# 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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †Faberoceras
* †Fayettoceras
* †Flowerites
* †Floweroceras
* †Foersteoceras
* †Folioceras
* †Foordiceras
* †Franklinoceras
* †Fremontoceras
* †Fusicoceras

## G

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †Inclytoceras
* †Indonautilus
* †Inversoceras
* †Iowoceras
* †Irianoceras
* †Irinites
* †Isorthoceras

## J

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †Jangziceras
* †Jaregoceras
* †Jasperoceras
* †Jiagouceras
* †Joachimoceras
* †Joldagiroceras
* †Jolietoceras
* †Jonesoceras
* †Jovellania
* †Juvavionautilus

## K

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †Qiushougouceras
* †Quebecoceras

## R

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †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

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †Ukhtoceras
* †Uloceras
* †Ulrichoceras
* †Umbeloceras
* †Ungulites
* †Uralorthoceras
* †Uranoceras
* †Urtasymoceras

## V

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †Valcouroceras
* †Valhallites
* †Valhalloceras
* †Vasalemmoceras
* †Vassaroceras
* †Vaupelia
* †Venatoroceras
* †Veneficoceras
* †Ventroloboceras
* †Vericeras
* †Verticoceras
* †Vertorhizoceras
* †Vespoceras
* †Vestinautilus
* †Virgaloceras
* †Virgoceras

## W

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †Wadeoceras
* †Walcottoceras
* †Wardoceras
* †Weberoceras
* †Weishanhuceras
* †Welleroceras
* †Wellsoceras
* †Westonoceras
* †Whiteavesites
* †Whitfieldoceras
* †Wichitoceras
* †Williamsoceras
* †Wilsonoceras
* †Winnipegoceras
* †Wissenbachia
* †Wolungoceras
* †Woosteroceras
* †Worthenoceras
* †Wutinoceras

## X

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †Xainzanoceras
* †Xenoceras
* †Xenocheilus
* †Xiaoshaoceras
* †Xiphoceras

## Y

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †Yakutionautilus

## Z

| Contents: | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also |
* †Zeehanoceras
* †Zerashanoceras
* †Zhuibianoceras
* †Zhuralevia
* †Zittelloceras
* †Zooceras