This list of ammonites is a comprehensive listing of

genera Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclat ...

that are included in the subclass †

Ammonoidea Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttle ...

, excluding purely vernacular terms. The list includes genera that are commonly accepted as valid, as well those that may be invalid or doubtful ('' nomina dubia''), or were not formally published (''

nomina nuda In taxonomy, a ''nomen nudum'' ('naked name'; plural ''nomina nuda'') is a designation which looks exactly like a scientific name of an organism, and may have originally been intended to be one, but it has not been published with an adequate descr ...

''), as well as

junior synonyms The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linn ...

of more established names, and genera that are no longer considered ammonites. __NOTOC__

Reliability of this list

Most of the generic names in this list come from

Jack Sepkoski Joseph John Sepkoski Jr. (July 26, 1948 – May 1, 1999) 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 The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') 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 co ...

. Additional generic names included come from the Treatise or various peer review scientific journals. 150px, Ammolite_is_an_iridescent_gem_stone.html" ;"title="iridescent.html" ;"title="Ammolite is an iridescent">Ammolite is an iridescent gem stone">iridescent.html" ;"title="Ammolite is an iridescent">Ammolite is an iridescent gem stone made from the shells of fossil ammonites

A

file:Arcestes.jpg, 150px, The Triassic ammonites ''Arcestes, Arcestes intuslabiatus'' (top) and ''Arcestes, A. binacostomus'' (bottom), from what is now Austria file:Annuloceras summersi.JPG, 150px, Reconstruction of ''Annuloceras, Annuloceras summersi''. file:Ammonite Asteroceras.jpg, 150px, ''

Asteroceras ''Asteroceras'' is an extinct genus of cephalopod belonging to the Ammonite subclass. These fast-moving nektonic carnivores lived during the Triassic and Jurassic periods (from 205.6 to 189.6 Ma). Species *'' Asteroceras blakei'' Spath, 1925 *' ...

'', a Jurassic ammonite from England.

Ab

*''Abbasites'' *''Abichites'' *''Abrytasites''

Ac

*'' Acanthaecites'' *'' Acanthinites'' *'' Acanthoceras'' *'' Acanthoceratites'' *'' Acanthoclymenia'' *''

Acanthodiscus ''Acanthodiscus'' is an extinct ammonoid cephalopod genus from the order Ammonitida and included in the persphinctacean family Berriasellidae. The type species, named by Bruguière, 1792, is ''Acanthodiscus radiatus''.Acanthohoplites'' *'' Acantholytoceras'' *'' Acanthopleuroceras'' *''

Acanthoplites ''Acanthohoplites'' is an extinct genus of ammonites in the family Parahoplitidae that lived in the Aptian and Early Albian stages of the Early Cretaceous. Taxonomy The taxonomic position in the ''Treatise on Invertebrate Paleontology'' Pt ...

'' *''

Acanthoscaphites ''Acanthoscaphites'' is an extinct genus of cephalopod belonging to the Ammonite subclass. The average diameter of its shell was approximately , but some specimens have been found with a diameter of slightly over . Classification ''Acanthoscaphi ...

'' *'' Accardia'' *'' Achilleoceras'' *''

Acompsoceras ''Acompsoceras'' 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. ''Acompsoceras'' appears in the fossil r ...

'' *''

Aconeceras ''Aconeceras'' 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 ele ...

'' *''

Acriclymenia ''Acriclymenia'' was a genus of ammonites that existed during the Devonian period The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (My ...

'' *'' Acrimeroceras'' *'' Acrioceras'' *'' Acrocanites'' *''

Acrochordiceras ''Acrochordiceras'' is a genus of Middle Triassic ammonoid cephalopods belonging to the ceratitid family Acrochordiceratidae, included in the superfamily Ceratitoidea. The shell of ''Acrochordiceras'', as with the family, is more or less inv ...

'' *'' Acuariceras'' *'' Acuticostites'' *'' Acutimitoceras''

*'' Adkinsia'' *'' Adkinsites'' *'' Adnethiceras'' *'' Adrianites''

Ae

*'' Aegasteroceras'' *'' Aegoceras'' *''

Aegocrioceras ''Aegocrioceras'' is an extinct ammonite genus of cephalopod from the Lower Cretaceous included in the Ammonitida. It is known from northern Europe. ''Aegocrioceras'' is coiled in an open planispiral; whorls are strongly ribbed and bear spines on ...

'' *'' Aegolytoceras'' *'' Aenigmatoceras''

Ag

*'' Agassiceras'' *'' Agastrioceras'' *''

Agathiceras ''Agathiceras'' is a subglobose goniatitid from the family Agathiceratidae, widespread and locally abundant in Lower Pennsylvanian to Middle Permian sediments, e.g. the Urals, Sicily, and Texas. ''Agathiceras'', named by Gemmellaro in 1887 from ...

'' *'' Agoniatites''

Ai

*'' Ainoceras'' *''

Aioloceras ''Aioloceras'' is an ammonite, order Ammonitida, from near the end of the Early Cretaceous. The shell is compressed with the outer whorl covering much of the previous. Sides are slightly convex, converge toward a narrowly ached venter. Inner whor ...

Ak

*'' Akmilleria'' *'' Aktubinskia'' *'' Aktubites'' *'' Aktuboclymenia''

Al

*'' Alanites'' *'' Alaoceras'' *''

Albanites ''Albanites'' is a genus of extinct cephalopods 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, whic ...

'' *'' Alcidellus'' *'' Aldanites'' *'' Alfeldites'' *'' Algericeras'' *'' Algerites'' *'' Alligaticeras'' *'' Alloceratites'' *''

Alloclionites ''Alloclionites'' is a genus of extinct ammonoid cephalopods within the family Clionitidae which is part of the ceratitid superfamily Clydonitoidea. ''Alloclionites'' comes from the Upper Triassic of the Alps, Balkans, Himalayas, Timor, and Brit ...

'' *'' Allocrioceras'' *'' Alloptychites'' *'' Almites'' *'' Almohadites'' *'' Alocolytoceras'' *'' Alpinites'' *''

Alsatites ''Alsatites '' is an extinct genus of cephalopod belonging to the Ammonite subclass. They lived during the Early Jurassic, Hettangian till the Sinemurian In the geologic timescale, the Sinemurian is an age and stage in the Early or Lower J ...

'' *''

Altudoceras ''Altudoceras'' 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 nautilo ...

'' *'' Alurites''

Am

*''

Amaltheus ''Amaltheus'' 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 Pliensba ...

'' *''

Amarassites ''Amarassites'' is an extinct genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above spec ...

'' *'' Amauroceras'' *'' Ambites'' *'' Ammonellipsites'' *'' Ammonitoceras'' *'' Ammonoceratites'' *'' Amoebites'' *'' Amoeboceras'' *'' Amorina'' *'' Amphipoanoceras'' *'' Amphistephanites'' *'' Ampthillia''

An

*'' Anacleoniceras'' *'' Anadesmoceras'' *'' Anaflemingites'' *'' Anagaudryceras'' *''

Anagymnites ''Anagymnites'' is an extinct genus of cephalopods belonging to the Ammonite subclass. References The Paleobiology Database - ''Anagymnites'' entryAccessed 7 December 2011 Gymnitidae Ceratitida genera Anisian life {{Ceratitida-stub ...

'' *''

Anagymnotoceras ''Anagymnotoceras'' is an extinct genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above ...

'' *''

Anahamulina ''Anahamulina'' is an extinct ammonoid Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoi ...

'' *''

Anahoplites ''Anahoplites'' is a genus of rather involute, compressed hoplitid ammonites Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites ...

'' *'' Anaklinoceras'' *''

Analytoceras ''Analytoceras'' is an extinct genus of cephalopod belonging to the Ammonite subclass that lived during the early Jurassic. ''Analytoceras'', named by Alpheus Hyatt in 1900, is a Lytoceratida, lytoceratid and only member of the Pleuroacanthitidae, ...

'' *''

Ananorites ''Ananorites'' is a genus of extinct cephalopods 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 round ...

'' *'' Anapachydiscus'' *'' Anarcestes'' *'' Anascaphites'' *'' Anasibirites'' *'' Anasirenites'' *'' Anatibetites'' *'' Anatomites'' *'' Anatropites'' *'' Anatsabites'' *'' Anavirgatites'' *'' Anaxenaspis'' *'' Anclyoceras'' *'' Ancolioceras'' *'' Andersonites'' *'' Anderssonoceras'' *'' Andesites'' *'' Andiceras'' *'' Androgynoceras'' *'' Anetoceras'' *'' Aneuretoceras'' *'' Anfaceras'' *'' Anglesites'' *'' Angranoceras'' *'' Angulaticeras'' *'' Anisarcestes'' *'' Anisoceras'' *'' Ankinatsytes'' *'' Annuloceras'' *'' Anolcites'' *'' Anotoceras'' *'' Antarcticoceras''M.R.A. Thomson, « Ammonite faunas of the Lower Cretaceous of south-eastern Alexander Island », ''British Antarctic Survey Scientific Reports'', 80 (1974), p.1-44. *'' Anthracoceras'' *'' Anthracoceratites'' *'' Anthracoceratoides''

Ap

*'' Aphantites'' *'' Apleuroceras'' *'' Aplococeras'' *''

Apoderoceras ''Apoderoceras'' is an extinct genus of cephalopod belonging to the ammonite subclass. Biostratigraphic significance The International Commission on Stratigraphy (ICS) has assigned the First Appearance Datum of genus ''Apoderoceras'' and of ' ...

'' *'' Aposphinctoceras'' *'' Apsorroceras''

Aq

*'' Aquilonites''

Ar

*'' Araneites'' *'' Araxoceras'' *'' Arcanoceras'' *'' Arcestes'' *'' Archoceras'' *''

Arcthoplites ''Arcthoplites'' is an extinct genus of cephalopod belonging to the ammonite Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are ...

'' *'' Arcticoceras''

Ar (Cont.)

*''

Arctocephalites ''Arctocephalites'' is an extinct ammonitic cephalopod genus from the Middle Jurassic with a wide northern distribution belonging to the stephanoceratacean family, Cardioceratidae.Arkell et at, 1957, Mesozoic Ammonoidea , Treatise on Invertebra ...

'' *'' Arctoceras'' *'' Arctogymnites'' *''

Arctohungarites ''Arctohungarites'' is a genus of Triassic Ammonoidea, ammonoids now placed in the Ceratitida, ceratitid family Danubitidae, but previously included in the Hungeritidae. The shell of ''Arctohungerites'' is subdiscoidal, involute, with a rounde ...

'' *'' Arctomeekoceras'' *'' Arctomercaticeras'' *'' Arctoprionites'' *'' Arctoptychites'' *'' Arctosirenites'' *'' Arctotirolites'' *'' Arestoceras'' *''

Argentiniceras ''Argentiniceras'' is an extinct genus of cephalopod belonging to the Ammonite subclass. It belongs to the class Cephalopoda. Its fossils were found in Russia, Yemen, India, Mediterranean, Canada and South America South America is a co ...

'' *'' Argolites'' *'' Argonauticeras'' *'' Argosirenites'' *'' Arianites'' *'' Aricoceras'' *'' Arieticeras'' *''

Arietites ''Arietites'' is a genus of massive, giant evolute, psiloceratacean ammonites in the family Arietitidae Arietitidae is a family of true ammonites that make up part of the superfamily Psiloceratoidea, named after the type genus '' Arietites ...

'' *'' Arietoceltites'' *'' Arisphinctes'' *'' Aristoceras'' *'' Aristoceratoides'' *'' Aristoptychites'' *'' Arkanites'' *'' Armatites'' *'' Arnioceltites'' *'' Arnioceras'' *'' Arniotites'' *'' Arpadites'' *''

Arthaberites ''Arthaberites'' is a genus of ceratitid cephalopods included in the Noritidae The Noritidae, sometimes spelled Noritidea, is an extinct cephalopod family of belonging to the ammonoid order Ceratitida and superfamily Noritoidea Noritoidea, ...

'' *'' Artinksia'' *'' Artioceras'' *'' Artioceratoides''

As

*'' Asaphoceras'' *'' Asapholytoceras'' *'' Asklepioceras'' *'' Aspenites'' *'' Asphinctites'' *'' Aspidoceras'' *'' Aspidostephanus'' *'' Aspinoceras'' *''

'' *'' Asthenoceras'' *'' Astiericeras'' *'' Astieridiscus'' *'' Astreptoceras'' *'' Asturoceras''

At

*'' Ataxioceras'' *'' Atlantoceras'' *'' Atsabites''

Au

*'' Audaxlytoceras'' *'' Audouliceras'' *'' Augurites'' *'' Aulacaganides'' *'' Aulacosphinctes'' *'' Aulacosphinctoides'' *''

Aulacostephanus ''Aulacostephanus'' is an extinct ammonoid cephalopod genus from the Upper Jurassic Tithonian belonging to the perisphinctoidean family Aulacostephanidae. ''Aulacostephanus'' produced a discoidal, strongly ribbed, evolute shell of moderate s ...

'' *'' Aulasimoceras'' *'' Aulatornoceras'' *'' Austiniceras'' *'' Australiceras'' *'' Austroceratites'' *'' Austrotrachyceras''

Av

*'' Aveyroniceras''

Ax

*'' Axinolobus'' *'' Axonoceras''

B

150px, Fragmented fossil specimens of '' Baculites'' Bostrychoceras polyplocum 01

*'' Bacchites'' *'' Bactrites'' *'' Baculina'' *''

Baculites ''Baculites'' ("walking stick rock") is an extinct genus of cephalopods with a nearly straight shell, included in the heteromorph ammonites. The genus, which lived worldwide throughout most of the Late Cretaceous, and which briefly survived the ...

'' *'' Badiotites'' *'' Bagnolites'' *'' Balatonites'' *'' Balearites'' *'' Balkanites'' *'' Balticeras'' *'' Balvia'' *'' Bamyaniceras'' *'' Barguesiella'' *'' Baronnites'' *'' Barrandeites'' *'' Barremites'' *'' Barroisiceras'' *'' Baschkirites'' *'' Bashkortoceras'' *'' Baskaniiceras'' *'' Basleoceras'' *'' Bastelia'' *'' Bauchioceras'' *'' Bayleites'' *'' Beaniceras'' *'' Beatites'' *'' Behemoth'' *'' Beleutoceras'' *'' Beloceras'' *'' Benacoceras'' *'' Beneckeia'' *'' Benueites'' *'' Berbericeras'' *'' Berniceras'' *'' Berriasella'' *'' Berrosiceras'' *'' Betyokites'' *''

Beudanticeras ''Beudanticeras'' is an extinct cephalopod genus from the Late Cretaceous period; Albian and Cenomanian, belonging to the ammonoid subclass and included in the family Desmoceratidae. ''Beudanticeras'' has a rather to very compressed shell that i ...

'' *''

Beudantiella ''Beudantiella'' is a high whorled, compressed, sparsely ribbed ammonite from the Lower Cretaceous, (Upper Albian), found in Queensland, Australia. ''Beudantiella'' is a member of the Beudanticeratinae, a desmoceratid subfamily, and of the Desmo ...

'' *''

Bevahites ''Bevahites'' is a Cretaceous ammonite with an evolute, ribbed, tuberculate, and keeled shell with a squarish to compressed whorl section. ''Bevahites'' is a member of the collignoniceratid subfamily Texanitinae as well as of the Acanthoceratoi ...

'' *'' Beyrichites'' *'' Beyrichoceras'' *'' Beyrichoceratoides'' *'' Bhimaites'' *''

Bifericeras ''Bifericeras'' is a Lower Jurassic ammonite belonging to the family Eoderoceratidae, and sometimes placed in the subfamily Xipherceratinae. Whorls are strongly depressed, but still evolute in coiling. The early growth state is prolonged, and sm ...

'' *'' Bigotites'' *'' Bihenduloceras'' *'' Bilinguites'' *'' Billcobbanoceras'' *'' Biloclymenia'' *'' Biltnerites'' *'' Binatisphinctes'' *'' Binneyites'' *'' Biplices'' *'' Bisatoceras'' *'' Blanfordiceras'' *'' Bochianites'' *'' Bodylevskites'' *'' Boehmoceras'' *'' Boesites'' *'' Bogdanoceras'' *'' Bollandites'' *'' Bollandoceras'' *'' Boreomeekoceras'' *'' Borissjakoceras'' *'' Borkinia'' *'' Bornhardticeras'' *'' Bosnites'' *''

Bostrychoceras ''Bostrychoceras'' is a genus of heteromorph ammonite from the family Nostoceratidae. Fossils have been found in Late Cretaceous sediments in Europe and North America North America is a continent in the Northern Hemisphere and alm ...

'' *'' Boucaulticeras'' *'' Bouleiceras'' *'' Bradfordia'' *'' Brahmaites'' *'' Bramkampia'' *'' Brancoceras'' *'' Branneroceras'' *'' Branneroceratoides'' *'' Brasilia'' *'' Bredyia'' *'' Brevikites'' *'' Brewericeras'' *'' Brightia'' *'' Brodieia'' *'' Brotheotrachyceras'' — originally published as a subgenus of ''

Trachyceras ''Trachyceras'' is a genus belonging to the extinct subclass of cephalopods known as ammonites. Specifically it belongs in the order Ceratitida Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as we ...

'' *'' Brouwerites'' *'' Buchiceras'' *'' Budaiceras'' *'' Buddhaites'' *'' Bukowskiites'' *'' Bullatimorphites'' *'' Bulogites'' *'' Bunburyiceras'' *'' Burckhardites'' *'' Burijites'' *'' Busnardoites''

C

Ca

*'' Cabrievoceras'' *'' Cadoceras'' *''

Cadomites ''Cadomites'' is an extinct ammonite genus from the superfamily Stephanoceratoidea that lived during the Middle Jurassic (upper Bajocian – lower Callovian). Description ''Cadomites'' is directly descended from '' Stephanoceras'', with a simi ...

'' *'' Cadomoceras'' *'' Caenisites'' *'' Caenocyclus'' *'' Caenolyroceras'' *'' Cainoceras'' *'' Calaiceras'' *'' Calanquites'' *'' Californiceras'' *''

Callihoplites ''Callihoplites'' is a genus of rather evolute ammonites from the Lower Cretaceous, Late Albian. Its whorl section squarish or compressed, inner whorls bearing umbilical bullae and ventrolateral clavi, with or without looped ribs between. The bo ...

'' *'' Calliphylloceras'' *'' Calliptychoceras'' *'' Callizoniceras'' *''

Caloceras ''Caloceras'' is an extinct genus of cephalopod belonging to the ammonite Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are mor ...

'' *'' Calycoceras'' *'' Campylites'' *'' Canadoceras'' *'' Canavarella'' *'' Canavaria'' *'' Canavarites'' *'' Cancelloceras'' *'' Cantabricanites'' *'' Cantabrigites'' *'' Cardiella'' *''

Cardioceras ''Cardioceras'' is an extinct ammonite genus belonging to the family Cardioceratidae. These fast-moving nektonic carnivores lived during the Jurassic period, Oxfordian age. Description Shells of ''Cardioceras'' species can reach a diameter of ...

'' *'' Carinoceras'' *'' Carinoclymenia'' *'' Carinophylloceras'' *'' Carnites'' *'' Carstenia'' *'' Carthaginites'' *'' Catacoeloceras'' *'' Catasigaloceras'' *'' Catulloceras'' *'' Caucasites'' *'' Caumontisphinctes'' *'' Cavilentia''

Ce

*'' Ceccaites'' *'' Celaeceras'' *'' Cenisella'' *''

Ceratites ''Ceratites'' is an extinct genus of ammonite cephalopods. These nektonic carnivores lived in marine habitats in what is now Europe, during the Triassic, from the upper-most Anisian to the lower Ladinian The Ladinian is a stage and age in the ...

'' *'' Ceratpbeloceras'' *'' Chamoussetia''

Ch

*'' Chanasia'' *'' Changhsingoceras'' *'' Chartronia'' *'' Cheiloceras'' *'' Cheloniceras'' *''

Cheltonia ''Cheltonia'' is an extinct genus of ammonite from the Upper Sinemurian substage of Lower Jurassic of Europe, Africa,Chesapeakiceras'' *'' Chetaites'' *'' Chieseiceras'' *'' Chioceras'' *'' Chiotites'' *'' Choffatia'' *'' Choffaticeras'' *'' Chondroceras'' *'' Choristoceras'' *'' Christioceras'' *'' Christophoceras'' *'' Chumazites''

Ci

*'' Cibolaites'' *'' Cibolites'' *'' Cicatrites'' *'' Cirroceras''

Cl

*'' Cladiscites'' *'' Clambites'' *'' Cleistosphinctes'' *''

Cleoniceras ''Cleoniceras'' is a rather involute, high-whorled hoplitid from the Lower to basal Middle Albian of Europe, Madagascar, and Transcaspian region. The shell has a generally small umbilicus, arched to acute venter, and typically at some growth stag ...

'' *'' Cleviceras'' *'' Clinolobus'' *'' Clionitites'' *''

Clioscaphites ''Clioscaphites'' is an extinct genus of ammonite belonging to the family Scaphitidae. Species in this genus are important index fossils of the Western Interior Seaway of the Coniacian to Santonian Ages of the Cretaceous The Cretaceous ( ) ...

'' *'' Clistoceras'' *'' Cloioceras'' *'' Cluthoceras'' *'' Clydomphalites'' *'' Clydoniceras'' *'' Clydonites'' *'' Clymenia'' *'' Clymenoceras'' *'' Clypeoceras''

Co

*'' Coahuilites'' *'' Cobbanites'' *'' Cobbanoscaphites'' *'' Cochleiferoceras'' *'' Cochloceras'' *'' Cochlocrioceras'' *'' Coeloceltites'' *'' Coeloceras'' *'' Coeloderoceras'' *'' Coilopoceras'' *'' Colchidites'' *'' Collectoceras'' *'' Collignoniceras'' *'' Collignonites'' *'' Collina'' *'' Collotia'' *'' Colombiceras'' *'' Coloradoscaphites'' *'' Columbites'' *'' Concavites'' *'' Conlinoceras'' *'' Constileioceras'' *'' Convoluticeras'' *'' Cordubiceras'' *'' Coroceras'' *'' Corongoceras'' *'' Coroniceras'' *'' Coronites'' *'' Costaclymenia'' *'' Costidiscus'' *'' Costigymnites'' *'' Costileioceras'' *'' Costimitoceras'' *'' Cottreauites'' *'' Couloniceras'' *'' Cowtoniceras''

Cr

*'' Cranocephalites'' *'' Craspedites'' *'' Craspedodiscus'' *'' Crassiceras'' *'' Crassiplanulites'' *'' Crassotornoceras'' *'' Cravenites'' *''

Cravenoceras ''Cravevoceras'' is an Upper Paleozoic ammonite in the goniatite family Cravenoceratidae, probably derived from '' Pachylyroceras'' and contemporary with other cravenoceratid genera like '' Caenolyroceras'', '' Tympanoceras'' and later '' Alaoce ...

'' *'' Cravenoceratoides'' *'' Creniceras'' *'' Crickites'' *'' Crimites'' *'' Crioceras'' *''

Crioceratites ''Crioceratites'' is an ammonite genus from the Early Cretaceous belonging to the Ancyloceratoidea. ''Crioceratites'' was formerly included in the Ancyloceratidae, in the subfamily Crioceratinae which was subsequently elevated in rank to the fa ...

'' *'' Cruasiceras'' *'' Crucilobiceras'' *'' Crussoliceras'' *'' Cryptoclymenia'' *'' Cryptotexanites''

Ct

*'' Ctenobactrites'' *'' Cteroclymenia''

Cu

*'' Cubaochetoceras'' *'' Cuccoceras'' *'' Cuneicardioceras'' *'' Cunitoceras'' *'' Cunningtoniceras'' *'' Cutchisphinctes'' *'' Cuyaniceras''

Cy

*'' Cyclobactrites'' *'' Cycloceltites'' *'' Cyclolobus'' *'' Cycloclymenia'' *'' Cylioceras'' *'' Cymaceras'' *'' Cymaclymenia'' *'' Cymahoplites'' *'' Cymbites'' *'' Cymoceras'' *'' Cyrtobactrites'' *'' Cyrtochilus'' *'' Cyrtoclymenia'' *'' Cyrtopleurites'' *'' Cyrtosiceras''

Cz

*'' Czekanowskites''

D

Da

*''

Dactylioceras ''Dactylioceras'' was a widespread genus of ammonites from the Lower Jurassic period, approximately 180 million years ago ( mya). Etymology The name ''Dactylioceras'' comes from the Greek ''dactyl'', meaning “finger”, and refers to the shell ...

'' *'' Dagnoceras'' *'' Daixites'' *'' Dalmasiceras'' *'' Dalmatites'' *'' Damaisiceras'' *'' Damesiceras'' *'' Damesites'' *'' Danubisphinctes'' *'' Danubites'' *'' Daphnites'' *'' Daraelites'' *'' Darellia'' *'' Darvasiceras'' *'' Dasyceras'' *''

Daxatina ''Daxatina'' is a fossil ammonoid cephalopod included in the trachyceratid family of the order Ceratitida Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper ...

'' *'' Dayiceras''

De

*'' Decipia'' *'' Decorites'' *'' Deiradoceras'' *'' Delecticeras'' *'' Delepinoceras'' *'' Delphinites'' *'' Demarezites'' *'' Derolytoceras'' *'' Deshayesites'' *''

Desmoceras ''Desmoceras'' is a genus of ammonites belonging to the family Desmoceratidae. These cephalopods were fast-moving nektonic carnivores. They lived in the Early Cretaceous; Albian epoch. Species * ''Desmoceras alamoense'' * ''Desmoceras argonaut ...

'' *'' Desmophyllites'' *'' Desmoscaphites'' *'' Devonobactrites'' *'' Devonopronorites''

Dh

*'' Dhosaites'' *'' Dhrumaites''

Di

*'' Diaboloceras'' *'' Diadochoceras'' *'' Diamanticeras'' *'' Diaplococeras'' *'' Diaziceras''

Di (Cont.)

*'' Dichotomites'' *'' Dichotomoceras'' *'' Dichotomosphinctes'' *'' Dickersonia'' *'' Dicostella'' *'' Didymites'' *''

Didymoceras ''Didymoceras'' is an extinct genus of ammonite cephalopod from the Late Cretaceous epoch (approximately 76 Ma). It is one of the most bizarrely shaped genera, with a shell that spirals upwards into a loose, hooked tip. It is thought to have drif ...

'' *'' Dieneria'' *'' Difuntites'' *'' Digitophyllites'' *'' Dilatobactrites'' *'' Dimeroceras'' *'' Dimeroclymenia'' *'' Dimorphinites'' *'' Dimorphites'' *'' Dimorphoceras'' *'' Dimorphoceratoides'' *'' Dimorphoplites'' *'' Dimorphotoceras'' *'' Dinarites'' *'' Diodochoceras'' *'' Dionites'' *'' Diplacmoceras'' *'' Diplasioceras'' *'' Diplesioceras'' *''

Diplomoceras ''Diplomoceras'' is a genus of ammonites included in the family Diplomoceratidae. Fossils of species within this genus have been found in the Late Cretaceous sediments (age range: Campanian-Maastrichtian The Maastrichtian () is, in the ICS ...

'' *'' Diplosirenites'' *'' Dipoloceras'' *'' Dipoloceroides'' *'' Dirrymoceras'' *'' Discoceratites'' *'' Discoclymenia'' *'' Discohoplites'' *'' Discophiceras'' *'' Discophyllites'' *'' Discoptychites'' *''

Discoscaphites ''Discoscaphites '' is an extinct genus of ammonite. This genus may have been one of the few to have briefly survived the K-Pg mass extinction. Distributions Cretaceous of Greenland, Alabama, Arkansas, California, Colorado, Kansas, Maryland, ...

'' *'' Discosphinctes'' *'' Discosphinctoides'' *'' Discotropites'' *'' Distichites'' *'' Distichoceras'' *'' Distoloceras''

Di (cont. 2)

*'' Dittmarites'' *'' Divisosphinctes''

Dj

*'' Djurjuriceras''

Do

*'' Dobrodgeiceras'' *'' Dobrogeites'' *'' Docidoceras'' *'' Dolikephalites'' *'' Domanikoceras'' *'' Dombarigloria'' *''

Dombarites ''Dombarites'' 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'' According to ...

'' *'' Dombarocanites'' *'' Donetzoceras'' *'' Dorikranites'' *'' Dorsetensia'' *'' Dorsoplanites'' *'' Doryceras'' *'' Doubichites'' *'' Doulingoceras'' *''

Douvilleiceras ''Douvilleiceras'' is a genus of ammonites from the Cretaceous, Middle to Late Cretaceous. Its fossils have been found worldwide, in Africa, Asia, Europe, and North America, North and South America. Description Shells of ''Douvilleiceras inaequi ...

Dr

*'' Drepanites'' *'' Drumoceras''

Du

*'' Duashnoceras'' *'' Dufrenoya'' *''

Dumortieria ''Dumortieria'' is a genus of ammonites belonging to the family Graphoceratidae. Fossil record These cephalopods were fast-moving nektonic carnivores. They lived in the Late Jurassic, upper Toarcian age (from about 180.1 to 175.6 million years ...

'' *'' Dunbarites'' *'' Dunedinites'' *'' Dunveganoceras'' *'' Durangites'' *'' Durotrigensia'' *'' Durvilleoceras''

Dy

*'' Dyscheiloceras''

Dz

*'' Dzhaprakoceras'' *'' Dzhulfoceras''

E

*'' Eboraciceras'' *'' Eboroceras'' *'' Ebrayiceras'' *'' Echioceratoides'' *''

Echioceras ''Echioceras'' is an extinct genus of ammonites from the Early Jurassic of Europe and North America. Description Shell of ''Echioceras'' species can reach a diameter of about .. The narrow and broad evolute shell is reinforced by fine ribs on inn ...

'' *'' Ectocentrites'' *'' Ectolcites'' *'' Edmundites'' *'' Egrabensiceras'' *'' Eleganticeras'' *'' Elephantoceras'' *'' Ellipsoceras'' *'' Elobiceras'' *'' Emaciaticeras'' *'' Emileia'' *'' Emilites'' *'' Emperoceras'' *'' Enayites'' *'' Engonoceras'' *'' Enosphinctes'' *'' Entogonites'' *'' Eoacrochordiceras'' *'' Eoaraxoceras'' *'' Eoasianites'' *'' Eobeloceras'' *'' Eocanites'' *'' Eocephalites'' *'' Eochetoceras'' *'' Eocrioceratites'' *'' Eodanubites'' *'' Eoderoceras'' *'' 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'' *'' Epadrianites'' *'' Epancyloceras'' *'' Eparietites'' *''

Epaspidoceras ''Epaspidoceras'' is an extinct ammonoid cephalopod genus belonging to the order Ammonitida, family Aspidoceratidae. These cephalopods were fast-moving nektonic carnivores. They lived during the Jurassic (Kimmeridgian In the geologic timescale ...

'' *'' Epicanites'' *'' Epiceltites'' *'' Epiceltitoides'' *'' Epicephalites'' *'' Epiceratites'' *'' Epicheloniceras'' *'' Epicosmoceras'' *'' Epideroceras'' *'' Epiglyphioceras'' *'' Epiglyptoxoceras'' *'' Epigonites'' *'' Epigymnites'' *'' Epihoplites'' *'' Epijuresanites'' *'' Epileymeriella'' *'' Epimayaites'' *'' Epimorphoceras'' *'' Epipallasiceras'' *'' Epipeltoceras'' *'' Episageceras'' *'' Episculites'' *'' Epistrenoceras'' *'' Epitauroceras'' *'' Epithalassoceras'' *'' Epitornoceras'' *'' Epivirgatites'' *'' Epiwocklumeria'' *'' Epophioceras'' *'' Erbenoceras'' *'' Eremites'' *'' Erinoceras'' *'' Erioliceras'' *'' Eristavites'' *'' Ermoceras'' *'' Erycites'' *'' Erymnoceras'' *'' Erymnocerites'' *'' Esericeras'' *'' Euagassiceras'' *'' Euaptetoceras'' *'' Euaspidoceras'' *'' Eubaculites'' *''

Eubostrychoceras ''Eubostrychoceras'' is a genus of helically wound, corkscrew form, heteromorph ammonite which lived during the Upper Cretaceous (M Turonian - Campanian). The genus is included in the ancycleratid family Nostoceratidae. The shell of ''Eubostryc ...

'' *'' Eubranoceras'' *'' Eucalycoceras'' *'' Eucoroniceras'' *'' Eucycloceras'' *'' Eudiscoceras'' *'' Eudmetoceras'' *'' Euflemingites'' *''

Euhoplites ''Euhoplites'' is an extinct ammonoid cephalopod from the Lower Cretaceous, characterized by strongly ribbed, more or less evolute, compressed to inflated shells with flat or concave ribs, typically with a deep narrow groove running down the mi ...

'' *'' Euhoploceras'' *'' Euhystrichoceras'' *'' Euisculites'' *'' Eulophoceras'' *'' Eulytoceras'' *'' Eumedlicottia'' *'' Eumorphoceras'' *'' Euomphaloceras'' *'' Eupachydiscus'' *'' Euphylloceras'' *'' Eupinacoceras'' *'' Eupleuroceras'' *'' Euprionoceras'' *'' Euptychoceras'' *'' Eurites'' *'' Euroceras'' *'' Eurycephalites'' *'' Eurynoticeras'' *'' Eusagenites'' *'' Eutomoceras'' *'' Euturrilites'' *'' Exiteloceras'' *'' Exotornoceras'' *'' Ezilloella''

F

*''

Fagesia ''Fagesia'' is a small, subglobular ammonite (suborder Ammonitina) belonging to the vascoceratid family of the Acanthocerataceae that lived during the Turonian stage of the Late Cretaceous, 92-88 Ma ago. The shell of ''Fagesia'' is about 9.5 ...

'' *'' Falciclymenia'' *'' Falciferella'' *'' Falcitornoceras'' *'' Fallacites'' *'' Falloticeras'' *'' Fanninoceras'' *'' Farbesiceras'' *'' Farnhamia'' *'' Fascipericyclus'' *'' Favrella'' *'' Fayettevillea'' *'' Fehlmannites'' *'' Ferganoceras'' *'' Ficheuria'' *'' Fikaites'' *'' Finiclymenia'' *'' Fissilobiceras'' *'' Flabellisphinctes'' *'' Flemingites'' *'' Flexiclymenia'' *'' Flexispinites'' *''Flexoptychites'' *''Flickia'' *''Fontanelliceras'' *''Fontannesia'' *''Fontannesiella'' *''Foordites'' *''Forbesiceras'' *''Forresteria'' *''Fournierella (cephalopod), Fournierella'' *''Frankites'' *''Frechiella'' *''Frechites'' *''Frenguelliceras'' *''Fresvillia'' *''Frogdenites'' *''Fuciniceras'' *''Funiferites''

G

*''Gabbioceras'' *''Gabillytes'' *''Gaetanoceras'' *''Gagaticeras'' *''Gaitherites'' *''Galaticeras'' *''Galbanites'' *''Gangadharites'' *''Garantiana'' *''Gargasiceras'' *''Garniericeras'' *''Garnierisphinctes'' *''Garroniceras'' *''Gastrioceras'' *''Gastroplites'' *''Gattendorfia'' *''Gattenpleura'' *''Gaudryceras'' *''Gaurites'' *''Gauthiericeras'' *''Gazdaganites'' *''Gemmellaroceras'' *''Gentoniceras'' *''Genuclymenia'' *''Georgioceras'' *''Germariceras'' *''Gevanites'' *''Geyeroceras'' *''Giovaraites'' *''Girtyoceras'' *''Glabrophysodoceras'' *''Glamocites'' *''Glaphyrites'' *''Glassoceras'' *''Glatziella'' *''Glaucolithites'' *''Gleboceras'' *''Gleviceras'' *''Glochiceras'' *''Glottoptychinites'' *''Glyphidites'' *''Glyphiolobus'' *''Glyptarpites'' *''Glyptoceras'' *''Glyptoxoceras'' *''Gnomohalorites'' *''Gogoceras'' *''Goliathiceras'' *''Goliathites'' *''Goniatites'' *''Gonioclymenia'' *''Goniocyclus'' *''Gonioglyphioceras'' *''Gonioloboceras'' *''Gonioloboceratoides'' *''Gonionotites'' *''Gonolkites'' *''Goodhallites'' *''Gracilisphinctes'' *''Gracilites'' *''Grambergia'' *''Grammoceras'' *''Grandidiericeras'' *''Graphoceras'' *''Gravesia (ammonite), Gravesia'' *''Grayiceras'' *''Graysonites'' *''Gregoryceras'' *''Griesbachites'' *''Groebericeras'' *''Groenlandites'' *''Grossouvria'' *''Grossouvrites'' *''Guembelites'' *''Guhsania'' *''Guleilmites'' *''Guleimiceras'' *''Gulielmina'' *''Gulielmites'' *''Gunnarites'' *''Gyaloceras'' *''Gymnites'' *''Gymnodiscoceras'' *''Gymnoplites'' *''Gymnotoceras'' *''Gymnotropites'' *''Gyroceratites'' *''Gyroclymenia'' *''Gyronites''

H

Ha

*''Haidingerites'' *''Halilucites'' *''Halorites'' *''Hamites (genus), Hamites'' *''Hamiticeras'' *''Hamitoides'' *''Hammatoceras'' *''Hammatocyclus'' *''Hamulina'' *''Hamulinites'' *''Hanielites'' *''Hannaoceras'' *''Hantkeniceras'' *''Haploceras'' *''Haplophylloceras'' *''Haplopleuroceras'' *''Haploscaphites'' *''Haresiceras'' *''Harpoceras'' *''Harpoceratoides'' *''Harpohildoceras'' *''Harpophylloceras'' *''Hatchericeras'' *''Hauericeras'' *''Hauerites'' *''Haugia''

He

*''Hebetoxyites'' *''Hecticoceras'' *''Hectioceras'' *''Hecticoceras, Hectioceratoides'' *''Hectoroceras'' *''Hedenstroemia'' *''Heinzia'' *''Helicancylus'' *''Helicocyclus'' *''Helictites (ammonite), Helictites'' *''Hemiaspenites'' *''Hemibaculites'' *''Hemigarantia'' *''Hemihaploceras'' *''Hemihoplites''

He (Cont.)

*''Hemilecanites'' *''Hemilytoceras'' *''Hemiptychoceras'' *''Hemisimoceras'' *''Hemitetragonites'' *''Hemitissotia'' *''Hengestites'' *''Heraclites (ammonite), Heraclites'' *''Herrickiceras'' *''Hertleinites'' *''Herznachites'' *''Heteroceras'' *''Heterotissotia'' *''Hexaclymenia''

Hi

*''Hibernicoceras'' *''Hildaites'' *''Hildoceras'' *''Hildoceratoides'' *''Hildoglochiceras'' *''Himalayites'' *''Himantoceras'' *''Himavatites'' *''Himispiticeras''

Hl

*''Hlawiceras''

Ho

*''Hodsonites'' *''Hoeninghausia'' *''Hoepenites'' *''Palermoceras, Hoffmannia'' *''Holcodiscoides'' *''Holcodiscus'' *''Holcolissoceras'' *''Holcophylloceras'' *''Holcolytoceras'' *''Holcoptychites'' *''Hollandites'' *''Holzapfeloceras'' *''Holzbergia''

Ho (Cont.)

*''Homerites'' *''Homoceras'' *''Homoceratoides'' *''Homoeoplanulites'' *''Hoplikosmokas'' *''Hoplites (ammonite), Hoplites'' *''Hoplitoides'' *''Hoplitoplacenticeras'' *''Hoplocardioceras'' *''Hoplocrioceras'' *''Hoploscaphites'' *''Hoplotropites'' *''Horioceras'' *''Hourcquia''

Hu

*''Hubertoceras'' *''Hudlestonia'' *''Hudsonoceras'' *''Huishuites'' *''Hulenites'' *''Hunanites'' *''Hungarites''

Hy

*''Hyattites'' *''Hyattoceras'' *''Hybonoticeras'' *''Hypacanthoplites'' *''Hyparpadites'' *''Hypengonoceras'' *''Hyperderoceras'' *''Hypergoniatites'' *''Hyperlioceras'' *''Hyphantoceras'' *''Hyphoplites'' *''Hypisculites'' *''Hypocladiscites'' *''Hypophylloceras'' *''Hypoturrilites'' *''Hypoxynoticeras'' *''Hyrcanites'' *''Hysteroceras''

I

*''Iberites'' *''Idanoceras'' *''Idiocycloceras'' *''Idiohamites'' *''Idoceras'' *''Ilowaiskya'' *''Imitoceras'' *''Imlayiceras'' *''Inaigymnites'' *''Indigirites'' *''Indigirophyllites'' *''Indoceltites'' *''Indocephalites'' *''Indoceras'' *''Indojuvavites'' *''Indonesites'' *''Indoscaphites'' *''Indosphinctes'' *''Iniskinites'' *''Intoceras'' *''Intornites'' *''Intranodites'' *''Involuticeras'' *''Inyoites'' *''Inzeroceras'' *''Iranoceras'' *''Irinoceras'' *''Isculites'' *''Isculitoides'' *''Ismidites'' *''Isohomoceras'' *''Isohoplites'' *''Isterites'' *''Istreites'' *''Ivoites''

J

*''Jacobites (genus), Jacobites'' *''Janenschites'' *''Japonites'' *''Jauberticeras'' *''Jeanneticeras'' *''Jeanvogericeras'' *''Jeletzkytes'' *''Jellinekites'' *''Jimboiceras'' *''Jimenites'' *''Joannites (genus), Joannites'' *''Jouaniceras'' *''Jovites'' *''Juddiceras'' *''Judicarites'' *''Juraphyllites'' *''Juresanites'' *''Juvavites'' *''Juvenites''

K

*''Kabylites'' *''Kachpurites'' *''Kalloclymenia'' *''Kamerunoceras'' *''Kammerkaroceras'' *''Kamptoclymenia'' *''Kamptokephalites'' *''Karaclymenia'' *''Karagandoceras'' *''Karamaiceras'' *''Karamaites'' *''Karangatites'' *''Karapadites'' *''Karaschiceras'' *''Kardailites'' *''Karlwaageites'' *''Karsteniceras'' *''Kashmirites'' *''Katacanites'' *''Katroliceras'' *''Katrolites'' *''Kayutoceras'' *''Kazakhoceras'' *''Kazakhoclymenia'' *''Kazakhstania (ammonite), Kazakhstania'' *''Kazakhstanites'' *''Kazanskyella'' *''Kellawaysites'' *''Kellnerites'' *''Kelteroceras'' *''Kenseyoceras'' *''Kepplerites'' *''Keppleritiana'' *''Kerberites'' *''Keyserlingites'' *''Kheraiceras'' *''Hecticoceras, Kheraites'' *''Khvalynites'' *''Kiaclymenia'' *''Kielcensia'' *''Kilianella'' *''Kimoceras'' *''Kingites'' *''Kingoceras'' *''Kinkeliniceras'' *''Kiparisovia'' *''Kiparisovites'' *''Kirsoceras'' *''Kitchinites'' *''Klamathites'' *''Klematosphinctes'' *''Klipsteinia'' *''Knemiceras'' *''Koenenites'' *''Kohaticeras'' *''Koloceras'' *''Komioceras'' *''Koninckites'' *''Korythoceras'' *''Kosmermoceras'' *''Kosmoceras'' *''Kosmoclymenia'' *''Kossmatella'' *''Kossmatia'' *''Kossmaticeras'' *''Kourazoceras'' *''Kozhimites'' *''Krafftoceras'' *''Kranaosphinctes'' *''Krumbeckia'' *''Kufengoceras'' *''Kumatostephanus'' *''Kurnubiella'' *''Kushanites'' *''Kutatissites''

L

*''Labeceras'' *''Laboceras'' *''Labyrinthoceras'' *''Laganoclymenia'' *''Lagowites'' *''Lamberticeras'' *''Lamites'' *''Lanceolites'' *''Lanceoloboceras'' *''Laqueoceras'' *''Latanarcestes'' *''Latisageceras'' *''Laugeites'' *''Lecanites'' *''Lechites (genus), Lechites'' *''Lecointriceras'' *''Leconteiceras'' *''Leconteites'' *''Leeites'' *''Lehmaniceras'' *''Leioceras'' *''Leiophyllites'' *''Leislingites'' *''Lemuroceras'' *''Lenotropites'' *''Lenticeras'' *''Lenticoceltites'' *''Leopoldia (Ammonite), Leopolda'' *''Leptaleoceras'' *''Leptechioceras'' *''Lepthoplites'' *''Leptoceras (ammonite), Leptoceras'' *''Leptonotoceras'' *''Leptosphinctes'' *''Leptotetragonites'' *''Leukadiella'' *''Lewesiceras'' *''Lewyites'' *''Leymeriella'' *''Liardites'' *''Liautaudia'' *''Libycoceras'' *''Lilloetia'' *''Limaites'' *''Linguaclymenia'' *''Linguatornoceras'' *''Lingyunites'' *''Lioceratoides'' *''Liosphinctes'' *''Liparoceras'' *''Lipuites'' *''Lissoceras'' *''Lissoceratoides'' *''Lissoclymenia'' *''Lissonia'' *''Lissonites'' *''Lithacoceras'' *''Lithacosphinctes'' *''Lithancylus'' *''Lobites'' *''Lobobactrites'' *''Lobokosmokeras'' *''Lobolytoceras'' *''Lobosphinctes'' *''Lobotornoceras'' *''Loczyceras'' *''Lomonossovella'' *''Longaeviceras'' *''Longobardites'' *''Longobarditoides'' *''Lopholobites'' *''Lorioloceras'' *''Lotzeites'' *''Ludwigia (ammonite), Ludwigia'' *''Hecticoceras, Lunuloceras'' *''Lupherites'' *''Luppovella'' *''Lusitanites'' *''Lycetticeras'' *''Lyelliceras'' *''Lyrogoniatites'' *''Lytheoceras'' *''Lyticoceras'' *''Lytoceras'' *''Lytocrioceras'' *''Lytodiscoides'' *''Lytogyroceras'' *''Lytohoplites''

M

Ma

*''Macrocephalites'' *''Macroscaphites'' *''Madagascarites'' *''Maenioceras'' *''Magharina'' *''Malayites'' *''Malladaites'' *''Malletophychites'' *''Maltoniceras'' *''Mammites'' *''Manambolites'' *''Mancosiceras'' *''Mangeroceras'' *''Manoloviceras'' *''Mantelliceras'' *''Manticoceras'' *''Manuaniceras'' *''Maorites'' *''Mapesites''Work, D.M. & D.R. Boardman 2003
''Mapesites'', a new Upper Pennsylvanian (Lower Virgilian) ammonoid from Kansas.
''Journal of Paleontology'' 77(6): 1195-1197. *''Marathonites'' *''Margaritropites'' *''Marianoceras'' *''Mariella'' *''Marshallites'' *''Martelites'' *''Martolites'' *''Masiaposites'' *''Masonites'' *''Maternoceras'' *''Mathoceras'' *''Mathoceratites'' *''Maximites'' *''Mayaites'' *''Mazapilites''

Me

*''Medlicottiinae, Medlicottia'' *''Meekoceras'' *''Megalytoceras'' *''Megaphyllites'' *''Megapronorites'' *''Megasphaeroceras'' *''Megatyloceras'' *''Meginoceras'' *''Melagathiceras'' *''Melchiorites'' *''Melonites'' *''Melvilloceras'' *''Menabites''

Me (cont.)

*''Menabonites'' *''Meneghiniceras'' *''Menuites'' *''Menuthiocrioceras'' *''Mercaticeras'' *''Merocanites'' *''Mescalites'' *''Mesobeloceras'' *''Mesocladiscites'' *''Mesoclymenia'' *''Mesodactylites'' *''Mesogaudryceras'' *''Mesopuzosia'' *''Mesosimoceras'' *''Mesoturrilites'' *''Metabactrites'' *''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'' *''Metrolytoceras'' *''Metussuria'' *''Mexicoceras''

Mi

*''Miccocephalites'' *''Michalskia'' *''Michiganites'' *''Micracanthoceras'' *''Microbactrites'' *''Microbiplices'' *''Microdactylites'' *''Microderoceras'' *''Micromphalites'' *''Microtropites'' *''Miklukhoceras'' *''Miltites'' *''Mimagoniatites'' *''Mimimitoceras'' *''Mimosphinctes'' *''Mirilentia'' *''Miroclymenia'' *''Mirojuvavites'' *''Mirosphinctes'' *''Mitonia'' *''Mixomanticoceras'' *''Miyakoceras''

Mo

*''Moffitites'' *''Mojsisovicsites'' *''Mojsisoviczia'' *''Mojsvarites'' *''Monacanthites'' *''Mongoloceras'' *''Monophyllites'' *''Moremanoceras'' *''Morphoceras'' *''Morrisiceras'' *''Morrowites'' *''Mortoniceras'' *''Moutoniceras''

Mu

*''Mucrodactylites'' *''Muensterites'' *''Muensteroceras'' *''Muniericeras''

My

*''Myloceras''

N

Na

*''Nairites'' *''Nannites'' *''Nannocardioceras'' *''Nannolytoceras'' *''Nannostephanus'' *''Nannovascoceras'' *''Nassichukites'' *''Nathorstites'' *''Nautellipsites''

Ne

*''Neancyloceras'' *''Nebraskites'' *''Nebrodites'' *''Negebites'' *''Nejdia'' *''Nelomites'' *''Neoaganides'' *''Neobibolites'' *''Neocardioceras'' *''Neochetoceras'' *''Neocladiscites'' *''Neoclypites'' *''Neocolumbites'' *''Neocomites'' *''Neocosmoceras'' *''Neocraspedites'' *''Neocrimites'' *''Neocrioceras'' *''Neodimorphoceras'' *''Neogastroplites'' *''Neogauthiericeras'' *''Medlicottiinae, Neogeoceras'' *''Neoglaphyrites'' *''Neoglyphioceras'' *''Neoglytoxoceras''

Ne (cont.)

*''Neogoniatites'' *''Neograhamites'' *''Neoharpoceras'' *''Neohimavatites'' *''Neohoploceras'' *''Neoicoceras'' *''Neokentoceras'' *''Neolioceratoides'' *''Neolissoceras'' *''Neolobites'' *''Neomantelliceras'' *''Neomanticoceras'' *''Neomicroceras'' *''Neomorphoceras'' *''Neopericyclus'' *''Neopharciceras'' *''Neophlycticeras'' *''Hypophylloceras, Neophylloceras'' *''Neopopanoceras'' *''Neopronorites'' *''Neoprotrachyceras'' *''Neoptychites'' *''Neopulchellia'' *''Neosaynoceras'' *''Neoselwynoceras'' *''Neoshumardites'' *''Neosilesites'' *''Neosirenites'' *''Neostlingoceras'' *''Neotibetites'' *''Uddenitinae, Neouddenites'' *''Neuqueniceras'' *''Nevadisculites'' *''Nevadites'' *''Nevadoceras'' *''Nevadophyllites'' *''Newboldiceras'' *''Newmarracarroceras''

Ni

*''Niceforoceras'' *''Nicklesia'' *''Nicomedites'' *''Nielsenoceras'' *''Nigericeras'' *''Nipponites'' *''Nitanoceras''

No

*''Nodiocoeloceras'' *''Nodosageceras'' *''Nodosoclymenia'' *''Nodosohoplites'' *''Nodotibetites'' *''Noetlingites'' *''Nolaniceras'' *''Nomismoceras'' *''Nordiceras'' *''Nordophiceras'' *''Noridiscites'' *''Norites'' *''Normannites'' *''Nostoceras'' *''Nothocephalites'' *''Nothosporadoceras'' *''Nothostephanus'' *''Notoceras'' *''Nowakites''

Nu

*''Nuculoceras'' *''Nummoceras''

O

*''Obrutchevites'' *''Obtusicostites'' *''Ochetoceras'' *''Ochotoceras'' *''Odontodiscoceras'' *''Oecoptychius'' *''Oecotraustes'' *''Oiophyllites'' *''Oistoceras'' *''Okribites'' *''Olcostephanus'' *''Olenekoceras'' *''Olenikites'' *''Onitshoceras'' *''Onychoceras'' *''Oosterella'' *''Ophiceras'' *''Ophilyroceras'' *''Oppelia'' *''Oraniceras'' *''Orestites'' *''Organoceras'' *''Orionoides'' *''Ornatoclymenia'' *''Orthaspidoceras'' *''Orthildaites'' *''Orthoceltites'' *''Orthogarantiana'' *''Orthosphinctes'' *''Orulganites'' *''Ostlingoceras'' *''Otoceltites'' *''Otoceras'' *''Otohoplites'' *''Otoites'' *''Otoscaphites'' *''Ovaticeras'' *''Owenites (ammonite), Owenites'' *''Owenoceras'' *''Oxintoceras'' *''Oxybeloceras'' *''Oxycerites'' *''Oxydiscites'' *''Oxylenticeras'' *''Oxynoticeras'' *''Oxyparoniceras'' *''Oxytornoceras'' *''Oxytropidoceras''

P

Pa

*''Pachycardioceras'' *''Pachyceras'' *''Pachyclymenia'' *''Pachydesmoceras'' *''Pachydiscoides'' *''Pachydiscus'' *''Pachyerymnoceras'' *''Pachylyroceras'' *''Pachylytoceras'' *''Pachypictonia'' *''Pachysphinctes'' *''Padagrosites'' *''Padragosiceras'' *''Palaeogoniatites'' *''Palaeokazachstanites'' *''Palaeophyllites'' *''Palermites'' *''Palicites'' *''Palnerostephanus'' *''Paltaopites'' *''Paltechioceras'' *''Pamphagosirenites'' *''Paprothites'' *''Paquiericeras'' *''Paraacrochordiceras'' *''Parabactrites'' *''Parabehavites'' *''Paraberriasella'' *''Parabevalites'' *''Paraboliceras'' *''Paraboliceratoides'' *''Paracadoceras'' *''Paracalycoceras'' *''Paracanthoplites'' *''Paraceltites'' *''Paraceratites'' *''Paraceratitoides'' *''Paracladiscites'' *''Paracochloceras'' *''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 (ammonite), Paralcidia'' *''Paralenticeras'' *''Paralobites'' *''Paralytoceras'' *''Paramammites'' *''Parammatoceras'' *''Paranannites'' *''Paranclyoceras'' *''Parandiceras'' *''Paranorites'' *''Paranoritoides'' *''Parapallasiceras'' *''Parapatoceras'' *''Parapeltoceras'' *''Paraperrinites'' *''Paraphyllites'' *''Parapinacoceras'' *''Paraplacites'' *''Parapopanoceras'' *''Parapronorites'' *''Parapuzosia'' *''Pararasenia'' *''Pararcestes'' *''Pararnioceras'' *''Parasageceras'' *''Parasaynoceras'' *''Paraschartymites'' *''Paraschistoceras'' *''Parashumardites'' *''Parasibirites'' *''Parasilesites'' *''Parasolenoceras'' *''Paraspidites'' *''Paraspidoceras'' *''Paraspiticeras'' *''Parastieria'' *''Parastrenoceras'' *''Parasturia'' *''Paratexanites'' *''Parathetidites'' *''Parathisbites'' *''Paratibites'' *''Paratirolites'' *''Paratissotia'' *''Paratorleyoceras'' *''Paratornoceras'' *''Paratrachyceras'' *''Paratropites'' *''Paraturrilites'' *''Paravirgatites'' *''Parawedekindia'' *''Parawocklumeria'' *''Parayakutoceras'' *''Parengonoceras'' *''Parentites'' *''Parinodiceras'' *''Parkinsonia (ammonite), Parkinsonia'' *''Parodiceras'' *''Parodontoceras'' *''Paroecotraustes'' *''Paroniceras'' *''Paroxynoticeras'' *''Partschiceras'' *''Parussuria'' *''Paryphoceras'' *''Pascoeites'' *''Paskentites'' *''Passendorferia'' *''Patagiosites'' *''Paulotropites'' *''Pavlovia'' *''Pavloviceras''

Pe

*''Pearylandites'' *''Pectinatites'' *''Pedioceras'' *''Peltoceras'' *''Peltoceratoides'' *''Peltolytoceras'' *''Peltomorphites'' *''Pennoceras'' *''Pentagonoceras'' *''Pericarinoceras'' *''Pericleites'' *''Pericyclus'' *''Peripleurites'' *''Perisphinctes'' *''Peritrochia'' *''Pernoceras'' *''Peroniceras'' *''Peronoceras''

Pe (cont.)

*''Perrinites'' *''Perrinoceras'' *''Pervinquieria'' *''Petitclercia'' *''Petranoceras'' *''Petrolytoceras'' *''Petteroceras'' *''Peytonoceras''

Ph

*''Phaneroceras'' *''Phanerostephanus'' *''Pharciceras'' *''Phaularpites'' *''Phaulostephanus'' *''Phaulozigzag'' *''Phillipites'' *''Phillipsoceras'' *''Phlycticeratinae, Phlycticeras'' *''Phlycticrioceras'' *''Phlyseogrammoceras'' *''Phoenixites'' *''Phormedites'' *''Phricodoceras'' *''Phylloceras'' *''Phyllocladiscites'' *''Phyllopachyceras'' *''Phylloptychoceras'' *''Phyllytoceras'' *''Phymatoceras'' *''Physematites'' *''Physeogrammoceras'' *''Physodoceras''

Pi

*''Picenia'' *''Pictetia (ammonite), Pictetia'' *''Pictonia'' *''Pimelites'' *''Pinaclymenia'' *''Pinacoceras'' *''Pinacoplacites'' *''Piriclymenia''

Pl

*''Placenticeras'' *''Placites'' *''Planammatoceras'' *''Planisphinctes'' *''Plasmatoceras'' *''Platotropites'' *''Platyclymenia'' *''Platycuccoceras'' *''Platygoniatites'' *''Platylenticeras'' *''Platynoticeras'' *''Platypleuroceras'' *''Playfordites'' *''Plesiacanthoceras'' *''Plesiacanthoides'' *''Plesiohamites'' *''Plesiospitidiscus'' *''Plesiotissotia'' *''Plesioturrilites'' *''Pleuroacanthites'' *''Macrocephalites, Pleurocephalites'' *''Pleuroceras (ammonite), Pleuroceras'' *''Pleurodistichites'' *''Pleurohoplites'' *''Pleurolytoceras'' *''Pleuronodoceras'' *''Pleuropinacoceras'' *''Pleurotexanites'' *''Pleydellia'' *''Plictetia''

Po

*''Poculisphinctes'' *''Poecilomorphus'' *''Polaricyclus'' *''Politoceras'' *''Polonites'' *''Polonoceras'' *''Polymorphites'' *''Polyplectites'' *''Polyplectus'' *''Polyptychites'' *''Polyptychoceras'' *''Polysphinctes'' *''Pomerania (ammonite), Pomerania'' *''Pompeckioceras'' *''Pompeckjites'' *''Ponteixites'' *''Ponticeras'' *''Popanites'' *''Popanoceras'' *''Poporites'' *''Porpoceras'' *''Postglatziella'' *''Posttornoceras''

Pr

*''Praebigotites'' *''Praedaraelites'' *''Praeglyphioceras'' *''Praemanambolites'' *''Praemeroceras'' *''Praemuniericeras'' *''Praeparkinsonia'' *''Praepolyplectus'' *''Praesphaeroceras'' *''Praestrigites'' *''Praetollia'' *''Pravitoceras'' *''Preflorianites'' *''Preflorianitoides'' *''Prenkites'' *''Preshumardites'' *''Presimoceras'' *''Pricella'' *''Prionites'' *''Prionoceras'' *''Prionocycloceras'' *''Prionocyclus'' *''Prionodoceras'' *''Proarcestes'' *''Proavites'' *''Probeloceras'' *''Procarnites'' *''Procerites'' *''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'' *''Promicroceras'' *''Proniceras''

Pr (cont.)

*''Pronoetlingites'' *''Pronorites'' *''Propectinatites'' *''Properisphinctes'' *''Properrinites'' *''Propinacoceras'' *''Proplacenticeras'' *''Proplanulites'' *''Propopanoceras'' *''Proptychites'' *''Proptychitoides'' *''Prorasenia'' *''Prorsisphinctes'' *''Prosaphites'' *''Proshumardites'' *''Prosiceras'' *''Prososphinctes'' *''Prososphinctoides'' *''Prosphingites'' *''Prostacheoceras'' *''Protacanthoceras'' *''Protacanthodiscus'' *''Protacanthoplites'' *''Protaconeceras'' *''Protactoclymenia'' *''Protanclyoceras'' *''Protanisoceras'' *''Protengonoceras'' *''Protetragonites'' *''Proteusites'' *''Protexanites'' *''Prothalassoceras'' *''Protimanites'' *''Protocanites'' *''Protoceras (ammonite), Protoceras'' *''Protoecotrausites'' *''Protogrammoceras'' *''Protohoplites'' *''Protophites'' *''Protoplatytes'' *''Protopopanoceras'' *''Protornoceras'' *''Protosageceras'' *''Protothurmannia'' *''Prototoceras'' *''Protoxyclymenia'' *''Protrachyceras'' *''Protropites'' *''Proturrilitoides'' *''Uddenitinae, Prouddenites'' *''Provirgatites''

Ps

*''Pseudacompsoceras'' *''Pseudaetomoceras'' *''Pseudagathiceras'' *''Pseudammatoceras'' *''Pseudargentiniceras'' *''Pseudarietites'' *''Pseudarisphinctes'' *''Pseudaspidites'' *''Pseudaspidoceras'' *''Pseudharpoceras'' *''Pseudhelicoceras'' *''Pseudhimalayites'' *''Pseudinvoluticeras'' *''Pseudoaganides'' *''Pseudoaspidoceras'' *''Pseudobactrites'' *''Pseudobaculites'' *''Pseudobarroisiceras'' *''Hecticoceras, Pseudobrightia'' *''Pseudocadoceras'' *''Pseudocalycoceras'' *''Pseudocardioceras'' *''Pseudocarnites'' *''Pseudoceltites'' *''Pseudoclambites'' *''Pseudoclydoniceras'' *''Pseudoclymenia'' *''Pseudocosmoceras'' *''Pseudodanubites'' *''Pseudofavrella'' *''Pseudoflemingites'' *''Pseudofoordites'' *''Pseudogarantiana'' *''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'' *''Pseudosirenites'' *''Pseudosonneratia'' *''Pseudothetidites'' *''Pseudothurmannia'' *''Pseudotibetites'' *''Pseudotirolites'' *''Pseudotissotia'' *''Pseudotoceras'' *''Pseudotoites'' *''Pseudotropites'' *''Pseudovidrioceras'' *''Pseudovirgatites'' *''Pseudowaagenia'' *''Pseudoxybeloceras'' *''Pseuduptonia'' *''Psiloceras'' *''Psilocladiscites'' *''Psilohamites'' *''Psilophyllites'' *''Psilosturia'' *''Psilotissotia''

Pt

*''Pterolytoceras'' *''Pteroscaphites'' *''Pterosirenites'' *''Ptycharcestes'' *''Ptychites'' *''Ptychoceras'' *''Ptycholytoceras'' *''Ptychophylloceras''

Pu

*''Puchenquia'' *''Puebloites'' *''Pulchellia'' *''Hecticoceras, Putealiceras'' *''Puzosia'' *''Puzosigella''

Q

*''Qiannanites'' *''Quasicravenoceras'' *''Quasintoceras'' *''Quenstedtoceras'' *''Quinnites'' *''Quitmannites''

R

*''Radstockiceras'' *''Raimondiceras'' *''Rakusites'' *''Ramosites'' *''Rasenia'' *''Rasenoides'' *''Raymondiceras'' *''Rectoclymenia'' *''Reesidites'' *''Rehmannia (ammonite), 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'' *''Roinghites'' *''Rollerites'' *''Rollieria'' *''Roloboceras'' *''Romaniceras'' *''Romanites'' *''Ropoloceras'' *''Rossalites'' *''Rotodiscoceras'' *''Rotopericyclus'' *''Rubroceras'' *''Rugiferites'' *''Rursiceras'' *''Rusoceras'' *''Ryugasella''

S

Sa

*''Sageceras'' *''Sagenites'' *''Saghalinites'' *''Sakhaites'' *''Sakmarites'' *''Salaziceras'' *''Salfeldiella'' *''Saltericeras'' *''Salterites'' *''Sandbergeroceras'' *''Sandlingites'' *''Sangzhites'' *''Sanmartinoceras'' *''Sanyangites'' *''Sarasinella'' *''Saxoceras'' *''Saynella'' *''Saynoceras''

Sc

*''Scalarites'' *''Scaphamites'' *''Scaphites'' *''Scaphitodites'' *''Scarburgiceras'' *''Schaffhauseria'' *''Schartymites'' *''Schindewolfites'' *''Schindewolfoceras'' *''Schistoceras'' *''Schistophylloceras'' *''Schloenbachia'' *''Schlotheimia'' *''Schuichengoceras'' *''Schwandorfia'' *''Sciponoceras'' *''Schizoclymenia'' *''Scoticardioceras''

Se

*''Sellaclymenia'' *''Sellagoniatites'' *''Sellanarcestes'' *''Selwynoceras'' *''Semenovites'' *''Semiformiceras'' *''Semiornites'' *''Serpianites'' *''Serramanticoceras'' *''Seymourites''

Sh

*''Shahrudites'' *''Shakraceras'' *''Shangraoceras'' *''Shaoyangoceras'' *''Sharpeiceras'' *''Shasticrioceras'' *''Shastoceras'' *''Shengoceras'' *''Shikhanites'' *''Shirbuirnia'' *''Shouchangoceras'' *''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'' *''Sirenites'' *''Sirenotrachyceras'' *''Sivajiceras'' *''Sizilites''

Sk

*''Skirroceras'' *''Skolekostephanus''

Sl

*''Slatterites''

So

*''Sobolewia'' *''Sohlites'' *''Sokolovites'' *''Solenoceras'' *''Solgerites'' *''Soliclymenia'' *''Somaliceras'' *''Somalites'' *''Somoholites'' *''Sonneratia (ammonite), Sonneratia'' *''Sonninia'' *''Sornayceras'' *''Sosioceras'' *''Sowerbyceras''

Sp

*''Spathiceras'' *''Spathites'' *''Speetoniceras'' *''Sphaeroceras'' *''Sphaerocladiscites'' *''Sphaerocoeloceras'' *''Sphaerodomites'' *''Sphaeromanticoceras'' *''Sphaeroptychius'' *''Sphenarpites'' *''Sphenoclymenia'' *''Sphenodiscus'' *''Sphingites'' *''Spinammatoceras'' *''Spinokosmoceras'' *''Spinoleiophyllites'' *''Spiroceras'' *''Spirogmoceras'' *''Spirolegoceras'' *''Spiticeras'' *''Spitidiscus'' *''Sporadoceras''

St

*''Stacheites'' *''Stacheoceras'' *''Stantonoceras'' *''Stantonites'' *''Staufenia'' *''Stegoxyites'' *''Stehnocephalites'' *''Steinmannites'' *''Stemmatoceras'' *''Stenarcestes'' *''Stenocadoceras'' *''Stenoclymenia'' *''Stenocyclus'' *''Stenoglaphyrites'' *''Stenopharciceras'' *''Stenopopanoceras'' *''Stenopronorites'' *''Stephanites''

St (cont.)

*''Stephanoceras'' *''Stikinoceras'' *''Stoliczkaia'' *''Stolleites'' *''Stomohamites'' *''Stoppaniceras'' *''Streblites'' *''Strebliticeras'' *''Strenoceras'' *''Striatosirenites'' *''Strigoceras'' *''Strigogoniatites'' *''Strungia'' *''Sturia'' *''Styracoceras'' *''Styrites''

Su

*''Subalpinites'' *''Subarcthoplites'' *''Subastieria'' *''Subbarroisiceras'' *''Subbonarellia'' *''Subcollina'' *''Subcolumbites'' *''Subcraspedites'' *''Subdichotomoceras'' *''Subgrossouvria'' *''Subinyoites'' *''Subitoceras'' *''Subkossmatia'' *''Sublithacoceras'' *''Hecticoceras, Sublunuloceras'' *''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''

Sv

*''Svalbardiceras'' *''Sverdrupites'' *''Svetlanoceras''

Sy

*''Sympolycyclus'' *''Synartinskia'' *''Syngastrioceras'' *''Synpharciceras'' *''Synuraloceras'' *''Synwocklumeria'' *''Medlicottiinae, Syrdenites''

T

Ta

*''Tabantalites'' *''Taffertia'' *''Talenticeras'' *''Tamarites'' *''Tapashanites'' *''Taramelliceras'' *''Tardeceras'' *''Tarrantoceras'' *''Taskanites'' *''Tauroceras (ammonite), Tauroceras''

Te

*''Tectiretites'' *''Tegoceras'' *''Teicherticeras'' *''Telermoceras'' *''Teloceras'' *''Telodactylites'' *''Telodactylus'' *''Temnoptychites'' *''Terektites'' *''Teshioites'' *''Tetragonites (syn. Epigoniceras)'' *''Tetrahoplites'' *''Tetrahoplitoides'' *''Tetraspidoceras'' *''Texanites'' *''Texoceras''

Th

*''Thallassoceras'' *''Thambites'' *''Thamboceras'' *''Thanamites'' *''Theganoceras'' *''Thetidites'' *''Thisbites'' *''Thomasites (ammonite), Thomasites'' *''Thomelites'' *''Thorsteinssonoceras'' *''Thraxites'' *''Thurmannia'' *''Thurmanniceras''

Ti

*''Tibetites'' *''Ticinites'' *''Tiltoniceras'' *''Timanites''

Ti (cont.)

*''Timanoceras'' *''Timorites'' *''Tirolites'' *''Tissotia'' *''Titanites'' *''Tithopeltoceras''

Tj

*''Tjururpites''

Tm

*''Tmaegoceras'' *''Tmaegophioceras'' *''Tmetoceras''

To

*''Tokurites'' *''Tollia (ammonite), Tollia'' *''Tolypeceras'' *''Tompophiceras'' *''Tongluceras'' *''Tongoboroceras'' *''Tonoceras'' *''Torcapella'' *''Toricellites'' *''Torleyoceras'' *''Tornia'' *''Tornoceras'' *''Tornquisites'' *''Tornquistites'' *''Torquatisphinctes'' *''Tovebirkelundites'' *''Toxamblyites'' *''Toxolioceras'' *''Tozerites''

Tr

*''Trachybaculites'' *''

'' *''Trachylytoceras'' *''Trachyphyllites'' *''Trachypleuraspidites'' *''Trachysagenites'' *''Trachyscaphites'' *''Trachystenoceras'' *''Tragodesmoceras'' *''Tragodesmoceroides'' *''Tragolytoceras''

Tr (cont.)

*''Tragophylloceras'' *''Tragorhacoceras'' *''Transicoeloceras'' *''Traskites'' *''Treptocceras'' *''Trettinoceras'' *''Triaclymenia'' *''Triagolytoceras'' *''Triainoceras'' *''Tridentites'' *''Trigonogastrioceras'' *''Trilobiticeras'' *''Trimanticoceras'' *''Trimarginia'' *''Trimarginites'' *''Triozites'' *''Tritropidoceras'' *''Trizonoceras'' *''Trochleiceras'' *''Trochoclymenia'' *''Trochoceras'' *''Trolliceras'' *''Tropaeum'' *''Tropiceltites'' *''Tropidoceras'' *''Tropigastrites'' *''Tropigymnites'' *''Tropites'' *''Tropitoides'' *''Truyolsoceras''

Ts

*''Tsvetkovites''

Tu

*''Tuberodiscoides'' *''Tugurites'' *''Tulites'' *''Tumaroceras'' *''Tumilites'' *''Tunesites'' *''Tunglanites'' *''Turrilites'' *''Turrilitoides''

Ty

*''Tympanoceras'' *''Tyrannites''

U

*''Uchtites'' *''Uddenitinae, Uddenites'' *''Uddenitinae, Uddenoceras'' *''Ugamites'' *''Uhligella'' *''Uhligia (cephalopod), Uhligia'' *''Uhligites'' *''Umbetoceras'' *''Umiaites'' *''Unipeltoceras'' *''Unquatornoceras'' *''Uptonia'' *''Urakawites'' *''Uraloceras'' *''Uraloclymenia'' *''Uralopronorites'' *''Ussuria'' *''Ussurites'' *''Utaturiceras''

V

*''Vacekia'' *''Valanginites'' *''Valdedorsella'' *''Valentolytoceras'' *''Vallites'' *''Vandaites'' *''Vascoceras'' *''Vavilovites'' *''Velebites'' *''Veleziceras'' *''Venezoliceras'' *''Verancoceras'' *''Vermiceras'' *''Vermisphinctes'' *''Verneuilites'' *''Vertebriceras'' *''Vertebrites'' *''Veveysiceras'' *''Vicininodiceras'' *''Vickohlerites'' *''Vidrioceras'' *''Villania (ammonite), Villania'' *''Vinalesites'' *''Vinalesphinctes'' *''Virgataxioceras'' *''Virgatites'' *''Virgatopavlovia'' *''Virgatosimoceras'' *''Virgatosphinctes'' *''Virgatospinctoides'' *''Vishnuites'' *''Voehringerites'' *''Vredenburgites''

W

*''Waagenina'' *''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'' *''Wrightoceras'' *''Wyomingites (ammonite), Wyomingites''

X

*''Xenoceltites'' *''Xenocephalites'' *''Xenodiscus'' *''Xenodrepanites'' *''Xipheroceras'' *''Xiphogymnites''

Y

*''Yabeiceras'' *''Yakounia'' *''Yakutoceras'' *''Yakutoglaphyrites'' *''Yangites'' *''Yezoites'' *''Yinoceras'' *''Yokoyamaceras''

Z

*''Zadelsdorfia'' *''Zaraiskites'' *''Zealandites'' *''Zemistephanus'' *''Zenoites'' *''Zenostephanus'' *''Zephyroceras'' *''Zetoceras'' *''Zigzagiceras'' *''Ziyunites'' *''Zonovia'' *''Zuercherella'' *''Zugodactylites'' *''Zugokosmoceras'' *''Zuluiceras'' *''Zuluscaphites'' *''Zurcherella'' *''Zurcheria''

References

Uncited genera names can be verified at: *Sepkoski, J.J. Jr. 2002. A compendium of fossil marine animal genera. ''Bulletins of American Paleontology'' 363: 1–560
Sepkoski's Online Genus Database

External links

The Paleobiology Database entry on "Ammonoidea"

Sepkoski's Online Genus Database entry on "Cephalopoda"
{{DEFAULTSORT:Ammonites Ammonite genera, Lists of prehistoric molluscs Lists of animal genera (alphabetic)