neogastroplites
- Neogauthiericeras
- NeogeocerasMedlicottiinaeThe Medlicottiinae a subfamily of the Medlicottiidae, a family of ammonoid cephalopods included in the Prolecanitida, characterized by having discoidal to thinly lenticular shells with a retuse venter and sutures with bifid auxiliary lobes....
- NeoglaphyritesBisatoceratidaeBisatoceratidae is one of two families of the Goniatitina suborder. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- Neoglyphioceras
- Neoglytoxoceras
Ne (cont.)
- Neogoniatites
- Neograhamites
- Neoharpoceras
- Neohimavatites
- Neohoploceras
- Neoicoceras
- Neokentoceras
- Neolioceratoides
- NeolissocerasNeolissocerasNeolissoceras is a haploceratid ammonite with a smooth, compressed, flat-sided shell with a flatly rounded venter and distinct umbilical margin, from the Upper Jurassic - Lower Cretaceous of southern Europe, Madagascar, and India.-References:Arkell et al, 1957 Mesozoic Ammonoidea, Treatise on...
- Neolobites
- Neomantelliceras
- Neomanticoceras
- Neomicroceras
- Neomorphoceras
- Neopericyclus
- Neopharciceras
- Neophlycticeras
- Neophylloceras
- Neopopanoceras
- Neopronorites
- Neoprotrachyceras
- NeoptychitesNeoptychitesNeoptychites is an extinct ammonoid cephalopod genus from the Turonian stage of the Upper Cretaceous, with a world wide distribution.-Description:...
- Neopulchellia
- Neosaynoceras
- Neoselwynoceras
- Neoshumardites
- Neosilesites
- Neosirenites
- Neostlingoceras
- Neotibetites
- NeouddenitesUddenitinaeThe Uddenitinae a subfamily of the Medlicottiidae, a family of ammonoid cephalopods included in the Prolecanitida.The Uddenitinae, proposed by Miller and Furnish, and known from the Pennsylvanian and Lower Permian, are transistional between the ancestral Pronoritidae and the more more traditional...
- Neuqueniceras
- Nevadisculites
- Nevadites
- Nevadoceras
- Nevadophyllites
- Newboldiceras
- NewmarracarrocerasNewmarracarrocerasNewmarracarroceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
Ni
- Niceforoceras
- Nicklesia
- Nicomedites
- NielsenocerasNielsenocerasNielsenoceras is a Paraceltitid genus of from the lower Upper Permian, known from sediments in west Texas. The genus is distinguished by exceptionally broad prongs of the ventral lobe and by the presence of a shallow groove on the outer flanks....
- Nigericeras
- NipponitesNipponitesNipponites is an extinct genus of heteromorph ammonites. The species of Nipponites are famous for the way their shells form "ox-bow" bends, resulting in some of the most bizarre shapes ever seen among ammonites.The ecology of Nipponites, as with many other nostoceratids, is subject to much...
- Nitanoceras
No
- Nodiocoeloceras
- Nodosageceras
- Nodosoclymenia
- Nodosohoplites
- Nodotibetites
- Noetlingites
- Nolaniceras
- Nomismoceras
- Nordiceras
- Nordophiceras
- Noridiscites
- Norites
- NormannitesNormannitesNormannites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- NostocerasNostocerasNostoceras is an extinct genus of ammonite from the Nostoceratidae family....
- Nothocephalites
- Nothosporadoceras
- Nothostephanus
- Notoceras
- Nowakites
Nu
- Nuculoceras
- Nummoceras
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 |
O
- Obrutchevites
- Obtusicostites
- Ochetoceras
- Ochotoceras
- Odontodiscoceras
- OecoptychiusOecoptychiusOecoptychius is an extinct genus from a well known subclass of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- OecotraustesOecotraustesOecotraustes is an extinct genus from a well known subclass of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Oiophyllites
- Oistoceras
- OkribitesOkribitesOkribites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Olcostephanus
- Olenekoceras
- Olenikites
- Onitshoceras
- Onychoceras
- Oosterella
- Ophiceras
- Ophilyroceras
- OppeliaOppeliaOppelia is a haploceratcean ammonite and type genus for the Oppeliidae that lived during the Middle Jurassic between 170 and 164 million years ago. Shells of Oppelia are involute with a small to moderate size umbilicus, bluntly rounded to sharp venter, and deeply impressed dorsum. Sides are...
- Oraniceras
- Orestites
- Organoceras
- Orionoides
- Ornatoclymenia
- Orthaspidoceras
- Orthildaites
- Orthoceltites
- OrthogarantianaOrthogarantianaOrthogarantiana is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Orthosphinctes
- Orulganites
- Ostlingoceras
- Otoceltites
- Otoceras
- Otohoplites
- OtoitesOtoitesOtoites is the type genus of the ammonite family Otoitidae that live during the early part of the Middle Jurassic epoch.The Otoitidae, which is part of the superfamily Stephanocerataceae, are part of the well known subclass of prehistoric cephalopods known in general terms as ammonitesOtoites is...
- Otoscaphites
- Ovaticeras
- Owenites
- Owenoceras
- Oxintoceras
- Oxybeloceras
- OxyceritesOxyceritesOxycerites is an extinct ammonoid cephalopod belonging to the haploceratacean family, Oppeliidae, that lived during the middle of the Jurassic Period, between 164 and 160 million years ago...
- Oxydiscites
- Oxylenticeras
- OxynoticerasOxynoticerasOxynoticeras is an extinct genus of ammonite from the Early Jurassic of Europe and North America.-External links:* in the Paleobiology Database...
- Oxyparoniceras
- Oxytornoceras
- Oxytropidoceras
 |
Pa
- Pachycardioceras
- Pachyceras
- Pachyclymenia
- Pachydesmoceras
- Pachydiscoides
- PachydiscusPachydiscusPachydiscus is an extinct ammonite genus from the Upper Cretaceous with a world-wide distribution, and type for the desmoceratacean family Pachydiscidae. Its type is P. neubergicus. Altogether some 28 species have been described....
- Pachyerymnoceras
- PachylyrocerasPachylyrocerasPachylyroceras is a large, generally subglobular, Upper Mississippian gonitite and included in the cephalopod subclass Ammonoidea.-Recognition:...
- Pachylytoceras
- Pachypictonia
- Pachysphinctes
- Padagrosites
- PadragosicerasPadragosicerasPadragosiceras is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Palaeogoniatites
- Palaeokazachstanites
- Palaeophyllites
- Palermites
- Palicites
- Palnerostephanus
- Paltaopites
- Paltechioceras
- Pamphagosirenites
- Paprothites
- Paquiericeras
- Paraacrochordiceras
- Parabactrites
- Parabehavites
- Paraberriasella
- Parabevalites
- Paraboliceras
- Paraboliceratoides
- Paracadoceras
- Paracalycoceras
- Paracanthoplites
- ParaceltitesParaceltitesParaceltites is an ammonoid cephalopod genus in the ceratitid family Paraceltitidae, known from the Middle and Upper Permian of Sicily, the Alps, Crimea, Texas and Mexico. The shell of Paraceltities is evolute with whorls compressed, venter arched and smooth, sides bearing ribs that slant somewhat...
- Paraceratites
- Paraceratitoides
- Paracladiscites
- Paraconlinoceras
- Paracorniceras
- Paracraspedites
- Paracravenoceras
- Paracrioceras
- Paracuariceras
- Paracymbites
- Paradanubites
- Paradasyceras
- Paradicidia
- Paradimeroceras
- Paradimorphoceras
- Paradinarites
- Paradistichites
- Paradolphia
- Paraganides
- Paragastrioceras
- Paragattendorfia
- Paragoceras
- Paraguembelites
- Paragymnites
- Parahauerites
- Parahildaites
- Parahomoceras
- Parahoplites
- Parajaubertella
- Parajuvavites
- Parakellnerites
- Paralcidia
- Paralenticeras
- Paralobites
- Paralytoceras
- Paramammites
- Parammatoceras
- Paranannites
- Paranclyoceras
- Parandiceras
- Paranorites
- Paranoritoides
- Parapallasiceras
- Parapatoceras
- Parapeltoceras
- Paraperrinites
- Paraphyllites
- Parapinacoceras
- Paraplacites
- Parapopanoceras
- Parapronorites
- ParapuzosiaParapuzosiaParapuzosia is an extinct genus of Desmoceratid ammonites. The best known species is Parapuzosia seppenradensis.-Species:*Parapuzosia seppenradensis *Parapuzosia bradyi -References:...
- Pararasenia
- Pararcestes
- Pararnioceras
- Parasageceras
- Parasaynoceras
- Paraschartymites
- Paraschistoceras
- Parashumardites
- Parasibirites
- Parasilesites
- Parasolenoceras
- Paraspidites
- Paraspidoceras
- Paraspiticeras
- Parastieria
- ParastrenocerasParastrenocerasParastrenoceras is an extinct genus from the ammonoid cephalopod order Ammonitida, included in the family Spiroceratidae that lived during the Bajocian stage of the early Middle Jurassic....
- Parasturia
- Paratexanites
- Parathetidites
- Parathisbites
- Paratibites
- ParatirolitesParatirolitesParatirolites is an Early Triassic ceratite from Armenia and Iran with distinct ribs, prominent ventro-lateral tubercles, and a broadly arched venter. The suture is ceratitic with a large ventral saddle....
- Paratissotia
- Paratorleyoceras
- Paratornoceras
- Paratrachyceras
- Paratropites
- Paraturrilites
- Paravirgatites
- Parawedekindia
- Parawocklumeria
- Parayakutoceras
- Parengonoceras
- Parentites
- Parinodiceras
- Parkinsonia
- Parodiceras
- Parodontoceras
- Paroecotraustes
- Paroniceras
- Paroxynoticeras
- Partschiceras
- Parussuria
- Paryphoceras
- Pascoeites
- Paskentites
- Passendorferia
- Patagiosites
- Paulotropites
- PavloviaPavloviaPavlovia is an extinct genus of ammonite from the Late Jurassic to the Early Cretaceous of Europe.-Sources:* Fossils by David Ward...
- Pavloviceras
Pe
- Pearylandites
- Pectinatites
- Pedioceras
- PeltocerasPeltocerasPeltoceras is an extinct ammonite genus from the aspidoceratid subfamily Peltoceratinae that lived during the later part of the Middle Jurassic ....
- Peltoceratoides
- Peltolytoceras
- Peltomorphites
- Pennoceras
- Pentagonoceras
- Pericarinoceras
- Pericleites
- Pericyclus
- Peripleurites
- PerisphinctesPerisphinctesPerisphinctes is an extinct genus of ammonite cephalopod. They lived during the Jurassic Period , and serve as an index fossil for that time period....
- Peritrochia
- Pernoceras
Pe (cont.)
- Peroniceras
- Peronoceras
- Perrinites
- Perrinoceras
- Pervinquieria
- PetitclerciaPetitclerciaPetitclercia is a genus of mollusk from the strigoceratid subfamily Disticocratinae which are included in the ammonitid superfamily Haplocerataceae. Petitclercia, named by Rollier, 1909, is found in the upper Middled Jurassic of France....
- Petrolytoceras
- Petteroceras
- Peytonoceras
Ph
- Phaneroceras
- Phanerostephanus
- Pharciceras
- Phaularpites
- PhaulostephanusPhaulostephanusPhaulostephanus is an extinct genus from the ammonoid family Stephanoceratidae, which is part of the ammonitid superfamily Stephanocerataceae, that lived during the early Middle Jurassic....
- Phaulozigzag
- Phillipites
- Phillipsoceras
- Phlycticeras
- Phlycticrioceras
- Phlyseogrammocera
- Phoenixites
- Phormedites
- Phricodoceras
- PhyllocerasPhyllocerasPhylloceras is an extinct genus of ammonite....
- Phyllocladiscites
- Phyllopachyceras
- Phylloptychoceras
- Phyllytoceras
- Phymatoceras
- Physematites
- Physeogrammoceras
- Physodoceras
Pi
- Pictetia
- Pictonia
- Pimelites
- Pinaclymenia
- Pinacoceras
- Pinacoplacites
- Piriclymenia
Pl
- PlacenticerasPlacenticerasPlacenticeras is an ammonite genus from the Late Cretaceous. Its fossils have been found in Asia, Europe, North and South America.-Taxonomy:...
- Placites
- Planammatoceras
- Planisphinctes
- Plasmatoceras
- Platotropites
- Platyclymenia
- Platycuccoceras
- Platygoniatites
- Platylenticeras
- Platynoticeras
- Platypleuroceras
- Playfordites
- Plesiacanthoceras
- Plesiacanthoides
- Plesiohamites
- Plesiospitidiscus
- Plesiotissotia
- Plesioturrilites
- Pleuroacanthites
- PleurocephalitesMacrocephalitesMacrocephalites is a genus of the stephanoceratacean ammonite family Macrocephalitidae, diagnostic of the Callovian stage of the Middle Jurassic...
- PleurocerasPleurocerasPleuroceras is a genus of fungi in the family Gnomoniaceae. The genus was first described by H. Riess in 1854. Several species in the genus are plant pathogens. The genus contains 12 species.- Species :*P. arollanum*P. bottnicum...
- Pleurodistichites
- Pleurohoplites
- Pleurolytoceras
- Pleuronodoceras
- Pleuropinacoceras
- Pleurotexanites
- Pleydellia
- Plictetia
Po
- Poculisphinctes
- PoecilomorphusPoecilomorphusPoecilomorphus is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Polaricyclus
- Politoceras
- Polonites
- Polonoceras
- Polymorphites
- Polyplectites
- Polyplectus
- Polyptychites
- PolyptychocerasPolyptychocerasPolyptychoceras is an extinct genus of ammonite from the Late Cretaceous of Asia, Europe, and North and South America. It was first named by Hisakatsu Yabe in 1927, and contains eight species and a subgenus, Subtychoceras, which contains one species....
- Polysphinctes
- Pomerania
- Pompeckioceras
- Pompeckjites
- Ponteixites
- Ponticeras
- Popanites
- Popanoceras
- Poporites
- Porpoceras
- Postglatziella
- Posttornoceras
Pr
- PraebigotitesPraebigotitesPraebigotites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Praedaraelites
- Praeglyphioceras
- Praemanambolites
- Praemeroceras
- Praemuniericeras
- PraeparkinsoniaPraeparkinsoniaPraeparkinsonia is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Praesphaeroceras
- PraestrigitesPraestrigitesPraestrigites is a genus from the Strigoceratidae which is included in the ammonitid superfamily, Haplocerataceae.Praestrigites comes from the lower Middle Jurassic and has been found in England, Germany, Switzerland, and Oregon....
- Praetollia
- PravitocerasPravitocerasPravitoceras is an extinct genus of ammonite....
- Preflorianites
- Preflorianitoides
- Prenkites
- Preshumardites
- Presimoceras
- Pricella
- Prionites
- Prionoceras
- Prionocycloceras
- Prionocyclus
- Prionodoceras
- Proarcestes
- Proavites
- Probeloceras
- Procarnites
- ProceritesProceritesProcerites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Procerozigzag
- Procheloniceras
- Prochorites
- Procladiscites
- Procliviceras
- Procolumbites
- Procraspedites
- Prodactylioceras
- Prodeshayesites
- Prodromites
- Progalbanites
- Progeronia
- Progonoceratites
- Progonioclymenia
- Prograyiceras
- Proharpoceras
- Prohauericeras
- Prohecticoceras
- Prohelicoceras
- Prohungarites
- Prohysteroceras
- Projuvavites
- Prolecanites
- Proleopoldia
- Proleymeriella
- Prolobites
- Prolyelliceras
- Promantelliceras
- PromicrocerasPromicrocerasPromicroceras is an extinct ammonite genus from the upper Sinemurian of Europe, named by Leonard Spath in 1925. Promicroceras is included in the family Eoderoceratidae, which is part of the ammonitid superfamily Eoderocerataceae. The type is P...
- Proniceras
Pr (cont.)
- Pronoetlingites
- Pronorites
- Propectinatites
- Properisphinctes
- Properrinites
- Propinacoceras
- Proplacenticeras
- Proplanulites
- Propopanoceras
- Proptychites
- Proptychitoides
- Prorasenia
- ProrsisphinctesProrsisphinctesProrsisphinctes is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Prosaphites
- Proshumardites
- Prosiceras
- Prososphinctes
- Prososphinctoides
- Prosphingites
- Prostacheoceras
- Protacanthoceras
- Protacanthodiscus
- Protacanthoplites
- ProtaconecerasProtaconecerasProtaconeceras is a deeply umbliciate, involute haploceratacean ammonite from the Lower Cretaceous included in the oppeliid subfamily Aconeceratinae....
- Protactoclymenia
- Protanclyoceras
- Protanisoceras
- Protengonoceras
- Protetragonites
- Proteusites
- Protexanites
- Prothalassoceras
- Protimanites
- Protocanites
- Protoceras
- ProtoecotrausitesProtoecotrausitesProtoecotrausites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Protogrammoceras
- Protohoplites
- Protophites
- Protoplatytes
- Protopopanoceras
- Protornoceras
- Protosageceras
- Protothurmannia
- Prototoceras
- Protoxyclymenia
- Protrachyceras
- Protropites
- Proturrilitoides
- ProuddenitesUddenitinaeThe Uddenitinae a subfamily of the Medlicottiidae, a family of ammonoid cephalopods included in the Prolecanitida.The Uddenitinae, proposed by Miller and Furnish, and known from the Pennsylvanian and Lower Permian, are transistional between the ancestral Pronoritidae and the more more traditional...
Ps
- Pseudacompsoceras
- Pseudaetomoceras
- Pseudagathiceras
- Pseudammatoceras
- Pseudargentiniceras
- Pseudarietites
- Pseudarisphinctes
- Pseudaspidites
- Pseudaspidoceras
- Pseudharpoceras
- Pseudhelicoceras
- Pseudhimalayites
- Pseudinvoluticeras
- Pseudoaganides
- Pseudoaspidoceras
- Pseudobactrites
- Pseudobaculites
- Pseudobarroisiceras
- PseudobrightiaHecticocerasHecticoceras is an ammonite genus belonging to the haploceratacean family Oppeliidae, that lived during the Middle and Late Jurassic, from the early Callovian to the early Oxfordian. Hecticoceras may be seen as a series of some nine subgenera, beginning with the lower Callovian H. and H. and...
- Pseudocadoceras
- Pseudocalycoceras
- Pseudocardioceras
- Pseudocarnites
- Pseudoceltites
- Pseudoclambites
- Pseudoclymenia
- Pseudocosmoceras
- Pseudodanubites
- Pseudofavrella
- Pseudoflemingites
- Pseudofoordites
- PseudogarantianaPseudogarantianaPseudogarantiana is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Pseudogarnieria
- Pseudogastrioceras
- Pseudoglaphyrites
- Pseudogrammoceras
- Pseudogregoryceras
- Pseudohalorites
- Pseudohaploceras
- Pseudoinvoluticeras
- Pseudojacobites
- Pseudokatroliceras
- Pseudokossmaticeras
- Pseudokymatites
- Pseudoleymeriella
- Pseudolillia
- Pseudolioceras
- Pseudolissoceras
- Pseudomercaticeras
- Pseudoneoptychites
- Pseudonomismoceras
- Pseudoosterella
- Pseudoparalegoceras
- Pseudopeltoceras
- Pseudoperisphinctes
- Pseudophyllites
- Pseudoplacenticeras
- Pseudopolyplectus
- Pseudoppelia
- Pseudoprobeloceras
- Pseudopronorites
- Pseudopuzosia
- Pseudosageceras
- Pseudosaynella
- Pseudoschistoceras
- Pseudoschloenbachia
- Pseudosimoceras
- PseudosirenitesPseudosirenitesPseudosirenites is an Upper Triassic ammonite belonging to the ceratitid family Trachyceratidae, like Sirenites, but with a narrow outer rim that has a nodose keel on either side.-References:...
- Pseudosonneratia
- Pseudothetidites
- Pseudothurmannia
- Pseudotibetites
- Pseudotirolites
- Pseudotissotia
- Pseudotoceras
- PseudotoitesPseudotoitesPseudotoites is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
- Pseudotropites
- Pseudovidrioceras
- Pseudovirgatites
- Pseudowaagenia
- Pseudoxybeloceras
- Pseuduptonia
- PsilocerasPsilocerasPsiloceras is an extinct genus of cephalopod belonging to the ammonite subclass. Psiloceras fossils are commonly found at Lyme Regis, Dorset Coast, England. Here smooth-shelled Psiloceras planorbis are to be found as usually flattened fossils in the Blue Lias....
- Psilocladiscites
- Psilohamites
- Psilophyllites
- Psilosturia
- Psilotissotia
Pt
- Pterolytoceras
- Pteroscaphites
- Pterosirenites
- Ptycharcestes
- Ptychites
- Ptychoceras
- Ptycholytoceras
- Ptychophylloceras
Pu
- Puchenquia
- Puebloites
- Pulchellia
- PutealicerasHecticocerasHecticoceras is an ammonite genus belonging to the haploceratacean family Oppeliidae, that lived during the Middle and Late Jurassic, from the early Callovian to the early Oxfordian. Hecticoceras may be seen as a series of some nine subgenera, beginning with the lower Callovian H. and H. and...
- Puzosia
- Puzosigella
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Q
- Qiannanites
- Quasicravenoceras
- Quasintoceras
- Quenstedtoceras
- Quinnites
- Quitmannites
R
- Radstockiceras
- Raimondiceras
- Rakusites
- Ramosites
- Rasenia
- Rasenoides
- RaymondicerasRaymondiceratinaeRaymondiceratinae is a subfamily of Upper Devonian cheiloceratid goniatites in which the sutures have 4 distinct lobes and the growth lines are convex. The subfamily includes three genera....
- Rectoclymenia
- Reesidites
- Rehmannia
- Reiflingites
- Reineckeia
- Reineckeites
- Renites
- Renziceras
- Repossia
- Reticuloceras
- Retites
- Reynesella
- Reynesoceras
- Reynesocoeloceras
- Rhabdoceras
- Rhacophyllites
- Rhadinites
- Rhaeboceras
- Rhampidoceras
- Rhiphaeoclymenia
- Rhiphaeocyclus
- Rhymmoceras
- Rhytidohoplites
- Riasanites
- Richardsonites
- Rimkinites
- Ringsteadia
- RoinghitesRaymondiceratinaeRaymondiceratinae is a subfamily of Upper Devonian cheiloceratid goniatites in which the sutures have 4 distinct lobes and the growth lines are convex. The subfamily includes three genera....
- Rollerites
- Rollieria
- Roloboceras
- Romaniceras
- Romanites
- Rossalites
- Rotodiscoceras
- Rotopericyclus
- Rubroceras
- Rugiferites
- Rursiceras
- Rusoceras
- Ryugasella
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Sa
- Sageceras
- Sagenites
- Saghalinites
- Sakhaites
- Sakmarites
- Salaziceras
- Salfeldiella
- Saltericeras
- Salterites
- Sandbergeroceras
- Sandlingites
- Sangzhites
- Sanmartinoceras
- Sanyangites
- Sarasinella
- Saxoceras
- Saynella
- Saynoceras
Sc
- Scalarites
- Scaphamites
- ScaphitesScaphitesScaphites is a genus of extinct cephalopod belonging to the family of heteromorph ammonites . They were a widespread genus that thrived during the Cretaceous period....
- Scaphitodites
- Scarburgiceras
- Schartymites
- Schindewolfites
- Schindewolfoceras
- Schistoceras
- Schistophylloceras
- SchloenbachiaSchloenbachiaSchloenbachia is an ammonoid cephalopod genus from the Cenomanian stage of the Upper Cretaceous, and type for the Schloenbachiidae, a family within the ammonitid Hoplitaceae....
- Schlotheimia
- Schuichengoceras
- Schwandorfia
- Sciponoceras
- Schizoclymenia
- Scoticardioceras
Se
- Sellaclymenia
- Sellagoniatites
- Sellanarcestes
- Selwynoceras
- Semenovites
- Semiformiceras
- Semiornites
- Serpianites
- Serramanticoceras
- Seymourites
Sh
- Shakraceras
- Shangraoceras
- Shaoyangoceras
- Sharpeiceras
- Shasticrioceras
- ShastocerasShastocerasShastoceras is an extinct genus of ammonite cephalopod found in Lower Aptian sediments in Northern California.It, like its close relative, Annuloceras, is a heteromorph ammonite that strongly resembles Macroscaphites....
- Shengoceras
- Shikhanites
- Shirbuirnia
- ShouchangocerasShouchangocerasShouchangoceras is pseudohaloritid and type genus for the Shouchangocerinae, characterized by a compressed shell as much as 5 cm in diameter, with a strongly constricted mature peristome that has shallow dorsolateral sinus, a moderately deep rounded ventral sinus, but without conspicuous...
- Shumardites
Si
- Siberiptychites
- Sibirites
- Sibyllites
- Sicanites
- Sicilioceras
- Siculites
- Siemiradzkia
- Sigaloceras
- Silberlingites
- Silenticeras
- Silesites
- Silesitoides
- Simaspidoceras
- Simbirskites
- Simichelloceras
Si (cont.)
- Simmoceras
- Simoceras
- Simocosmoceras
- Simonyceras
- Simosphinctes
- Simotoichites
- Sindeites
- Sinotites
- Sinzovia
- SirenitesSirenitesSirenites is an ammonoid cephalopod from the Upper Triassic included in the Ceratitida, and type for the trachyceratid subfamily Sirenitinae....
- Sirenotrachyceras
- Sivajiceras
- Sizilites
So
- Sobolewia
- Sohlites
- Sokolovites
- Solenoceras
- Solgerites
- SoliclymeniaSoliclymeniaSoliclymenia is a genus of ammonite from the Late Devonian. S. paradoxa has an unusual, triangularly-coiled shell. Additional genera of ammonites with triangular shells are Kamptoclymenia, Trigonoshumardites, and Trigonogastrioceras. Soliclymenia semiparadoxa, which is known only from the...
- Somaliceras
- Somalites
- Somoholites
- Sonneratia
- Sonninia
- Sornayceras
- SosiocerasSosiocerasSosioceras is an Upper Permian shouchangoceratin pseudohaloritid characterized by a subdiscoidal shell, about 2 cm in diameter, marked by growth lines, as with Neoaganides, and having a mature peristome with a double constriction near the perifery...
- Sowerbyceras
Sp
- Spathiceras
- Spathites
- Speetoniceras
- Sphaeroceras
- Sphaerocladiscites
- Sphaerocoeloceras
- Sphaerodomites
- Sphaeromanticoceras
- Sphaeroptychius
- Sphenarpites
- Sphenoclymenia
- SphenodiscusSphenodiscusSphenodiscus is an extinct genus of acanthoceratacean ammonite. The genus has been found from many continents and is thought to have had a large global distribution during the Maastrichtian stage of the Late Cretaceous...
- Sphingites
- Spinammatoceras
- Spinokosmoceras
- Spinoleiophyllites
- Spiroceras
- Spirogmoceras
- Spirolegoceras
- Spiticeras
- Spitidiscus
- Sporadoceras
St
- Stacheites
- Stacheoceras
- Stantonoceras
- Staufenia
- Stegoxyites
- Stehnocephalites
- Steinmannites
- Stemmatoceras
- Stenarcestes
- Stenocadoceras
- Stenoclymenia
- Stenocyclus
- Stenoglaphyrites
- Stenopharciceras
- Stenopopanoceras
- Stenopronorites
- Stephanites
St (cont.)
- StephanocerasStephanocerasStephanoceras is a Stephanoceratacean genus and type for the Stephanoceratidae, which lived during the Bajocian but is now extinct....
- Stikinoceras
- Stoliczkaia
- Stolleites
- Stomohamites
- Stoppaniceras
- Streblites
- Strebliticeras
- Strenoceras
- Striatosirenites
- Strigoceras
- Strigogoniatites
- Strungia
- Sturia
- Styracoceras
- Styrites
Su
- Subalpinites
- Subarcthoplites
- Subastieria
- Subbarroisiceras
- Subbonarellia
- SubcollinaSubcollinaSubcollina is an evolute to serpenticonic stephanoceratacean ammonite from the Middle Jurassic of Mexico, placed in the family Spiroceratidae....
- Subcolumbites
- Subcraspedites
- Subdichotomoceras
- Subgrossouvria
- Subinyoites
- Subitoceras
- Subkossmatia
- Sublithacoceras
- SublunulocerasHecticocerasHecticoceras is an ammonite genus belonging to the haploceratacean family Oppeliidae, that lived during the Middle and Late Jurassic, from the early Callovian to the early Oxfordian. Hecticoceras may be seen as a series of some nine subgenera, beginning with the lower Callovian H. and H. and...
- Submantelliceras
- Submeekoceras
- Submortoniceras
- Subnebrodites
- Subneumayria
- Subolenekites
- Suboosterella
- Subperrinites
- Subplanites
- Subprionocyclus
- Subpulchellia
- Subsaynella
- Subshumardites
- Substeueroceras
- Substreblites
- Subthurmannia
- Subtissotia
- Subvertebriceras
- Subvishnuites
- Sudeticeras
- Sulciferites
- Sulcimitoceras
- Sulcoclymenia
- Sulcodimorphoceras
- Sulcogirtyoceras
- Sulcohamites
- Sulcohamitoides
- Sulcohoplites
- Sundaites
- Sunites
- Surenites
- Sutneria
Sy
- Sympolycyclus
- Synartinskia
- Syngastrioceras
- Synpharciceras
- Synuraloceras
- Synwocklumeria
- SyrdenitesMedlicottiinaeThe Medlicottiinae a subfamily of the Medlicottiidae, a family of ammonoid cephalopods included in the Prolecanitida, characterized by having discoidal to thinly lenticular shells with a retuse venter and sutures with bifid auxiliary lobes....
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Ta
- Tabantalites
- Taffertia
- Talenticeras
- Tamarites
- Tapashanites
- Taramelliceras
- Tardeceras
- Tarrantoceras
- Taskanites
- Tauroceras
Te
- Tectiretites
- Tegoceras
- Teicherticeras
- Telermoceras
- Teloceras
- Telodactylus
- Temnoptychites
- Terektites
- Teshioites
- Tetragonites (syn. Epigoniceras)
- Tetrahoplites
- Tetrahoplitoides
- Tetraspidoceras
- Texanites
- Texoceras
Th
- Thallassoceras
- Thambites
- Thamboceras
- Thanamites
- Theganoceras
- Thetidites
- Thisbites
- Thomasites
- Thomelites
- Thorsteinssonoceras
- Thraxites
- Thurmannia
- Thurmanniceras
Ti
- Tibetites
- Ticinites
- Tiltoniceras
- Timanites
Ti (cont.)
- Timanoceras
- Timorites
- Tirolites
- Tissotia
- Titanites
- Tithopeltoceras
To
- Tollia
- Tolypeceras
- Tompophiceras
- Tongluceras
- Tongoboroceras
- Tonoceras
- Torcapella
- Toricellites
- Torleyoceras
- Tornia
- TornocerasTornocerasTornoceras is a strongly involute, subdiscoidal Middle and Upper Devonian goniatite with a suture that forms six to ten lobes.Aulatornoceras, Protornoceras, Epitornoceras, Lobotornoceras are among related genera included in the Tornoceratidae. Inclusion however varies from classification to...
- Tornquisites
- Tornquistites
- Torquatisphinctes
- Tovebirkelundites
- Toxamblyites
- Toxolioceras
- Tozerites
Tr
- Trachybaculites
- Trachyceras
- Trachylytoceras
- Trachyphyllites
- Trachypleuraspidites
- Trachysagenites
- Trachyscaphites
- Trachystenoceras
- Tragodesmoceras
- Tragodesmoceroides
- Tragolytoceras
- Tragophylloceras
- Tragorhacoceras
Tr (cont.)
- Transicoeloceras
- Traskites
- Treptocceras
- Trettinoceras
- Triaclymenia
- Triagolytoceras
- Triainoceras
- Tridentites
- Trigonogastrioceras
- Trilobiticeras
- Trimanticoceras
- Trimarginia
- Trimarginites
- Triozites
- Tritropidoceras
- Trizonoceras
- Trochleiceras
- Trochoclymenia
- Trolliceras
- TropaeumTropaeumTropaeum is an extinct genus of ammonite cephalopod found throughout the oceans of the world during the Early Cretaceous. As with many other members of the family Ancyloceratidae, there was a trend among species within this genus to uncoil somewhat, in a very similar manner in the genus...
- Tropiceltites
- Tropidoceras
- Tropigastrites
- Tropigymnites
- Tropites
- Tropitoides
- Truyolsoceras
Tu
- Tuberodiscoides
- Tugurites
- Tulites
- Tumaroceras
- Tumilites
- Tunesites
- Tunglanites
- TurrilitesTurrilitesTurrilites is a helically coiled ammonoid cephalopod from the lower part of the Upper Cretaceous ; generally included in the Ancyloceratina. Previously it was included in the ammonoid suborder, Lytoceratina....
- Turrilitoides
Ty
- Tympanoceras
- Tyrannites
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U
- UchtitesUchtitesUchtites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- UddenitesUddenitinaeThe Uddenitinae a subfamily of the Medlicottiidae, a family of ammonoid cephalopods included in the Prolecanitida.The Uddenitinae, proposed by Miller and Furnish, and known from the Pennsylvanian and Lower Permian, are transistional between the ancestral Pronoritidae and the more more traditional...
- UddenocerasUddenitinaeThe Uddenitinae a subfamily of the Medlicottiidae, a family of ammonoid cephalopods included in the Prolecanitida.The Uddenitinae, proposed by Miller and Furnish, and known from the Pennsylvanian and Lower Permian, are transistional between the ancestral Pronoritidae and the more more traditional...
- UhligellaUhligellaUhligella is an extinct cephalopod genus from the Early Cretaceous belonging to the ammonoid subclass and included in the Desmoceratidae....
- UhligiaUhligiaUhligia is a Lower Cretaceous ancylocerid ammonoid cephalopod initially found in Germany.Uhligia, named by Koenen, 1904, has the general form characteristic of heteromorph ancyloceratids. The early part is more or less straight, then sharply bent, followed by a second straight shaft and a final hook...
- UhligitesUhligitesUligites is an oppeliid ammonite included in the subfamily Streblitinaethat lived during the latest part of the Jurassic and earliest Cretaceous; from about 150 to 140 m.y.a....
- UmbetocerasUmbetocerasUmbetoceras is a genus belonging to the goniatitid superfamily Gastriocerataceae and family Homoceratidae from the Carboniferous of the Russian Federation and Uzbekistan....
- Umiaites
- UnipeltocerasUnipeltocerasUnipeltoceras is an extinct ammonite genus included in the perisphictacian family, Aspidoceratidae, and a member of the subfamily Peltoceratinae, that lived during the Callovian stage, late in the Middle Jurassic....
- UnquatornocerasUnquatornocerasUnquatornoceras is an extinct cephalopod genus from the Late Devonian belonging to the ammonoid order Goniatitida.-References:*...
- UptoniaUptoniaUptonia is an extinct ammonite from the Lower Jurassic that's included in the eoderoceratacean family Polymorphitidae.The shell of Uptonia is evolute with rounded simple ribs that form strong chevrons as they cross the venter on the outer rim, and which are free of tubercles. Some grew to be fairly...
- UrakawitesUrakawitesUrakawites is an extinct Ammonite from the Upper Cretaceous of Japan, Sakhalin, Russia, British Columbia, Canada and possibly Germany and Angola...
- UralocerasUralocerasUraloceras is an ammonoid cephalopod genus belonging to the goniatitid family Paragastrioceratidae. The genus was named by Ruzhencev 1936 and is a jr. synonym of Pseudogastrioceras Spath 1930 according to Miller, Furnish and Schindeworlf, 1957...
- UraloclymeniaUraloclymeniaUraloclymenia is an extinct ammonoid cephalopod genus from the Late Devonian, Famennian stage. The type species is Uraloclymenia volkovi Bogoslovskii, 1977...
- UralopronoritesUralopronoritesUralopronorites is a very involute and smooth, medium sized, prolecanitid with a distinct furrow along the venter and closed umbilicus. The adult suture has 22 lobes in all, 18 of which, nine on either side, are umbilical....
- UssuriaUssuriaUssuria is a Lower Triassic ammonite belonging to the ceratitid family Ussuriidae. The shell is involute, smooth, discoidal. Its suture is submonophyllic with lateral saddles notched on the dorsal side....
- UssuritesUssuritesUssurites is an extinct ammonoid cephalopod genus belonging to the suborder Phylloceratina and is included in the family Ussuritidae. Its range is restricted to the early Middle Triassic,...
- UtaturicerasUtaturicerasUtaturiceras is an upper Cretaceous ammonitid belonging to the family Acanthoceratidae and subfamily Mantelliceratinae.Utaturiceras is described in Matsumoto et al 2003 as having a fairly large shell at maturity, with a body chamber about half a whorl in length; whorls higher than broad and more...
V
- Vacekia
- Valanginites
- Valdedorsella
- Vallites
- Vandaites
- Vascoceras
- Vavilovites
- VelebitesVelebitesVelebites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- Veleziceras
- Venezoliceras
- Verancoceras
- Vermiceras
- Vermisphinctes
- Verneuilites
- Vertebriceras
- Vertebrites
- Veveysiceras
- Vicininodiceras
- Vickohlerites
- Vidrioceras
- Villania
- Vinalesites
- Vinalesphinctes
- Virgataxioceras
- Virgatites
- Virgatopavlovia
- Virgatosimoceras
- Virgatosphinctes
- Virgatospinctoides
- Vishnuites
- Voehringerites
- VredenburgitesVredenburgitesVredenburgites is a genus in the ceratitid family Trachyceratidae. Its shell has numerous, thin, flexious ribs.Related genera include Anasirenites, Sirenites, and Wangoceras.-References:...
W
- WaageninaWaageninaWaagenina is an extinct genus of ammonite....
- Waagenoceras
- Waehneroceras
- Wagnericeras
- Waldthausenites
- Wangoceras
- Wasatchites
- Watinoceras
- Wedekindella
- Wellerites
- Wellsites
- Welterites
- Werneroceras
- Wewokites
- Wheatleyites
- Whitbyiceras
- Wichmanniceras
- Wiedeyoceras
- Winchelloceras
- Windhauseniceras
- Winslowoceras
- Wintonia
- Witchellia
- Wocklumeria
- Wopfingites
- Wordieoceras
- Worthoceras
- WrightocerasWrightocerasWrightoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- Wyomingites
X
- XenoceltitesXenoceltitesXenoceltites is an extinct ceratite ammonite found world wide in the Lower Triassic. Xenoceltites belongs to the Xenoceltitidae, a taxonomic family within the ceratites that with two others now form the superfamily Xenodiscaceae...
- XenocephalitesXenocephalitesXenocephalites is an extinct ammonoid cephalopod genus from the early Middle Jurassic belonging to the suborder Ammonitina and to the superfamily Stephanocerataceae....
- XenodiscusXenodiscusXenodiscus is an extinct ammonoid cephalopod genus and one of the earliest ceratites, found in the Upper Permian of northern India and Timor. Xenodiscus is included in the family Xenodiscidae which is part of the ceratite superfamily Xenodiscaceae...
- XenodrepanitesXenodrepanitesXenodrepanites is an extent ammonoid cephalopod genus belonging to the Ceratitida from the Upper Triassic of the Himalayas. Xenodrepanites has a very compressed, discoidal shell with a ventral furrow bordered by crenulated keels and a sub-ammonitic suture.Some put Xenodrepanites in the Clydonitacan...
- XipherocerasXipherocerasXipheroceras is a Lower Jurassic ammonite belonging to the Eoceroceratidae, and sometimes placed in the subfamily Xipheroceratinae for which it is the namesake...
- XiphogymnitesXiphogymnitesXiphogymnites is an extinct genus of cephalopod belonging to the Ammonite subclass....
Y
- YabeicerasYabeicerasYabeiceras is an extinct genus of cephalopod belonging to the Ammonite subclass.It has only been discovered in fossil form....
- YakouniaYakouniaYakounia is an extinct genus of cephalopod belonging to the Ammonite subclass....
- YakutocerasYakutocerasYakutoceras is a genus belonging to the Orulganitidae family. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- YakutoglaphyritesYakutoglaphyritesYakutoglaphyrites is a genus belonging to the Orulganitidae family. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- YezoitesYezoitesYezoites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- YinocerasYinocerasYinoceras is a genus belonging to the Yinoceratinae subfamily of the Pseudohaloritidae family, a member of the Goniatitida order. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the...
- YokoyamacerasYokoyamacerasYokoyamaceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
Z
- ZadelsdorfiaZadelsdorfiaZadelsdorfia is an extinct genus belonging to the Gattendorfiinae subfamily, a member of the Goniatitida order. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:* accessed...
- ZaraiskitesZaraiskitesZaraiskites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ZealanditesZealanditesZealandites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ZemistephanusZemistephanusZemistephanus is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ZenoitesZenoitesZenoites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- Zenostephanus
- ZephyrocerasZephyrocerasZephyroceras is a genus belonging to the Somoholitaceae superfamilia. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:...
- ZetocerasZetocerasZetoceras is an extinct ammonoid cephalopod genus from the suborder Phylloceratina that lived during the Early and Middle Jurassic in what is now Europe, and is included in the Phylloceratidae....
- ZigzagicerasZigzagicerasZigzagiceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ZiyunitesZiyunitesZiyunites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ZonoviaZonoviaZonovia is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ZuercherellaZuercherellaZuercherella is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ZugodactylitesZugodactylitesZugodactylites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ZugokosmocerasZugokosmocerasZugokosmoceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ZuluicerasZuluicerasZuluiceras is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ZuluscaphitesZuluscaphitesZuluscaphites is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ZurcherellaZurcherellaZurcherella is an extinct genus of cephalopod belonging to the Ammonite subclass....
- ZurcheriaZurcheriaZurcheria is an extinct genus of cephalopod belonging to the Ammonite subclass....
See also
- List of nautiloids
- List of heteromorphic ammonites
- List of belemnites