List of prehistoric nautiloid genera

The shell of a modern species of the genus Allonautilus (A. scrobiculatus).

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.

A

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

• †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
• Allonautilus
• †Allotrioceras
• †Allumettoceras
• †Almaloceras
• †Alpenoceras
• †Aluveroceras
• †Amphicyrtoceras

• †Amsleroceras
• †Anamesoceras
• †Anaspyroceras
• †Anastomoceras
• †Ancistroceras
• †Andreioceras
• †Anepheloceras
• †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

Nautilus macromphalus anatomy.

Allonautilus anatomy.

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

Interior of a Nautilus shell.

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
• †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
• †Diestoceras
• †Digenuoceras
• †Diodoceras
• †Diorugoceras
• †Discitoceras
• †Discoactinoceras
• †Discoceras

• †Discosorus
• †Dnestroceras
• †Doleroceras
• †Dolorthoceras
• †Domatoceras
• †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
• †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

Lituites fossil.

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

Orthoceras

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
• Nautilus
• †Nebroceras
• †Neobistrialites
• †Neoceras

• †Neocycloceras
• †Neocymatoceras
• †Neodiscosorus
• †Neodomatoceras
• †Neorthoceras
• †Neosichuanoceras
• †Nephriticeras
• †Nephriticerina

• †Neptunoceras
• †Neumatoceras
• †Nikenautilus
• †Nipageroceras
• †Nothoceras
• †Notocycloceras
• †Nucites
• †Nybyoceras

Nautilus vernuelli

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

Silurian Orthoceras fossil.

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
• †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

Paracenoceras (Middle Jurassic, Israel)

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

Nautilus pompilius anatomy.

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

References

• Uncited genera names can be attributed to Sepkoski (2002) : Sepkoski, J.J. Jr. 2002. A compendium of fossil marine animal genera. D.J. Jablonski & M.L. Foote (eds.). Bulletins of American Paleontology 363: 1–560. Sepkoski's Online Genus Database (CEPHALOPODA)