List of prehistoric nautiloid genera

This list of nautiloids is a comprehensive listing of all genera that have ever been included in the subclass Nautiloidea, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (nomina dubia), or were not formally published (nomina nuda), as well as junior synonyms of more established names, and genera that are no longer considered nautiloids.

Most of the listed genera are found in Part K of the Treatise on Invertebrate Paleontology. Some, added since the year of publication (1964) are found simply in various scientific journals and special publications. The named genera are based on type specimens which are housed in various museums and other academic institutions worldwide, available to interested researchers.

Note that Allonautilus and Nautilus are the only extant genera.

A

 * †Acanthonautilus
 * †Acaroceras
 * †Acleistoceras
 * †Acrosphaerorthoceras
 * †Actinoceras
 * †Actinomorpha
 * †Adamsoceras
 * †Adeloceras
 * †Adelphoceras
 * †Adnatoceras
 * †Aethiosolen
 * †Aethoceras
 * †Agrioceras
 * †Aigoceras
 * †Aipetoceras
 * †Aipoceras
 * †Akroceras
 * †Aktjubocheilus
 * †Alaskoceras
 * †Albertoceras
 * †Alethynoceras
 * †Aletoceras
 * †Alexandronautilus
 * †Allanoceras
 * †Alloceras
 * †Allotrioceras
 * †Allumettoceras
 * †Almaloceras
 * †Alpenoceras
 * †Aluveroceras
 * †Amphicyrtoceras
 * †Amsleroceras
 * †Anamesoceras
 * †Anaspyroceras
 * †Anastomoceras
 * †Ancistroceras
 * †Andreioceras
 * †Anepheloceras
 * †Angaroceras
 * †Angelinoceras
 * †Anglicornus
 * †Anglonautlis
 * †Anguloceras
 * †Anhuiceras
 * †Ankyloceras
 * †Annoceras
 * †Anomaloceras
 * †Anomeioceras
 * †Anonymoceras
 * †Anoploceras
 * †Antacaroceras
 * †Anthoceras
 * †Anthomorpha
 * †Antigyroceras
 * †Antiphragmoceras
 * †Antiplectoceras
 * †Antonoceras
 * †Aphelaeceras
 * †Aphetoceras
 * †Aphractus
 * †Aphragmites
 * †Aphyctoceras
 * †Apioceras
 * †Aploceras
 * †Apocrinoceras
 * †Apogonoceras
 * †Apsidoceras
 * †Archiacoceras
 * †Argocheilus
 * †Arionoceras
 * †Arkoceras
 * †Arkonoceras
 * †Armenoceras
 * †Arpaoceras
 * †Arterioceras
 * †Arthrophyllum
 * †Articheilus
 * †Asaphiceras
 * †Asbestoceras
 * †Ascoceras
 * †Askeatonolucidum
 * †Astoceras
 * †Asymptoceras
 * †Athanatoceras
 * †Atomoceras
 * †Atopoceras
 * †Aturia
 * †Aturoidea
 * †Augustoceras
 * †Aulaconautilus
 * †Aulametacoceras
 * †Austinoceras
 * †Avilionella
 * †Avoceras

B

 * †Bactroceras
 * †Badouceras
 * †Baeopleuroceras
 * †Bakeroceras
 * †Balashovia
 * †Balticoceras
 * †Baltoceras
 * †Bambusoceras
 * †Barnesoceras
 * †Barrandeoceras
 * †Bassleroceras
 * †Bastindoceras
 * †Bateroboceras
 * †Bathmoceras
 * †Baykonaroceras
 * †Beekmanoceras
 * †Belloceras
 * †Beloitoceras
 * †Bentoceras
 * †Bergoceras
 * †Bickmorites
 * †Bifoveoceras
 * †Billingsites
 * †Bistrialites
 * †Bitaunioceras
 * †Blakeoceras
 * †Blastocerina
 * †Bodieceras
 * †Bodoceras
 * †Bogoslovskya
 * †Bohemites
 * †Bolloceras
 * †Brachycycloceras
 * †Brachydomoceras
 * †Bradfordoceras
 * †Brevicoceras
 * †Bridgeoceras
 * †Brodekoceras
 * †Broeggeroceras
 * †Buchanoceras
 * †Buehleroceras
 * †Burenoceras
 * †Buttsoceras
 * †Byronoceras

C

 * †Calchasiceras
 * †Calhounoceras
 * †Callaionautilus
 * †Calocyrtoceras
 * †Cameroceras
 * †Campbelloceras
 * †Campendoceras
 * †Campyloceras
 * †Capriocornites
 * †Carbactinoceras
 * †Carinonautilus
 * †Carlloceras
 * †Carotites
 * †Cartersoceras
 * †Caseoceras
 * †Cassinoceras
 * †Casteroceras
 * †Catastroboceras
 * †Catoraphinoceras
 * †Catyrephoceras
 * †Cayogoceras
 * †Cayutoceras
 * †Cedarvilleoceras
 * †Celox
 * †Cenoceras
 * †Centroceras
 * †Centrocyrtoceras
 * †Centrocyrtocerina
 * †Centrolitoceras
 * †Centroonoceras
 * †Centrorizoceras
 * †Centrotarphyceras
 * †Chabactoceras
 * †Chadwickoceras
 * †Charactoceras
 * †Charactocerina
 * †Chazyoceras
 * †Chepuloceras
 * †Chicagooceras
 * †Chidleyenoceras
 * †Chisloceras
 * †Choanoceras
 * †Chouteauoceras
 * †Chrysoceras
 * †Chuticeras
 * †Cimonia
 * †Cinctoceras
 * †Clarkesvillia
 * †Clarkoceras
 * †Clathroceras
 * †Clelandoceras
 * †Cliftonoceras
 * †Clinoceras
 * †Clionyssiceras
 * †Clitendoceras
 * †Clydonautilus
 * †Clymenonautilus
 * †Clytoceras
 * †Cochlioceras
 * †Codoceras
 * †Coelocyrtoceras
 * †Coelogasteroceras
 * †Coloceras
 * †Columenoceras
 * †Comaroceras
 * †Condraoceras
 * †Conocerina
 * †Conostichoceras
 * †Conradoceras
 * †Cooperoceras
 * †Copiceras
 * †Coralloceras
 * †Corbuloceras
 * †Cornuella
 * †Corysoceras
 * †Cosmonautilus
 * †Cotteroceras
 * †Craftonoceras
 * †Cranoceras
 * †Crateroceras
 * †Cryptocycloceras
 * †Cryptorthoceras
 * †Ctenoceras
 * †Cumberloceras
 * †Cumingsoceras
 * †Curtoceras
 * †Cycloceras
 * †Cyclolituites
 * †Cyclopites
 * †Cycloplectoceras
 * †Cyclostomiceras
 * †Cymatoceras
 * †Cymatonautilus
 * †Cyrtactinoceras
 * †Cyrthoceratites
 * †Cyrtobaltoceras
 * †Cyrtoceras
 * †Cyrtoceratites
 * †Cyrtocerina
 * †Cyrtocheilus
 * †Cyrtogomphoceras
 * †Cyrtogomphus
 * †Cyrtonybyoceras
 * †Cyrtorizoceras
 * †Cyrtospyroceras
 * †Cyrtothoracoceras

D

 * †Dakeoceras
 * †Dalecarlioceras
 * †Danaoceras
 * †Danoceras
 * †Danzikoceras
 * †Dasbergoceras
 * †Dawsonoceras
 * †Dawsonocerina
 * †Deckeroceras
 * †Deiloceras
 * †Deinoceras
 * †Deiroceras
 * †Deltoceras
 * †Deltocymatoceras
 * †Deltoidonautilus
 * †Dentoceras
 * †Desioceras
 * †Devonocheilus
 * †Diademoceras
 * †Diagoceras
 * †Diaphoroceras
 * †Diastoloceras
 * †Dictyoceras
 * †Dideroceras
 * †Diestoceras
 * †Digenuoceras
 * †Diodoceras
 * †Diorugoceras
 * †Discitoceras
 * †Discoactinoceras
 * †Discoceras
 * †Discosorus
 * †Dnestroceras
 * †Doleroceras
 * †Dolorthoceras
 * †Domatoceras
 * †Donacoceras
 * †Dongshanoceras
 * †Dowlingoceras
 * †Drakonoceras
 * †Duerleyoceras
 * †Dunleithoceras
 * †Dwightoceras
 * †Dynatoceras
 * †Dyscritoceras
 * †Dzhinsetoceras

E

 * †Eburoceras
 * †Ecdyceras
 * †Ectenoceras
 * †Ectenolites
 * †Ectocycloceras
 * †Ectocyrtoceras
 * †Edaphoceras
 * †Edenoceras
 * †Ehlersoceras
 * †Eichwaldoceras
 * †Eifeloceras
 * †Ekwanoceras
 * †Elaphoceras
 * †Eldroceras
 * †Eleusoceras
 * †Elkanoceras
 * †Ellesmeroceras
 * †Ellinoceras
 * †Elpisoceras
 * †Elrodoceras
 * †Encoiloceras
 * †Endoceras
 * †Endocycloceras
 * †Endodiscosorus
 * †Endolobus
 * †Endoplanoceras
 * †Endoplectoceras
 * †Endorioceras
 * †Endostokesoceras
 * †Engorthoceras
 * †Enoploceras
 * †Entimoceras
 * †Eoclarkoceras
 * †Eocyckistomiceras
 * †Eocyrtoceras
 * †Eodiaphragmoceras
 * †Eoectenolites
 * †Eorizoceras
 * †Eosomichelinoceras
 * †Eothinoceras
 * †Eotrimeroceras
 * †Eotripteroceras
 * †Ephippioceras
 * †Ephippiorthoceras
 * †Epicymatoceras
 * †Epidomatoceras
 * †Epistroboceras
 * †Eremoceras
 * †Eridites
 * †Eskimoceras
 * †Esopoceras
 * †Estonioceras
 * †Euciphoceras
 * †Eucymatoceras
 * †Eudoceras
 * †Euloxoceras
 * †Euryrizoceras
 * †Eurystomites
 * †Eushantungoceras
 * †Eusthenoceras
 * †Eutrephoceras
 * †Evlanoceras
 * †Exochoceras
 * †Exocyrtoceras

F

 * †Faberoceras
 * †Fayettoceras
 * †Flowerites
 * †Floweroceras
 * †Foersteoceras
 * †Folioceras
 * †Foordiceras
 * †Franklinoceras
 * †Fremontoceras
 * †Fusicoceras

G

 * †Galtoceras
 * †Gangshanoceras
 * †Garryoceras
 * †Gasconsoceras
 * †Gaspocyrtoceras
 * †Geisonoceras
 * †Geisonocerina
 * †Geisonoceroides
 * †Geitonoceras
 * †Georgina
 * †Germanonautilus
 * †Glenisteroceras
 * †Glossoceras
 * †Glyptodendron
 * †Goldringia
 * †Gomphoceras
 * †Gonatocyrtoceras
 * †Gonioceras
 * †Gonionaedyceras
 * †Gonionautilus
 * †Gorbyoceras
 * †Gordonoceras
 * †Gorgonoceras
 * †Gouldoceras
 * †Graciloceras
 * †Graftonoceras
 * †Greenlandoceras
 * †Grimsbyoceras
 * †Grypoceras
 * †Gryponautilus
 * †Grzegorzewskia
 * †Guangyuanoceras
 * †Guangyuanoceroides
 * †Gyroceras
 * †Gyronaedyceras
 * †Gzheloceras

H



 * †Hadoceras
 * †Halloceras
 * †Hardmanoceras
 * †Harrisoceras
 * †Haruspex
 * †Haydenoceras
 * †Hebetoceras
 * †Hecatoceras
 * †Hedstroemoceras
 * †Helenites
 * †Heloceras
 * †Hemibeloitoceras
 * †Hemichoanella
 * †Hemicosmorthoceras
 * †Hemiliroceras
 * †Heminautilus
 * †Hemiphragmoceras
 * †Heracloceras
 * †Hercoceras
 * †Hercocyrtoceras
 * †Hercoglossa
 * †Hercoglossoceras
 * †Herkimeroceras
 * †Hesperoceras
 * †Hexagonites
 * †Hexameroceras
 * †Hindeoceras
 * †Hipparionoceras
 * †Hiregiroceras
 * †Hoeloceras
 * †Holconautilus
 * †Holmiceras
 * †Homaloceras
 * †Homoadelphoceras
 * †Huaiheceras
 * †Huanghuachangoceras
 * †Huiaihecerina
 * †Hunanoceras
 * †Hunyuenoceras
 * †Huronia
 * †Huroniella
 * †Hysteroceras

I

 * †Inclytoceras
 * †Indonautilus
 * †Inversoceras
 * †Iowoceras
 * †Irianoceras
 * †Irinites
 * †Isorthoceras

J

 * †Jangziceras
 * †Jaregoceras
 * †Jasperoceras
 * †Jiagouceras
 * †Joachimoceras
 * †Joldagiroceras
 * †Jolietoceras
 * †Jonesoceras
 * †Jovellania
 * †Juvavionautilus

K

 * †Kadaroceras
 * †Kallholnoceras
 * †Karadzharoceras
 * †Karoceras
 * †Katageioceras
 * †Kayoceras
 * †Kentlandoceras
 * †Keraiaceras
 * †Kiaeroceras
 * †Kijoceras
 * †Kyminoceras
 * †Kinaschukoceras
 * †Kindleoceras
 * †Kionoceras
 * †Kitatites
 * †Kladisoceras
 * †Knightoceras
 * †Kobyashiceras
 * †Kochoceras
 * †Konglungenoceras
 * †Kophinoceras
 * †Kosovoceras
 * †Kotelnyoceras
 * †Krykyloceras
 * †Kummeloceras
 * †Kummelonautilus
 * †Kundoceras
 * †Kyminoceras

L



 * †Lambeoceras
 * †Lamellorthoceras
 * †Landeroceras
 * †Laumontoceras
 * †Laureloceras
 * †Lavaloceras
 * †Lawrenceoceras
 * †Lechritrochoceras
 * †Leonardoceras
 * †Leuroceras
 * †Leurocycloceras
 * †Leurorthoceras
 * †Leurotrochoceras
 * †Levisoceras
 * †Librovitschiceras
 * †Linstroemoceras
 * †Liroceras
 * †Lispoceras
 * †Litoceras
 * †Litogyroceras
 * †Lituites
 * †Llanoceras
 * †Lobendoceras
 * †Loganoceras
 * †Lophoceras
 * †Lopingoceras
 * †Lorieroceras
 * †Lowoceras
 * †Loxoceras
 * †Lunanoceras
 * †Lychnoceras
 * †Lyckholmoceras
 * †Lyecoceras
 * †Lyrioceras
 * †Lysagoroceras
 * †Lysagoroceras

M



 * †Maccoyoceras
 * †Macrodomoceras
 * †Macroloxoceras
 * †Madiganella
 * †Maelonoceras
 * †Magdoceras
 * †Mahoningoceras
 * †Mandaloceras
 * †Manitoulinoceras
 * †Manjoceras
 * †Mariceras
 * †Mcqueenoceras
 * †Mecynoceras
 * †Megadisocosorus
 * †Megaglossoceras
 * †Megaloceras
 * †Meikeloceras
 * †Meitanoceras
 * †Meloceras
 * †Meniscoceras
 * †Menuthionautlis
 * †Mericoceras
 * †Mesaktoceras
 * †Mesnaquaceras
 * †Mesoceras
 * †Mesochasmoceras
 * †Metabaltoceras
 * †Metacoceras
 * †Metactinoceras
 * †Metaphragmoceras
 * †Metarizoceras
 * †Metarmenoceras
 * †Metaspyroceras
 * †Metastromatoceras
 * †Metephippiorthoceras
 * †Metrioceras
 * †Miamoceras
 * †Michelinoceras
 * †Microbaltoceras
 * †Micronoceras
 * †Millkoninckioceras
 * †Mimolychnoceras
 * †Minganoceras
 * †Mitorthoceras
 * †Mitroceras
 * †Mixosiphonoceras
 * †Mjandymoceras
 * †Mnemoceras
 * †Mojscaroceras
 * †Mongoceras
 * †Monocyrtoceras
 * †Monogonoceras
 * †Monomuchites
 * †Montyoceras
 * †Mooreoceras
 * †Moreauoceras
 * †Mosquoceras
 * †Mstikhinoceras
 * †Muiroceras
 * †Multicameroceras
 * †Murchisoniceras
 * †Muriceras
 * †Murrayoceras
 * †Myloceras
 * †Mysterioceras

N



 * †Naedyceras
 * †Najaceras
 * †Nanno
 * †Nassauoceras
 * †Nautiloceras
 * †Nebroceras
 * †Neobistrialites
 * †Neoceras
 * †Neocycloceras
 * †Neocymatoceras
 * †Neodiscosorus
 * †Neodomatoceras
 * †Neorthoceras
 * †Neosichuanoceras
 * †Nephriticeras
 * †Nephriticerina
 * †Neptunoceras
 * †Neumatoceras
 * †Nikenautilus
 * †Nipageroceras
 * †Nothoceras
 * †Notocycloceras
 * †Nucites
 * †Nybyoceras

O



 * †Octamerella
 * †Oelandoceras
 * †Offleyoceras
 * †Ogygoceras
 * †Ohioceras
 * †Oligoceras
 * †Oncoceras
 * †Oneotoceras
 * †Onyxites
 * †Oocerina
 * †Oonoceras
 * †Ophidioceras
 * †Ophioceras
 * †Ophionautilus
 * †Oratoceras
 * †Ordosoceras
 * †Ormoceras
 * †Orthoceras
 * †Orthocycloceras
 * †Orthonybyoceras
 * †Osbornoceras
 * †Ovoceras
 * †Ovocerina
 * †Oxfordoceras
 * †Oxygonioceras
 * †Oxynautilus

P



 * †Pachendoceras
 * †Pachtoceras
 * †Pakrioceras
 * †Palaeocycloceras
 * †Palaskensis
 * †Palelialia
 * †Palmeroceras
 * †Pancornus
 * †Pantoioceras
 * †Paquettoceras
 * †Paracenoceras
 * †Paracleistoceras
 * †Paraconradoceras
 * †Paractinoceras
 * †Paracyclostomiceras
 * †Paracymatoceras
 * †Paradakeoceras
 * †Paradiscoceras
 * †Paradnatoceras
 * †Paradomatoceras
 * †Parakionoceras
 * †Paraloxoceras
 * †Paramecynoceras
 * †Parametacoceras
 * †Paramooreoceras
 * †Paranautilus
 * †Parapalaeoceras
 * †Paraphragmites
 * †Paraplectronoceras
 * †Pararhiphaeoceras
 * †Pararineceras
 * †Parascoceras
 * †Parasphaerorthoceras
 * †Parastenopoceras
 * †Paratrematoceras
 * †Parawestonoceras
 * †Parevlanoceras
 * †Paroocerina
 * †Parormoceras
 * †Parryoceras
 * †Pectinoceras
 * †Peismoceras
 * †Pelagoceras
 * †Pentameroceras
 * †Perimecoceras
 * †Perioidanoceras
 * †Peripetoceras
 * †Permoceras
 * †Permodomatoceras
 * †Permonautilus
 * †Perunautilus
 * †Petryoceras
 * †Phacoceras
 * †Phaedrysmocheilus
 * †Phloioceras
 * †Phragmoceras
 * †Phragmocerina
 * †Phthanoncoceras
 * †Physioceras
 * †Pictetoceras
 * †Piersaloceras
 * †Pilotoceras
 * †Pionoceras
 * †Piratoceras
 * †Plagioceras
 * †Plagiostomoceras
 * †Planetoceras
 * †Platyconoceras
 * †Plectoceras
 * †Plectolites
 * †Pleuronautilus
 * †Pleuroncoceras
 * †Pleurorthoceras
 * †Plicatoceras
 * †Plummeroceras
 * †Podoliceras
 * †Polydesmia
 * †Polyelasmoceras
 * †Polygrammoceras
 * †Poterioceras
 * †Poteriocerina
 * †Potoceras
 * †Pristeroceras
 * †Probillingsites
 * †Proclydonautilus
 * †Procymatoceras
 * †Projovellania
 * †Proteoceras
 * †Proterocameroceras
 * †Proterovaginoceras
 * †Protobactrites
 * †Protocycloceras
 * †Protokionoceras
 * †Protophragmoceras
 * †Pselioceras
 * †Pseudactinoceras
 * †Pseudaganides
 * †Pseudancistroceras
 * †Pseudaturoidea
 * †Pseudendoceras
 * †Pseudobolloceras
 * †Pseudobrevicoceras
 * †Pseudocatastroboceras
 * †Pseudocenoceras
 * †Pseudocycloceras
 * †Pseudocyrtoceras
 * †Pseudogomphoceras
 * †Pseudokionoceras
 * †Pseudonautilus
 * †Pseudophacoceras
 * †Pseudophragmoceras
 * †Pseudorthoceras
 * †Pseudostenopoceras
 * †Pseudotemnocheilus
 * †Pseudotemperoceras
 * †Pseudotitanoceras
 * †Psiaoceras
 * †Ptenoceras
 * †Ptyssoceras
 * †Purmanarcoceras
 * †Pycnoceras
 * †Pyramidoceras
 * †Pythonoceras

Q

 * †Qiushougouceras
 * †Quebecoceras

R

 * †Radoceras
 * †Ramussenoceras
 * †Rangeroceras
 * †Raphanites
 * †Rasmussenoceras
 * †Rayonnoceras
 * †Rectseptoceras
 * †Redpathoceras
 * †Reedsoceras
 * †Reticycloceras
 * †Rhabdiferoceras
 * †Rhabdites
 * †Rhadinoceras
 * †Rhiphaeoceras
 * †Rhiphaeonautilus
 * †Rhipsites
 * †Rhomboceras
 * †Rhomboceras
 * †Rhynchoceras
 * †Rhynchorthoceras
 * †Richardsonoceras
 * †Rineceras
 * †Ringoceras
 * †Rioceras
 * †Rizoceras
 * †Robsonoceras
 * †Romingoceras
 * †Ropaloceras
 * †Roussanoffoceras
 * †Rudolfoceras
 * †Ruedemannoceras
 * †Ruthenoceras
 * †Rutoceras

S

 * †Sactoceras
 * †Sactorthoceras
 * †Saffordoceras
 * †Savageoceras
 * †Sceptrites
 * †Schroederoceras
 * †Schuchertoceras
 * †Scofieldoceras
 * †Scyphoceras
 * †Seelyoceras
 * †Selenoceras
 * †Selkirkoceras
 * †Shamattawaceras
 * †Shantungendoceras
 * †Shideleroceras
 * †Shikhanoceras
 * †Sholakoceras
 * †Shumardoceras
 * †Shuranoceras
 * †Siberioceras
 * †Siberionautilus
 * †Sibyllonautilus
 * †Sichuanaceras
 * †Sigmocycloceras
 * †Simardoceras
 * †Simorthoceras
 * †Simplicioceras
 * †Sinclairoceras
 * †Sinoceras
 * †Sinolebetoceras
 * †Slocomoceras
 * †Smileoceras
 * †Smithvilloceras
 * †Soakinautilus
 * †Solenochilus
 * †Somalinautilus
 * †Sophoceras
 * †Spanioceras
 * †Sphooceras
 * †Sphyradoceras
 * †Spondeioceras
 * †Spyroceras
 * †Stagonites
 * †Standardoceras
 * †Staufferoceras
 * †Stearoceras
 * †Stemtonoceras
 * †Stenogomphoceras
 * †Stenopoceras
 * †Stenzeloceras
 * †Stereoplasmoceras
 * †Stereospyroceras
 * †Stereotoceras
 * †Sthenoceras
 * †Stokesoceras
 * †Stolbovoceras
 * †Strandoceras
 * †Streptoceras
 * †Striacoceras
 * †Strionautilus
 * †Strobiloceras
 * †Stroboceras
 * †Stroggyloceras
 * †Stromatoceras
 * †Strophiceras
 * †Styrionautilus
 * †Subclymenia
 * †Subspyroceras
 * †Subvestinautilus
 * †Suttonoceras
 * †Sycoceras
 * †Synetoceras
 * †Syringoceras
 * †Syringonautilus
 * †Syrionautilus
 * †Syrreghmatoceras
 * †Systrophoceras

T

 * †Tainionautilus
 * †Tainoceras
 * †Tajaroceras
 * †Talattoceras
 * †Tambegiroceras
 * †Tanchiashanites
 * †Tanycameroceras
 * †Taoqupoceras
 * †Tarphyceras
 * †Tartaroceras
 * †Taskanoceras
 * †Taxyceras
 * †Teichertia
 * †Teichertoceras
 * †Temnocheilus
 * †Temperoceras
 * †Tetragonoceras
 * †Tetrameroceras
 * †Tetranodoceras
 * †Tetrapleuroceras
 * †Thaymastoceras
 * †Therioceras
 * †Theskeloceras
 * †Thoracoceras
 * †Threaroceras
 * †Thrincoceras
 * †Thuringionautilus
 * †Tienoceras
 * †Tirolonautilus
 * †Titanoceras
 * †Tithonoceras
 * †Tofangoceras
 * †Tomponautilus
 * †Torquatoceras
 * †Trachynautilus
 * †Tragoceras
 * †Trematoceras
 * †Trematodiscus
 * †Tretoceras
 * †Triboloceras
 * †Trigonoceras
 * †Trilacinoceras
 * †Trimeroceras
 * †Tripleuroceras
 * †Triplooceras
 * †Tripteroceras
 * †Tripterocerina
 * †Tripteroceroides
 * †Trispectes
 * †Tritonoceras
 * †Trochoceras
 * †Trochodictyoceras
 * †Trocholites
 * †Trocholitoceras
 * †Troedssonella
 * †Troedssonoceras
 * †Troostoceras
 * †Tshingizoceras
 * †Tubiferoceras
 * †Tumidoceras
 * †Tumidonautilus
 * †Tunguskoceras
 * †Turnoceras
 * †Turoceras
 * †Tuyloceras
 * †Tylodiscoceras
 * †Tylonautilus
 * †Tylorthoceras
 * †Tyrioceras

U

 * †Ukhtoceras
 * †Uloceras
 * †Ulrichoceras
 * †Umbeloceras
 * †Ungulites
 * †Uralorthoceras
 * †Uranoceras
 * †Urtasymoceras

V

 * †Valcouroceras
 * †Valhallites
 * †Valhalloceras
 * †Vasalemmoceras
 * †Vassaroceras
 * †Vaupelia
 * †Venatoroceras
 * †Veneficoceras
 * †Ventroloboceras
 * †Vericeras
 * †Verticoceras
 * †Vertorhizoceras
 * †Vespoceras
 * †Vestinautilus
 * †Virgaloceras
 * †Virgoceras

W

 * †Wadeoceras
 * †Walcottoceras
 * †Wardoceras
 * †Weberoceras
 * †Weishanhuceras
 * †Welleroceras
 * †Wellsoceras
 * †Westonoceras
 * †Whiteavesites
 * †Whitfieldoceras
 * †Wichitoceras
 * †Williamsoceras
 * †Wilsonoceras
 * †Winnipegoceras
 * †Wissenbachia
 * †Wolungoceras
 * †Woosteroceras
 * †Worthenoceras
 * †Wutinoceras

X

 * †Xainzanoceras
 * †Xenoceras
 * †Xenocheilus
 * †Xiaoshaoceras
 * †Xiphoceras

Y

 * †Yakutionautilus

Z

 * †Zeehanoceras
 * †Zerashanoceras
 * †Zhuibianoceras
 * †Zhuralevia
 * †Zittelloceras
 * †Zooceras