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''
*†'' 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''
*†''Tarphyceratidae, 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''
*†''Gen Georgina, Georgina''
*†''Germanonautilus''
*†''Glenisteroceras''
*†''Glossoceras''
*†''Glyptodendron''
*†''Goldringia''
*†''Gomphoceras''
*†''Gonatocyrtoceras''
*†''Gonioceras''
*†''Naedyceras Group, Gonionaedyceras''
*†''Gonionautilidae, Gonionautilus''
*†''Gorbyoceras''
*†''Gordonoceras''
*†''Lamellorthoceratidae, Gorgonoceras''
*†''Gouldoceras''
*†''Graciloceratidae, Graciloceras''
*†''Graftonoceras''
*†''Greenlandoceras''
*†''Grimsbyoceras''
*†''Grypoceras''
*†''Gryponautilus''
*†''Grzegorzewskia''
*†''Guangyuanoceras''
*†''Guangyuanoceroides''
*†''Gyroceras''
*†''Naedyceras Group, Gyronaedyceras''
*†''Gzheloceras''

H

*†''Tripteroceratidae, Hadoceras''
*†''Halloceras''
*†''Hardmanoceras''
*†''Harrisoceras''
*†''Haruspex (nautiloid), 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 (cephalopod), Huronia''
*†''Huroniella''
*†''Hysteroceras''

I

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

J

*†''Jangziceras''
*†''Jaregoceras''
*†''Trocholitidae, Jasperoceras''
*†''Jiagouceras''
*†''Joachimoceras''
*†''Joldagiroceras''
*†''Jolietoceras''
*†''Jonesoceras''
*†''Jovellania''
*†''Syringonautilidae, Juvavionautilus''

K

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

L

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

M

*†''Maccoyoceras''
*†''Macrodomoceras''
*†''Macroloxoceras''
*†''Reudemannoceratidae, Madiganella''
*†''Maelonoceras''
*†''Magdoceras''
*†''Mahoningoceras''
*†''Mandaloceratidae, Mandaloceras''
*†''Manitoulinoceras''
*†''Manjoceras''
*†''Mariceras''
*†''Mcqueenoceras''
*†''Mecynoceras''
*†''Megadisocosorus''
*†''Ephippioceratidae, 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''
*†''Tarphyceratidae, Moreauoceras''
*†''Mosquoceras''
*†''Mstikhinoceras''
*†''Muiroceras''
*†''Multicameroceras''
*†''Murchisoniceras''
*†''Muriceras''
*†''Murrayoceras''
*†''Myloceras''
*†''Mysterioceras''

N

*†''Naedyceras Group, Naedyceras''
*†''Najaceras''
*†''Nanno (cephalopod), Nanno''
*†''Nassauoceras''
*†''Nautiloceras''
*†''Nebroceras''
*†''Neobistrialites''
*†''Neoceras''
*†''Neocycloceras''
*†''Cymatoceras, Neocymatoceras''
*†''Neodiscosorus''
*†''Neodomatoceras''
*†''Neorthoceras''
*†''Neosichuanoceras''
*†''Nephriticeras''
*†''Nephriticerina''
*†''Neptunoceras''
*†''Neumatoceras''
*†''Nikenautilus''
*†''Nipageroceras''
*†''Nothoceras''
*†''Protocycloceratidae, Notocycloceras''
*†''Nucites''
*†''Nybyoceras''

O

*†''Octamerella''
*†''Oelandoceras''
*†''Offleyoceras''
*†''Ogygoceras''
*†''Ohioceras''
*†''Oligoceras (orthoceratoid), Oligoceras''
*†''Oncoceras''
*†''Oneotoceras''
*†''Onyxites''
*†''Slender Oncoceratidae, Oocerina''
*†''Slender Oncoceratidae, Oonoceras''
*†''Ophidioceras''
*†''Ophioceras''
*†''Ophionautilus''
*†''Oratoceras''
*†''Ordosoceras''
*†''Ormoceras''
*†''Orthoceras''
*†''Orthocycloceras''
*†''Orthonybyoceras''
*†''Osbornoceras''
*†''Ovoceras''
*†''Mandaloceratidae, Ovocerina''
*†''Oxfordoceras''
*†''Oxygonioceras''
*†''Syringonautilidae, Oxynautilus''

P

*†''Pachendoceras''
*†''Pachtoceras''
*†''Pakrioceras''
*†''Palaeocycloceras''
*†''Palaskensis''
*†''Pseudaganides, Palelialia''
*†''Palmeroceras''
*†''Pancornus''
*†''Pantoioceras''
*†''Paquettoceras''
*†''Paracenoceras''
*†''Paracleistoceras''
*†''Paraconradoceras''
*†''Paractinoceras''
*†''Paracyclostomiceras''
*†''Cymatoceras, Paracymatoceras''
*†''Paradakeoceras''
*†''Paradiscoceras''
*†''Paradnatoceras''
*†''Paradomatoceras''
*†''Parakionoceras''
*†''Paraloxoceras''
*†''Paramecynoceras''
*†''Parametacoceras''
*†''Paramooreoceras''
*†''Paranautilus''
*†''Parapalaeoceras''
*†''Paraphragmites''
*†''Paraplectronoceras''
*†''Pararhiphaeoceras''
*†''Pararineceras''
*†''Parascoceras''
*†''Parasphaerorthoceras''
*†''Parastenopoceras''
*†''Paratrematoceras''
*†''Parawestonoceras''
*†''Parevlanoceras''
*†''Slender Oncoceratidae, Paroocerina''
*†''Parormoceras''
*†''Parryoceras''
*†''Pectinoceras''
*†''Lechritrochoceratidae, Peismoceras''
*†''Pelagoceras''
*†''Pentameroceras''
*†''Perimecoceras''
*†''Perioidanoceras''
*†''Peripetoceras''
*†''Permoceras''
*†''Permodomatoceras''
*†''Permonautilus''
*†''Perunautilus''
*†''Petryoceras''
*†''Phacoceras''
*†''Phaedrysmocheilus''
*†''Phloioceras''
*†''Phragmoceratidae, Phragmoceras''
*†''Phragmoceratidae, Phragmocerina''
*†''Phthanoncoceras''
*†''Physioceras''
*†''Pictetoceras''
*†''Graciloceratidae, Piersaloceras''
*†''Tarphyceratidae, Pilotoceras''
*†''Tarphyceratidae, Pionoceras''
*†''Piratoceras''
*†''Plagioceras''
*†''Plagiostomoceras''
*†''Planetoceras''
*†''Platyconoceras''
*†''Plectoceras''
*†''Plectolites''
*†''Pleuronautilus''
*†''Pleuroncoceras''
*†''Pleurorthoceras''
*†''Plicatoceras''
*†''Plummeroceras''
*†''Podoliceras''
*†''Polydesmiidae, Polydesmia''
*†''Polyelasmoceras''
*†''Polygrammoceras''
*†''Poterioceras''
*†''Poteriocerina''
*†''Potoceras''
*†''Phragmoceratidae, Pristeroceras''
*†''Probillingsites''
*†''Proclydonautilus''
*†''Procymatoceras''
*†''Projovellania''
*†''Proteoceras''
*†''Proterocameroceras''
*†''Proterovaginoceras''
*†''Protobactrites''
*†''Protocycloceratidae, Protocycloceras''
*†''Protokionoceras''
*†''phragmoceratidae, Protophragmoceras''
*†''Pselioceras''
*†''Pseudactinoceras''
*†''Pseudaganides''
*†''Pseudancistroceras''
*†''Pseudaturoidea''
*†''Pseudendoceras''
*†''Pseudobolloceras''
*†''Pseudobrevicoceras''
*†''Pseudocatastroboceras''
*†''Pseudocenoceras''
*†''Pseudocycloceras''
*†''Pseudocyrtoceras''
*†''Mandaloceratidae, 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''
*†''Tripteroceratidae, Rasmussenoceras''
*†''Rayonnoceras''
*†''Rectseptoceras''
*†''Redpathoceras''
*†''Reedsoceras''
*†''Reticycloceras''
*†''Rhabdiferoceras''
*†''Rhabdites''
*†''Rhadinoceras''
*†''Rhiphaeoceras''
*†''Rhiphaeonautilus''
*†''Rhipsites''
*†''Rhomboceras''
*†''Rhomboceras''
*†''Rhynchoceras''
*†''Rhynchorthoceras''
*†''Slender Oncoceratidae, Richardsonoceras''
*†''Rineceras''
*†''Graciloceratidae, Ringoceras''
*†''Rioceras''
*†''Rizoceras''
*†''Robsonoceras''
*†''Slender Oncoceratidae, Romingoceras''
*†''Ropaloceras''
*†''Roussanoffoceras''
*†''Protocycloceratidae, Rudolfoceras''
*†''Reudemannoceratidae, Ruedemannoceras''
*†''Ruthenoceras''
*†''Rutoceras''

S

*†''Sactoceras''
*†''Sactorthoceras''
*†''Saffordoceras''
*†''Savageoceras''
*†''Sceptrites''
*†''Schroederoceras''
*†''Schuchertoceras''
*†''Scofieldoceras''
*†''Scyphoceras''
*†''Tarphyceratidae, 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''
*†''Manitoulinoceras, Staufferoceras''
*†''Stearoceras''
*†''Stemtonoceras''
*†''Stenogomphoceras''
*†''Stenopoceras''
*†''Stenzeloceras''
*†''Stereoplasmoceras''
*†''Stereospyroceras''
*†''Stereotoceras''
*†''Phragmoceratidae, Sthenoceras''
*†''Stokesoceras''
*†''Stolbovoceras''
*†''Strandoceras''
*†''Streptoceras''
*†''Striacoceras''
*†''Strionautilus''
*†''Strobiloceras''
*†''Stroboceras''
*†''Stroggyloceras''
*†''Stromatoceras''
*†''Strophiceras''
*†''Styrionautilus''
*†''Subclymenia''
*†''Subspyroceras''
*†''Subvestinautilus''
*†''Suttonoceras''
*†''Sycoceras''
*†''Synetoceras''
*†''Syringonautilidae, Syringoceras''
*†''Syringonautilidae, Syringonautilus''
*†''Syrionautilus''
*†''Syrreghmatoceras''
*†''Lechritrochoceratidae, 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''
*†''Tripteroceratidae, Tripteroceras''
*†''Tripteroceratidae, Tripterocerina''
*†''Tripteroceroides''
*†''Trispectes''
*†''Tritonoceras''
*†''Trochoceras''
*†''Lechritrochoceratidae, Trochodictyoceras''
*†''Trocholites''
*†''Trocholitidae, Trocholitoceras''
*†''Troedssonella''
*†''Troedssonoceras''
*†''Troostoceras''
*†''Tshingizoceras''
*†''Phragmoceratidae, Tubiferoceras''
*†''Tumidoceras''
*†''Tumidonautilus''
*†''Tunguskoceras''
*†''Turnoceras''
*†''Turoceras''
*†''Lowoceratidae, Tuyloceras''
*†''Tylodiscoceras''
*†''Tylonautilus''
*†''Tylorthoceras''
*†''Tyrioceras''

U

*†''Ukhtoceras''
*†''Uloceras''
*†''Ulrichoceras''
*†''Mandaloceratidae, Umbeloceras''
*†''Ungulites''
*†''Uralorthoceras''
*†''Uranoceras''
*†''Urtasymoceras''

V

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

W

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

X

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

Y

*†''Yakutionautilus''

Z

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

References

* Uncited genera names can be attributed to Sepkoski (2002)
*

Sepkoski's Online Genus Database (CEPHALOPODA)

{{DEFAULTSORT:Nautiloids
Prehistoric nautiloid genera, List of
Lists of prehistoric molluscs
Lists of animal genera (alphabetic)