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IRMNG name details

Mollusca (awaiting allocation)

103222  (urn:lsid:irmng.org:taxname:103222)

temporary name
Family
Genus Arytene Oken, 1815
Genus Phrygula Yang, Steiner, Li & Keupp, 2014 †
Genus Tergipes Risso, 1818

Genus Abretia Rafinesque, 1814 (nomen nudum)
Genus Acardia Berthold in Latreille, 1827 (nomen nudum)
Genus Acmetrigonostoma Paetel, 1875 (nomen nudum)
Genus Actinota Hartmann, 1840 (nomen nudum)
Genus Adontophoria Benson, 1928 (nomen nudum)
Genus Aegaea Oppenheim, 1890 † (nomen nudum)
Genus Aeolica Scudder, 1882 (nomen nudum)
Genus Afrorhytida Möllendorff, 1903 (nomen nudum)
Genus Agamus Oken, 1815 (nomen nudum)
Genus Agenor Rafinesque, 1815 (nomen nudum)
Genus Algoa Gray, 1840 (nomen nudum)
Genus Amathonta Rafinesque, 1815 (nomen nudum)
Genus Amithaon Rafinesque, 1815 (nomen nudum)
Genus Amphicoela Scudder, 1882 (nomen nudum)
Genus Amphirea Rafinesque, 1815 (nomen nudum)
Genus Amphrisus Rafinesque, 1815 (nomen nudum)
Genus Anodea Scudder, 1882 (nomen nudum)
Genus Anthiope Rafinesque, 1815 (nomen nudum)
Genus Anthracoptera Salter, 1862 † (nomen nudum)
Genus Anthracosia King, 1844 (nomen nudum)
Genus Anthronacus Rafinesque, 1815 (nomen nudum)
Genus Aplodon Rafinesque, 1818 (nomen nudum)
Genus Aplodona Rafinesque, 1815 (nomen nudum)
Genus Apocerotus Scudder, 1882 (nomen nudum)
Genus Arcuatula Mazzo, 1939 (nomen nudum)
Genus Argivora Lesueur in de Blainville, 1825 (nomen nudum)
Genus Artemon Megerle (nomen nudum)
Genus Asphalium Rafinesque, 1815 (nomen nudum)
Genus Astrodonta Hartmann, 1840 (nomen nudum)
Genus Aulisa Rafinesque, 1815 (nomen nudum)
Genus Aviculina Dubois de Montpéreux, 1837 † (nomen nudum)
Genus Azar Gray, 1840 (nomen nudum)
Genus Babinula Haber, 1932 † (nomen nudum)
Genus Bacchidium Scudder, 1882 (nomen nudum)
Genus Bambanagites Mojsisovics, 1896 † (nomen nudum)
Genus Bathyamussium Oyama in Kuroda, 1951 (nomen nudum)
Genus Billingsia Walcott, 1886 † (nomen nudum)
Genus Botellus Spix & Martius, 1823 (nomen nudum)
Genus Brachydonta Schlüter, 1838 (nomen nudum)
Genus Brandaris Rafinesque, 1815 (nomen nudum)
Genus Braziera Brazier, 1883 (nomen nudum)
Genus Brusinofuchsia Dybowski & Grochmalicki, 1917 (nomen nudum)
Genus Calliconites Schwetzoff, 1913 † (nomen nudum)
Genus Callunea Scudder, 1882 (nomen nudum)
Genus Campytus Rafinesque, 1815 (nomen nudum)
Genus Canaria Scudder, 1882 (nomen nudum)
Genus Cannabina Gray, 1840 (nomen nudum)
Genus Cantharus Scudder, 1882 (nomen nudum)
Genus Carolluta Iredale, 1937 (nomen nudum)
Genus Cassiope Paetel, 1875 (nomen nudum)
Genus Catubrinia Caneva, 1906 † (nomen nudum)
Genus Ceramus Rafinesque, 1815 (nomen nudum)
Genus Cespitana Fagot, 1884 (nomen nudum)
Genus Chamaeleon Scudder, 1882 (nomen nudum)
Genus Chambardia Bourguignat, 1881 (nomen nudum)
Genus Chiapasia Müllerried, 1933 † (nomen nudum)
Genus Chilodon Ehrenberg, 1831 (nomen nudum)
Genus Chitoniscus Dall, 1878 (nomen nudum)
Genus Choaniceras Lindström, 1888 † (nomen nudum)
Genus Cladophora Gray, 1840 (nomen nudum)
Genus Claudena Iredale, 1941 (nomen nudum)
Genus Claudettea Iredale, 1941 (nomen nudum)
Genus Closterita Rafinesque, 1815 (nomen nudum)
Genus Conispira Rafinesque, 1815 (nomen nudum)
Genus Corneoxesta Iredale, 1941 (nomen nudum)
Genus Cornetia Munier-Chalmas, 1884 (nomen nudum)
Genus Costacylmenia Schmidt, 1921 † (nomen nudum)
Genus Costularia Scudder, 1882 (nomen nudum)
Genus Crassilabrum Scudder, 1882 (nomen nudum)
Genus Crenellodon Newton, 1891 (nomen nudum)
Genus Cruentata Scudder, 1882 (nomen nudum)
Genus Cteniurus Rafinesque, 1815 (nomen nudum)
Genus Cucurbita Scudder, 1882 (nomen nudum)
Genus Cufaea Leach, 1847 (nomen nudum)
Genus Culana Gray, 1840 (nomen nudum)
Genus Cuveriana Hoeninghaus, 1830 † (nomen nudum)
Genus Cyclostrea Gentil, 1902 † (nomen nudum)
Genus Cydippa Rafinesque, 1815 (nomen nudum)
Genus Cylindrellina Munier-Chalmas, 1884 (nomen nudum)
Genus Cylindulus Rafinesque, 1815 (nomen nudum)
Genus Cymbium Rafinesque, 1815 (nomen nudum)
Genus Cynodonta Gray, 1840 (nomen nudum)
Genus Cyphona Scudder, 1882 (nomen nudum)
Genus Cyrtodaria Cuvier, 1800 (nomen nudum)
Genus Cyrtolites Gray, 1840 (nomen nudum)
Genus Cytonotus Rafinesque, 1815 (nomen nudum)
Genus Dactylium Scudder, 1882 (nomen nudum)
Genus Dactylophora Scudder, 1882 (nomen nudum)
Genus Dactylus Meuschen, 1766 (nomen nudum)
Genus Dasanus Rafinesque, 1815 (nomen nudum)
Genus Dawsonia Dall, 1879 (nomen nudum)
Genus Delogyra Agassiz, 1845 (nomen nudum)
Genus Deloplecta Agassiz, 1845 (nomen nudum)
Genus Dimorpha Gray, 1840 (nomen nudum)
Genus Diomphala Rafinesque, 1815 (nomen nudum)
Genus Dontostoma Hartmann, 1840 (nomen nudum)
Genus Dyctiethis Rafinesque, 1815 (nomen nudum)
Genus Dymya Rouault, 1850 † (nomen nudum)
Genus Eburnea Renier, 1804 (nomen nudum)
Genus Elatia Megerle (nomen nudum)
Genus Elea Scudder, 1882 (nomen nudum)
Genus Eledon Oken, 1817 (nomen nudum)
Genus Eligmope Dennant, 1889 (nomen nudum)
Genus Elongatiana Locard, 1890 (nomen nudum)
Genus Eltrostoma Rafinesque, 1815 (nomen nudum)
Genus Endostropha Agassiz, 1845 (nomen nudum)
Genus Endotoma Rafinesque, 1818 (nomen nudum)
Genus Enipeus Rafinesque, 1815 (nomen nudum)
Genus Eocantharus Clark, 1938 † (nomen nudum)
Genus Eparnioceras Spath, 1922 † (nomen nudum)
Genus Eparnioceras Spath, 1923 † (nomen nudum)
Genus Epidromis (nomen nudum)
Genus Epitonium Scudder, 1882 (nomen nudum)
Genus Esmia Leach, 1847 (nomen nudum)
Genus Ettemona Iredale, 1941 (nomen nudum)
Genus Eumeles Scudder, 1882 (nomen nudum)
Genus Euphemus Rafinesque, 1815 (nomen nudum)
Genus Eurystoma Rafinesque, 1818 (nomen nudum)
Genus Exiliberus Iredale, 1942 (nomen nudum)
Genus Fascelis Agassiz, 1845 (nomen nudum)
Genus Femorale Scudder, 1882 (nomen nudum)
Genus Ferricolaria Scudder, 1882 (nomen nudum)
Genus Fimbriola Scudder, 1882 (nomen nudum)
Genus Foibalia Stache, 1880 † (nomen nudum)
Genus Frechiceras Krafft, 1902 † (nomen nudum)
Genus Fusula Scudder, 1882 (nomen nudum)
Genus Gaffraria Scudder, 1882 (nomen nudum)
Genus Galerita Rafinesque, 1815 (nomen nudum)
Genus Gallodema Iredale, 1941 (nomen nudum)
Genus Gallus Scudder, 1882 (nomen nudum)
Genus Garantiana Hyatt in Eastman-Zittel, 1900 † (nomen nudum)
Genus Gibbium Gray, 1840 (nomen nudum)
Genus Ginorga Gray, 1840 (nomen nudum)
Genus Glabrella Scudder, 1882 (nomen nudum)
Genus Glandula Scudder, 1882 (nomen nudum)
Genus Gomphoceratites d'Archiac & de Verneuil, 1842 † (nomen nudum)
Genus Gomphodelis Rafinesque, 1815 (nomen nudum)
Genus Goniogyra Agassiz, 1845 (nomen nudum)
Genus Gonomya Agassiz, 1838 (nomen nudum)
Genus Guetera Gray, 1840 (nomen nudum)
Genus Guildingia Dall, 1882 (nomen nudum)
Genus Gypsus Paetel, 1875 (nomen nudum)
Genus Haustorium Scudder, 1882 (nomen nudum)
Genus Helicophora Gray, 1840 (nomen nudum)
Genus Hemicrypta Agassiz, 1845 (nomen nudum)
Genus Hercodonta Agassiz, 1845 (nomen nudum)
Genus Hercynia Rafinesque, 1815 (nomen nudum)
Genus Heterodon Gray, 1840 (nomen nudum)
Genus Hipponea Rafinesque, 1815 (nomen nudum)
Genus Hippothoe Rafinesque, 1815 (nomen nudum)
Genus Homogyra Agassiz, 1845 (nomen nudum)
Genus Hoploancyloceras Nowak, 1913 † (nomen nudum)
Genus Huanghoceras Wang, 1922 † (nomen nudum)
Genus Hybogyra Agassiz, 1845 (nomen nudum)
Genus Hybopleura Agassiz, 1845 (nomen nudum)
Genus Hypacria Agassiz, 1845 (nomen nudum)
Genus Hyplaxus Rafinesque, 1815 (nomen nudum)
Genus Hystrionica Scudder, 1882 (nomen nudum)
Genus Ida Jay, 1836 (nomen nudum)
Genus Inflatulum Carpenter, 1857 (nomen nudum)
Genus Iodes Leach, 1847 (nomen nudum)
Genus Isognostoma Hartmann, 1840 (nomen nudum)
Genus Isoperia Scudder, 1882 (nomen nudum)
Genus Johnstonia Jay, 1850 (nomen nudum)
Genus Juturna Rafinesque, 1815 (nomen nudum)
Genus Kanilla Sowerby in Silvertop, 1833 (nomen nudum)
Genus Krynickia Kaleniczenko, 1839 (nomen nudum)
Genus Kubanoceras Kakhadze & Zesashvili, 1955 † (nomen nudum)
Genus Labialia Scudder, 1882 (nomen nudum)
Genus Lamberticeras Kilian, 1910 (nomen nudum)
Genus Lancinula Scudder, 1882 (nomen nudum)
Genus Laphyra Rafinesque, 1815 (nomen nudum)
Genus Lazarus Cuvier, 1800 (nomen nudum)
Genus Lecanomphalus Agassiz, 1845 (nomen nudum)
Genus Legrandia Hanley, 1872 (nomen nudum)
Genus Lenia Martin, 1828 † (nomen nudum)
Genus Licarea Gray, 1840 (nomen nudum)
Genus Lichas Gray, 1840 (nomen nudum)
Genus Lignaria Rafinesque, 1815 (nomen nudum)
Genus Limicias Rafinesque, 1815 (nomen nudum)
Genus Liotiaxis Iredale, 1936 (nomen nudum)
Genus Lithocarda Rafinesque, 1815 (nomen nudum)
Genus Lithocardiopsis Munier-Chalmas, 1891 † (nomen nudum)
Genus Lomastoma Hartmann, 1840 (nomen nudum)
Genus Loxota Agassiz, 1845 (nomen nudum)
Genus Luhuana Scudder, 1882 (nomen nudum)
Genus Lunatica Scudder, 1882 (nomen nudum)
Genus Lymnia Agassiz, 1845 (nomen nudum)
Genus Macrota Agassiz, 1845 (nomen nudum)
Genus Magula Scudder, 1882 (nomen nudum)
Genus Margaritites Agassiz, 1845 (nomen nudum)
Genus Marisca Gray, 1840 (nomen nudum)
Genus Medistoma Iredale, 1941 (nomen nudum)
Genus Melabrina Stache, 1880 † (nomen nudum)
Genus Melanites Rafinesque, 1818 (nomen nudum)
Genus Mendranoiana Caziot, 1910 (nomen nudum)
Genus Mentula Paetel, 1875 (nomen nudum)
Genus Mesonotus Rafinesque, 1815 (nomen nudum)
Genus Mesypea Rafinesque, 1815 (nomen nudum)
Genus Minacispira Iredale, 1941 (nomen nudum)
Genus Minaretus Scudder, 1882 (nomen nudum)
Genus Mingeria Gray, 1847 (nomen nudum)
Genus Mirana Scudder, 1882 (nomen nudum)
Genus Misile Scudder, 1882 (nomen nudum)
Genus Missioclivus Iredale, 1941 (nomen nudum)
Genus Modulus Scudder, 1882 (nomen nudum)
Genus Monocanthus Scudder, 1882 (nomen nudum)
Genus Morum Scudder, 1882 (nomen nudum)
Genus Namnia Children, 1840 (nomen nudum)
Genus Nauticaria Scudder, 1882 (nomen nudum)
Genus Nauticon Rafinesque, 1815 (nomen nudum)
Genus Nectia Gray, 1840 (nomen nudum)
Genus Neoshumardites Elias, 1937 (nomen nudum)
Genus Neposiella El-din Mahmoud, 1952 † (nomen nudum)
Genus Nereus Rafinesque, 1815 (nomen nudum)
Genus Neumayria Stefani, 1876 (nomen nudum)
Genus Nicteis Rafinesque, 1815 (nomen nudum)
Genus Niomia Gray, 1840 (nomen nudum)
Genus Nodularia Scudder, 1882 (nomen nudum)
Genus Notoptycha Agassiz, 1845 (nomen nudum)
Genus Numisea Rafinesque, 1815 (nomen nudum)
Genus Obbinula Stache, 1880 † (nomen nudum)
Genus Obeliscus Agassiz, 1845 (nomen nudum)
Genus Oblicitus Rafinesque, 1815 (nomen nudum)
Genus Oblongites Rafinesque, 1815 (nomen nudum)
Genus Obvoluta Scudder, 1882 (nomen nudum)
Genus Odontostylus Gray, 1840 (nomen nudum)
Genus Odorthus Rafinesque, 1815 (nomen nudum)
Genus Oebalus Rafinesque, 1815 (nomen nudum)
Genus Okenia Leuckart in Bronn, 1826 (nomen nudum)
Genus Omalota Scudder, 1882 (nomen nudum)
Genus Omphala Scudder, 1882 (nomen nudum)
Genus Omphaloploce Agassiz, 1845 (nomen nudum)
Genus Oncus Paetel, 1875 (nomen nudum)
Genus Onychina Scudder, 1882 (nomen nudum)
Genus Ophidermis Agassiz, 1845 (nomen nudum)
Genus Ophilites Roulland, 1831 † (nomen nudum)
Genus Opterigone Iredale, 1941 (nomen nudum)
Genus Orbitis Scudder, 1882 (nomen nudum)
Genus Orbitula Scudder, 1882 (nomen nudum)
Genus Orthocentrus Scudder, 1882 (nomen nudum)
Genus Osmanites Toula, 1896 † (nomen nudum)
Genus Ourotheutis Filhol, 1885 (nomen nudum)
Genus Pacherium Agassiz, 1845 (nomen nudum)
Genus Pachygomon Stache, 1880 † (nomen nudum)
Genus Pachyota Agassiz, 1845 (nomen nudum)
Genus Pachytos Defrance, 1824 † (nomen nudum)
Genus Pagoda Agassiz, 1845 (nomen nudum)
Genus Palaeodopsis Westoll, 1944 † (nomen nudum)
Genus Pannonica Loerenthey, 1895 (nomen nudum)
Genus Papulaoma Iredale, 1941 (nomen nudum)
Genus Parallelipipedum Agassiz, 1845 (nomen nudum)
Genus Paralus Rafinesque, 1815 (nomen nudum)
Genus Paratibetites Mojsisovics, 1896 † (nomen nudum)
Genus Parellipipedon Scudder, 1882 (nomen nudum)
Genus Paulodorra Iredale, 1941 (nomen nudum)
Genus Pelecania Scudder, 1882 (nomen nudum)
Genus Pelta Beck, 1837 (nomen nudum)
Genus Peratoptera Gray, 1840 (nomen nudum)
Genus Perfectiscala Cossmann, 1922 (nomen nudum)
Genus Perforella Rafinesque, 1915 (nomen nudum)
Genus Peribea Rafinesque, 1815 (nomen nudum)
Genus Periodon Rafinesque, 1815 (nomen nudum)
Genus Perrieria Munier-Chalmas, 1884 (nomen nudum)
Genus Pestomena Iredale, 1941 (nomen nudum)
Genus Peverilia Arkell, 1941 † (nomen nudum)
Genus Pharaonis Rafinesque, 1815 (nomen nudum)
Genus Pherusa Rafinesque, 1815 (nomen nudum)
Genus Phleboceras Paetel, 1875 (nomen nudum)
Genus Phonurga Scudder, 1882 (nomen nudum)
Genus Phoroneus Rafinesque, 1815 (nomen nudum)
Genus Phrenegibba Iredale, 1941 (nomen nudum)
Genus Phyleris Rafinesque, 1815 (nomen nudum)
Genus Phymotis Rafinesque, 1815 (nomen nudum)
Genus Pitys Beck, 1837 (nomen nudum)
Genus Placuna Solander, 1786 (nomen nudum)
Genus Plagiostyla Folin, 1871 (nomen nudum)
Genus Planuria Scudder, 1882 (nomen nudum)
Genus Platalias Rafinesque, 1815 (nomen nudum)
Genus Platinites Rafinesque, 1818 (nomen nudum)
Genus Platyostoma Scudder, 1882 (nomen nudum)
Genus Plectronia Gray, 1840 (nomen nudum)
Genus Pleurotrochus Grabau & Sherzer, 1908 † (nomen nudum)
Genus Plicaria Hartmann, 1840 (nomen nudum)
Genus Plicostoma Schlüter, 1838 (nomen nudum)
Genus Podagrus Oken, 1815 (nomen nudum)
Genus Poliphonus Rafinesque, 1815 (nomen nudum)
Genus Polydectus Rafinesque, 1815 (nomen nudum)
Genus Polygonia Scudder, 1882 (nomen nudum)
Genus Polytragus Scudder, 1882 (nomen nudum)
Genus Pomatia Röding, 1798 (nomen nudum)
Genus Pomularia Scudder, 1882 (nomen nudum)
Genus Potamia Gray, 1840 (nomen nudum)
Genus Praenuntius Scudder, 1882 (nomen nudum)
Genus Prodotus Paetel, 1875 (nomen nudum)
Genus Prognella Rafinesque, 1815 (nomen nudum)
Genus Pronuba Scudder, 1882 (nomen nudum)
Genus Prospiticeras Djanélidzé, 1922 † (nomen nudum)
Genus Proteusia Hartmann, 1840 (nomen nudum)
Genus Psilochylus Agassiz, 1845 (nomen nudum)
Genus Pumilio Scudder, 1882 (nomen nudum)
Genus Pygotheca Milne-Edwards, 1883 (nomen nudum)
Genus Pyraze Gray, 1840 (nomen nudum)
Genus Pyrena Scudder, 1882 (nomen nudum)
Genus Radula Gray, 1840 (nomen nudum)
Genus Rapa Scudder, 1882 (nomen nudum)
Genus Rhamphistoma Giebel, 1852 † (nomen nudum)
Genus Rhytiphorus Meek, 1871 † (nomen nudum)
Genus Rhytophorus Meek, 1871 † (nomen nudum)
Genus Ropalita Rafinesque, 1815 (nomen nudum)
Genus Rotala Scudder, 1882 (nomen nudum)
Genus Rubeta Scudder, 1882 (nomen nudum)
Genus Saga Scudder, 1882 (nomen nudum)
Genus Sagitella Scudder, 1882 (nomen nudum)
Genus Saronus Rafinesque, 1815 (nomen nudum)
Genus Scaevola Scudder, 1882 (nomen nudum)
Genus Scopus Scudder, 1882 (nomen nudum)
Genus Scrupeana Locard, 1890 (nomen nudum)
Genus Semicorbis Paetel, 1875 (nomen nudum)
Genus Sephinia Rafinesque, 1815 (nomen nudum)
Genus Serostena Iredale in Carpenter, 1941 (nomen nudum)
Genus Serrostoma Scudder, 1882 (nomen nudum)
Genus Simethis Paetel, 1875 (nomen nudum)
Genus Sinula Scudder, 1882 (nomen nudum)
Genus Sinum Hübner, 1810 (nomen nudum)
Genus Siphodon Rafinesque, 1815 (nomen nudum)
Genus Solimanites Toula, 1896 † (nomen nudum)
Genus Sphaerostoma Scudder, 1882 (nomen nudum)
Genus Spironites Rafinesque, 1815 (nomen nudum)
Genus Spirorbis Rafinesque, 1815 (nomen nudum)
Genus Spolium Scudder, 1882 (nomen nudum)
Genus Steniola Rafinesque, 1815 (nomen nudum)
Genus Stomatoptycha Scudder, 1882 (nomen nudum)
Genus Strangalostoma Scudder, 1882 (nomen nudum)
Genus Strigilaria Rafinesque, 1815 (nomen nudum)
Genus Subptychoceras Shimizu, 1935 (nomen nudum)
Genus Sympterus Rafinesque, 1815 (nomen nudum)
Genus Talopia Gray, 1840 (nomen nudum)
Genus Tania Gray, 1840 (nomen nudum)
Genus Tavaniothia Iredale, 1936 (nomen nudum)
Genus Telephorus Tilesius, 1805 (nomen nudum)
Genus Tepidatys Iredale, 1936 (nomen nudum)
Genus Teredolites Leymerie, 1841 † (nomen nudum)
Genus Testicina Rafinesque, 1815 (nomen nudum)
Genus Theobroma Scudder, 1882 (nomen nudum)
Genus Theoris Rafinesque, 1815 (nomen nudum)
Genus Thicolia Gray, 1840 (nomen nudum)
Genus Thoena Rafinesque, 1815 (nomen nudum)
Genus Tigrias Rafinesque, 1815 (nomen nudum)
Genus Timasenus Iredale, 1941 (nomen nudum)
Genus Toxostoma Rafinesque, 1818 (nomen nudum)
Genus Traneceras Hyatt, 1903 † (nomen nudum)
Genus Tremurus Rafinesque, 1815 (nomen nudum)
Genus Trichomecus Rafinesque, 1815 (nomen nudum)
Genus Trigonocaelia Gray, 1840 (nomen nudum)
Genus Tuba Fabricius, 1823 (nomen nudum)
Genus Umbella Scudder, 1882 (nomen nudum)
Genus Urcea Scudder, 1882 (nomen nudum)
Genus Urcinella Rafinesque, 1815 (nomen nudum)
Genus Vaginulopsis Simroth in Bronn, 1912 (nomen nudum)
Genus Valgum Scudder, 1882 (nomen nudum)
Genus Velum Agassiz, 1846 (nomen nudum)
Genus Vestiarius Rafinesque, 1815 (nomen nudum)
Genus Vibex Rafinesque, 1815 (nomen nudum)
Genus Vis Griffith & Pidgeon in Cuvier, 1834 (nomen nudum)
Genus Wolfartaria Gray, 1840 (nomen nudum)
Genus Wolfataria Gray, 1840 (nomen nudum)
Genus Wolskia Dybowski & Grochmalicki, 1917 (nomen nudum)
Genus Zilotea Rafinesque, 1815 (nomen nudum)

Genus Abranchus Boïé, 1824 (Misspelling)
Genus Abtychus Waagen, 1870 † (Misspelling)
Genus Acame Reichenbach, 1828 (Misspelling)
Genus Acanthopus Münster, 1839
Genus Acarda Rafinesque, 1815 (Misspelling)
Genus Acardo Bruguière, 1789 (Misspelling)
Genus Achanomphalus Dybowski & Groch-malicki, 1925 (Misspelling)
Genus Achatinellodes Ancey, 1885 (Unjustified (?) emendation)
Genus Achatinigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Acheloites Schinz in Cuvier, 1822 (Misspelling)
Genus Acheolis Paetel, 1875 (Misspelling)
Genus Acidochilus Cossmann, 1909 † (Misspelling)
Genus Acinophorus Tryon, 1884 (Misspelling)
Genus Actelois Strand, 1928 (Misspelling)
Genus Actomphalus † accepted as Arctomphalus Tolmachoff, 1926 †
Genus Acutianus Caziot, 1910 (Misspelling)
Genus Acylus Goldfuss, 1895 (Misspelling)
Genus Adalfina Caziot, 1910 (Misspelling)
Genus Adelostoma Smith, 1885 (Misspelling)
Genus Adriatica Westerlund, 1901 (Misspelling)
Genus Aethalion Herrmannsen, 1846 accepted as Ethalion Risso, 1826
Genus Aethoceras † accepted as Aethocera Teichert & Glenister, 1954 †
Genus Aganis Link, 1830 (Misspelling)
Genus Agatina Rafinesque, 1831 (Misspelling)
Genus Aglacostoma Schaufuss, 1869 (Misspelling)
Genus Aglaia Renier, 1804 (Published in a rejected work (ICZN))
Genus Aglaya Schaufuss, 1869 (Misspelling)
Genus Aglia Gray, 1847 (Misspelling)
Genus Alae Swainson, 1840 (Misspelling)
Genus Alasmodon Sowerby, 1824 (Unjustified (?) emendation)
Genus Alatites Gesner, 1758 † (unavailable name (suppressed work))
Genus Alcyonaria Renier, 1807 (Published in a rejected work (ICZN))
Genus Aldena Paetel, 1875 (Misspelling)
Genus Alima Carus & Gerstaecker, 1868-1875 (Misspelling)
Genus Aloea Sacco, 1886 (Misspelling)
Genus Alsacia Cossmann, 1922 † (Misspelling)
Genus Alyrus Simroth in Bronn, 1907 (Misspelling)
Genus Amethystina Schaufuss, 1869 (Misspelling)
Genus Amia Gistl, 1848 † (Unjustified (?) emendation)
Genus Ammimone Reichenbach, 1828 (Misspelling)
Genus Ammoceratita Fischer de Waldheim, 1834 † (Misspelling)
Genus Ammonceratites Morton, 1841 (Misspelling)
Genus Ammonita Gray, 1821 (Misspelling)
Genus Ammonoceratita de Blainville, 1824 (Misspelling)
Genus Ammonocerus King, 1844 (Misspelling)
Genus Ammouites Mathéron, 1878 † (Misspelling)
Genus Amphibinea Pallary, 1904 (Misspelling)
Genus Amphibulimigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Amphipomorphites Paetel, 1875 (Misspelling)
Genus Amphitridea Paetel, 1875 (Misspelling)
Genus Amphitridia Paetel, 1875 (Misspelling)
Genus Amphitritidia Anon., 1847 (Misspelling)
Genus Ampullarigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Ampullaroides Gray, 1847 (Misspelling)
Genus Ampulloides d'Orbigny in Sagra, 1842 (Misspelling)
Genus Amymone Agassiz, 1846 (Unjustified (?) emendation)
Genus Amymonus Herrmannsen, 1846 (Misspelling)
Genus Anacosmoceras Stoll, 1934 † (Unjustified (?) emendation)
Genus Anadarca Finlay, 1926 † (Misspelling)
Genus Anadura Paetel, 1890 † (Misspelling)
Genus Anatinigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Anaulox Hörnes & Auinger, 1880 † (Misspelling)
Genus Ancilligenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Anclustoma Hall, 1867 (Misspelling)
Genus Ancolorhynchus Cossmann, 1902 † (Misspelling)
Genus Aneityopsisis Grimpe & Hoffmann, 1924 (Misspelling)
Genus Angaricus Suter, 1913 (Misspelling)
Genus Angiostoma Agassiz, 1846 (Misspelling)
Genus Angulomitrella Suter, 1913 (Misspelling)
Genus Anneastrum Bourguignat, 1883 (Misspelling)
Genus Anodontigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Anolax Brongniart, 1823 † (Unjustified (?) emendation)
Genus Anomia Deshayes, 1830 (Misspelling)
Genus Anomigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Anoplomya Krauss, 1850 (Misspelling)
Genus Anphibina Picaglia, 1893 (Misspelling)
Genus Aphrodita Leach in Sowerby, 1839 (Misspelling)
Genus Aphroditha Paetel, 1875 (Misspelling)
Genus Aphrodithe Paetel, 1875 (Misspelling)
Genus Apoëcus Möllendorff in Martini & Chemnitz, 1902 accepted as Apoecus Möllendorff in Martini & Chemnitz, 1902
Genus Apogogus Gistl, 1848 (Unjustified (?) emendation)
Genus Appias Paetel, 1875 (Misspelling)
Genus Aptichus Crosse, 1867 † (Misspelling)
Genus Aptycoteuthis Reynès, 1879 (Misspelling)
Genus Aradana Suter, 1913 (Misspelling)
Genus Archigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Architaea Monterosato, 1875 (Unjustified (?) emendation)
Genus Archytaea Monterosato, 1875 (Misspelling)
Genus Archytea Kobelt, 1887 (Misspelling)
Genus Arcinellina Bronn, 1849 † (Misspelling)
Genus Arcomyopsis Zittel, 1895 † (Misspelling)
Genus Argyrectenites Paetel, 1875 (Misspelling)
Genus Arhaeozonites Suklje, 1930 (Misspelling)
Genus Arieticeras Quenstedt, 1882 (Not validly published)
Genus Artaeon Crosse, 1884 (Misspelling)
Genus Arthronotus Rafinesque, 1815 (Unjustified (?) emendation)
Genus Arytaena Oken, 1817 (Misspelling)
Genus Arytaene Oken, 1815 (Misspelling)
Genus Arythaena Deshayes, 1830 (Misspelling)
Genus Aspergilligenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Aspergillum Agassiz, 1846 (Unjustified (?) emendation)
Genus Astortopis Diener, 1909 † (Misspelling)
Genus Astraea Hartman, 1881
Genus Ataxas Pilsbry in Tryon & Pilsbry, 1902 (Misspelling)
Genus Aulacotrochrus Cossmann, 1918 † (Misspelling)
Genus Auriculigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Avenacea Caziot, 1910 (Misspelling)
Genus Avenionensis Caziot, 1910 (Misspelling)
Genus Averna Gistl, 1848 (Unjustified (?) emendation)
Genus Axinoderma Herrmannsen, 1845 (Misspelling)
Genus Azaria Tryon, 1872 (Misspelling)
Genus Azeka Oppenheim, 1890 (Misspelling)
Genus Bactricoptis Pilsbry in Tryon & Pilsbry, 1903 (Misspelling)
Genus Baicaliella Dybowski & Grochmalicki, 1923 (Misspelling)
Genus Baicalinopsis Lindholm, 1927 (Misspelling)
Genus Balea Agassiz, 1846 (Unjustified (?) emendation)
Genus Balinsus Hasselt, 1823 (Misspelling)
Genus Bambaganites Hyatt in Eastman-Zittel, 1900 † (Misspelling)
Genus Barbata Sowerby, 1839 (Misspelling)
Genus Barboria Lindholm, 1924 (Misspelling)
Genus Belemno-Sepia Buckland, 1835 † accepted as Belemnosepia Buckland, 1835 †
Genus Belemnus Fischer, 1817 (Misspelling)
Genus Berenguiereana Caziot, 1910 (Misspelling)
Genus Berenguieriane Caziot, 1910 (Misspelling)
Genus Besairiei Heinz, 1932 † (Misspelling)
Genus Bidleya Möllendorff, 1901 (Misspelling)
Genus Binotata Roemer, 1891 † (Misspelling)
Genus Binovoluta Schaufuss, 1869 (Misspelling)
Genus Birostrites Lamarck, 1819 (Suppressed name (ICZN))
Genus Birostrum Bronn, 1837 (Misspelling)
Genus Bisiphites Oken, 1815 (Misspelling)
Genus Boloea Dyson, 1850 (Misspelling)
Genus Bombix Paetel, 1875 (Misspelling)
Genus Bonannius Dautzenberg, 1900 (Unjustified (?) emendation)
Genus Boscovicia Crosse, 1885 † (Misspelling)
Genus Boskavicia Dautzenberg, 1903 † (Misspelling)
Genus Boskoviciae Lorenthey, 1895 † (Misspelling)
Genus Bostrychopteron Paetel, 1875 (Misspelling)
Genus Bostrychopterum Agassiz, 1846 (Unjustified (?) emendation)
Genus Bourya Raspail, 1909 (Misspelling)
Genus Brachichlanis Carpenter, 1861 (Misspelling)
Genus Brachychlamis Bronn, 1863 (Misspelling)
Genus Brachychlamys Gray, 1840 (Misspelling)
Genus Brachychlanys Pruvot-Fol, 1933 (Misspelling)
Genus Brachylanis O'Donoghue, 1929 (Misspelling)
Genus Brachypus Guilding, 1828
Genus Brazzea Germain, 1909 (Misspelling)
Genus Brephyllium Agassiz, 1846 (Unjustified (?) emendation)
Genus Brephyllum Paetel, 1875 (Misspelling)
Genus Briartia Fischer, 1885 (Unjustified (?) emendation)
Genus Brusinaella Andrussov, 1912 † (Misspelling)
Genus Bruzzaea Paetel, 1890 (Misspelling)
Genus Buccinigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Buccinites Gesner, 1758 † (unavailable name (suppressed work))
Genus Buccinomitra Cossmann, 1901 † (Unjustified (?) emendation)
Genus Bulimigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Bulligenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Bullula Agassiz, 1846 (Unjustified (?) emendation)
Genus Burgersteinia Bourguignat, 1882 † (Misspelling)
Genus Bursiris Gray, 1842 (Misspelling)
Genus Bursirus Paetel, 1875 (Misspelling)
Genus Businis Paetel, 1875 (Misspelling)
Genus Caelatiana Caziot, 1910 (Misspelling)
Genus Caelopoma Paetel, 1875 (Misspelling)
Genus Caenatoria Pilsbry in Tryon & Pilsbry, 1895 (Misspelling)
Genus Calana Gray, 1847 (Misspelling)
Genus Calcara Tryon, 1884 (Misspelling)
Genus Caldivitrina Connolly, 1930 (Misspelling)
Genus Calipeopsis d'Orbigny, 1842 † (Misspelling)
Genus Calirrhoa Paetel, 1875 accepted as Callirhoe Montfort, 1808
Genus Calirrhoe Reichenbach, 1828 accepted as Callirhoe Montfort, 1808
Genus Calliostoma-Photinula Strebel, 1908 accepted as Calliostomaphotinula Strebel, 1908
Genus Callipeopsis Paetel, 1875 † (Misspelling)
Genus Callirhoë Montfort, 1808 accepted as Callirhoe Montfort, 1808
Genus Calliroe Herrmannsen, 1846 accepted as Callirhoe Montfort, 1808
Genus Callirrhoa Herrmannsen, 1846 accepted as Callirhoe Montfort, 1808
Genus Callistrichoderma Meek, 1865 (Misspelling)
Genus Callitrichoderma Oken, 1818 (Misspelling)
Genus Calodonia Pallary, 1916 † (Misspelling)
Genus Calypaeopsis Carpenter, 1864 † (Misspelling)
Genus Calyptraeactaeon Kobelt, 1889 (Misspelling)
Genus Calyptraeigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Camelaea Herrmannsen, 1852 (Misspelling)
Genus Campilostylus Collot, 1891 † (Misspelling)
Genus Camptocephalites Cossmann, 1924 † (Unjustified (?) emendation)
Genus Canabina Paetel, 1875 (Misspelling)
Genus Cancellarigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Caniogerus Bronn, 1866 (Misspelling)
Genus Canoceras Fischer de Waldheim, 1844 (Misspelling)
Genus Canthiopsis Paetel, 1875 (Misspelling)
Genus Canthisdomus Cossmann, 1889 † (Misspelling)
Genus Capisterium Herrmannsen, 1852 (Misspelling)
Genus Capsigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Carassa Gistl, 1847 (Unjustified (?) emendation)
Genus Cardigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Carditigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Carinaroides Deshayes, ? 1864 (Misspelling)
Genus Carinoidea Paetel, 1875 (Misspelling)
Genus Carybditeuthis Vivanti, 1914 (Misspelling)
Genus Casida Agassiz, 1846 (Misspelling)
Genus Cassidoma Cossmann, 1899 † (Misspelling)
Genus Cassigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Castroianana Caziot, 1910 (Misspelling)
Genus Cemeneliana Caziot, 1910 (Misspelling)
Genus Cemori Beddome, 1883 (Misspelling)
Genus Ceratoides Catlow, 1845 (Misspelling)
Genus Ceratophora Gistl, 1848 (Misspelling)
Genus Ceratopilus Cossmann, 1906 † (Misspelling)
Genus Cerithes Paetel, 1875 (Misspelling)
Genus Cerithiigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Ceropleura Cossmann, 1895 † (Misspelling)
Genus Cetocine Reichenbach, 1828 (Misspelling)
Genus Chama Oken, 1815 (Published in a rejected work (ICZN))
Genus Chama Mörch, 1853
Genus Chama da Costa, 1778
Genus Chamigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Chamites Gesner, 1758 † (unavailable name (suppressed work))
Genus Charactrobia Retowski, 1882 (Misspelling)
Genus Charhydrobia Cossmann, 1921 † (Misspelling)
Genus Charmassiceras Dacqué, 1934 † (Misspelling)
Genus Charubditeuthis Vivanti, 1914 (Misspelling)
Genus Charyibiteuthis Vivanti, 1914 (Misspelling)
Genus Chelekenia Andrusov, 1903 (Misspelling)
Genus Chelidoneura Simpson, 1900 (Misspelling)
Genus Chermites Paetel, 1875 (Misspelling)
Genus Chilogimnus Jousseaume, 1894 (Misspelling)
Genus Chistolia Sayn, 1928 † (Misspelling)
Genus Chitonigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Chittya Pfeiffer, 1865 (Unjustified (?) emendation)
Genus Chlamydoconcha Pilsbry & Tryon, 1893 (Misspelling)
Genus Chrysammites Paetel, 1875 (Misspelling)
Genus Chrysaore Reichenbach, 1828 (Misspelling)
Genus Chrysoar Sowerby, 1839 (Misspelling)
Genus Cichoracea Oken, 1817 (Misspelling)
Genus Cichoreum Paetel, 1875 (Misspelling)
Genus Cichorium Voigt in Cuvier, 1834 (Misspelling)
Genus Cicinna Picaglia, 1892 † (Misspelling)
Genus Ciclostrema Paetel, 1875 (Misspelling)
Genus Cimbium Montfort, 1810 (Misspelling)
Genus Cinciana Oppenheim, 1891 † (Misspelling)
Genus Cincinnaa Schlesch, 1925 † (Misspelling)
Genus Cinctodonta Paetel, 1875 (Misspelling)
Genus Cincuma Schlesch, 1925 † (Misspelling)
Genus Cinetodonta Herrmannsen, 1847 (Unjustified (?) emendation)
Genus Cirrhopteron Paetel, 1875 (Misspelling)
Genus Citharella Thiele, 1929 (Misspelling)
Genus Cladoceramus Heinz, 1932 †
Genus Clancophila Cossmann, 1925 † (Misspelling)
Genus Clanculellus Monterosato, 1923 (Misspelling)
Genus Clausilistra Clessin, 1886 (Misspelling)
Genus Clavatuligenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Clavifurus Cossmann, 1893 † (Misspelling)
Genus Cleanchus Paetel, 1875 (Misspelling)
Genus Cleantus Leach, 1852 (Misspelling)
Genus Clepticolimax Westerlund, 1897 (Misspelling)
Genus Clipeus Scacchi, 1836 (Misspelling)
Genus Cloisonnaria Adams, 1858 (Misspelling)
Genus Clossonaria Paetel, 1875 (Misspelling)
Genus Clypeicella Schaufuss, 1869 (Misspelling)
Genus Clypidiella Cockerell, 1893 (Misspelling)
Genus Cochleogena Desmarest in Chenu, 1859 (Misspelling)
Genus Cochlidium Scudder, 1882 (Misspelling)
Genus Cochlites Gesner, 1758 † (unavailable name (suppressed work))
Genus Cochlodon Sowerby, 1825 (Misspelling)
Genus Cochloolepas Fischer, 1862 (Misspelling)
Genus Cochlotoma Agassiz, 1846 (Unjustified (?) emendation)
Genus Coclytoma Desmarest in Chenu, 1859 (Misspelling)
Genus Coelacanthis Cossmann, 1921 † (Misspelling)
Genus Coelopleura Cossmann, 1923 † (Unjustified (?) emendation)
Genus Coleoceras Agassiz, 1846 † (Unjustified (?) emendation)
Genus Colobus Albers, 1850
Genus Columbellarius Froriep, 1806 (Misspelling)
Genus Columbelligenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Columplicata Paetel, 1875 (Misspelling)
Genus Colyma Rafinesque, 1815 (Misspelling)
Genus Colymbites Paetel, 1875 (Misspelling)
Genus Colymbus Paetel, 1875
Genus Conalex Paetel, 1875 (Misspelling)
Genus Conalix Jay, 1836 (Misspelling)
Genus Conchilium Oken, 1817 (Misspelling)
Genus Concho-Lepas Solander, 1786 accepted as Concholepas Solander, 1786
Genus Concinna Adams, 1854 † (Misspelling)
Genus Concola Dybowski, 1902 (Misspelling)
Genus Concolepadigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Condiloceras Uhlig, 1903 † (Unjustified (?) emendation)
Genus Condrulus Picaglia, 1894 (Misspelling)
Genus Conicus Paetel, 1875 (Misspelling)
Genus Conigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Conilites Agassiz, 1846 (Unjustified (?) emendation)
Genus Coniolus Paetel, 1890 (Misspelling)
Genus Conoehelix Swainson, 1840 (Misspelling)
Genus Conohelix Agassiz, 1846 (Unjustified (?) emendation)
Genus Conolix Paetel, 1875 (Misspelling)
Genus Conolus Pallary, 1901 † (Misspelling)
Genus Conophera Tryon, 1884 (Misspelling)
Genus Conophora Suter, 1909 (Misspelling)
Genus Conospira Cossmann, 1896 † (Unjustified (?) emendation)
Genus Conovolus Gistl, 1848 (Misspelling)
Genus Conularites Bowdich, 1822 (Misspelling)
Genus Conulus Fitzinger, 1833 †
Genus Cophinoceras Hyatt in Eastman-Zittel, 1900 † (Misspelling)
Genus Coracias Herrmannsen, 1847
Genus Corbuligenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Corneola Westerlund, 1873 (Misspelling)
Genus Cornetus Oppenheim, 1890 (Misspelling)
Genus Cornulus Cockerell, 1885 † (Misspelling)
Genus Costella Meek, 1876 † (Misspelling)
Genus Costulelithus Paetel, 1875 (Misspelling)
Genus Couphiana Bourguignat, 1884 (Misspelling)
Genus Crassatelligenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Crena Wenz, 1923 † (Misspelling)
Genus Crenatuligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Crepiduligenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Crisia Menke, 1844 (Misspelling)
Genus Cristallina Caziot, 1910 (Misspelling)
Genus Crystallina Caziot, 1910 (Misspelling)
Genus Cuculella Sandberger, 1889 † (Misspelling)
Genus Cucullaeigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Cucullela Tromelin & Lebesconte, 1875 † (Misspelling)
Genus Cumbieria Martens, 1891 (Misspelling)
Genus Curricula Gray, 1847 (Misspelling)
Genus Cuvierana Bronn, 1848 † (Unjustified (?) emendation)
Genus Cycladigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Cyclensis Paetel, 1890 (Misspelling)
Genus Cyclodama Paetel, 1875 (Misspelling)
Genus Cyclostomigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Cylindrites Gesner, 1758 † (unavailable name (suppressed work))
Genus Cylindritis Skeat & Madsen, 1898 † (Misspelling)
Genus Cyphidaeana Caziot, 1910 (Misspelling)
Genus Cyphideana Caziot, 1910 (Misspelling)
Genus Cyphoxus Paetel, 1875 (Misspelling)
Genus Cyphoxys Agassiz, 1846 (Unjustified (?) emendation)
Genus Cypraearius Froriep in Duméril, 1806 (Misspelling)
Genus Cypraecites Paetel, 1875 (Misspelling)
Genus Cypraeigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Cypricea Gray, 1853 (Misspelling)
Genus Cyreno-cyclas Agassiz, 1846 accepted as Cyrenocyclas Agassiz, 1846
Genus Cyrthoceras Nalivkin, 1930 † (Misspelling)
Genus Cyrtodera de Blainville, 1825 (Misspelling)
Genus Cyrtodoria Férussac, 1821 (Misspelling)
Genus Cystia Renier, 1804 (Published in a rejected work (ICZN))
Genus Cystigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Cytherigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Dacromya Loriol, 1899 † (Misspelling)
Genus Dactyliomorpha Wenz, 1923 † (Misspelling)
Genus Danalis Mörch, 1853 (Misspelling)
Genus Dascinus Gray, 1850 (Misspelling)
Genus Defrancia Möller, 1842
Genus Delphinuligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Dentellocaracollus Oppenheim, 1890 (Misspelling)
Genus Dentostoma Paetel, 1875 (Misspelling)
Genus Deridobranchia Paetel, 1875 (Misspelling)
Genus Deriobranchus Gray, 1840 (Misspelling)
Genus Desmarestea Paetel, 1875 (Misspelling)
Genus Desmarestia Herrmannsen, 1847 (Misspelling)
Genus Dexiogira de Betta, 1870 (Misspelling)
Genus Diachora Desmarest in Chenu, 1859 (Misspelling)
Genus Diaphana Caziot, 1910 (Misspelling)
Genus Diatropha Gray in Turton, 1840 (Misspelling)
Genus Diceratigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Diceratis Paetel, 1875 (Misspelling)
Genus Dicrasna Paetel, 1889 (Misspelling)
Genus Dicthyetis Paetel, 1875 (Misspelling)
Genus Diggreidum Paetel, 1887 (Misspelling)
Genus Digyreidum Westerlund, 1902 (Misspelling)
Genus Digyridum Cossmann, 1921 † (Misspelling)
Genus Dionositis Férussac, 1835 (Misspelling)
Genus Dipilidia Matheron, 1843 † (Suppressed name (ICZN))
Genus Dipillidia Paetel, 1875 † (Misspelling)
Genus Diplomoptychia Dacqué, 1933 † (Misspelling)
Genus Diplopelecya Locard, 1886 (Unjustified (?) emendation)
Genus Dipsada Griffith in Cuvier, 1834 (Misspelling)
Genus Dipsax Voigt in Cuvier, 1834 (Unjustified (?) emendation)
Genus Dipsus Gray, 1835 (Misspelling)
Genus Diretrostoma Dollfus, 1912 (Misspelling)
Genus Discoehelix Pavlovic, 1926 † (Misspelling)
Genus Discoides Renier, 1804 (Published in a rejected work (ICZN))
Genus Discosoma Paetel, 1875 (Misspelling)
Genus Discovermetus Cossmann, 1905 † (Misspelling)
Genus Ditomus Agassiz, 1846 (Unjustified (?) emendation)
Genus Dolialiana Caziot, 1910 (Misspelling)
Genus Doliigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Doliocephalites Cossmann, 1924 † (Unjustified (?) emendation)
Genus Donacigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus d'Orbignya Tate in Tate-Woodward, 1868 accepted as Dorbignya Tate in Tate-Woodward, 1868
Genus Doridobranchus Paetel, 1875 (Misspelling)
Genus Dorimorpha Herrmannsen, 1852 (Misspelling)
Genus Doringina Ihering, 1929 accepted as Doeringina Ihering, 1929
Genus Döringina Ihering, 1929 accepted as Doeringina Ihering, 1929
Genus Dracryomia Gressly, 1838 † (Misspelling)
Genus Drapanocaulis Germain, 1920 (Misspelling)
Genus Drilliocerithium Cossmann, 1910 † (Misspelling)
Genus Dybowskiella Kobelt, 1913 (Misspelling)
Genus Dypsas Kobelt, 1880 (Misspelling)
Genus Eburnigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Echidius Paetel, 1875 (Misspelling)
Genus Echinoderma Deshayes, 1830 (Misspelling)
Genus Echinotis Marwick, 1935 (Misspelling)
Genus Echioderma Gray, 1825 (Misspelling)
Genus Eglaea Deshayes, 1830 (Misspelling)
Genus Eglea Paetel, 1875 (Misspelling)
Genus Elenodon Porro, 1840 (Misspelling)
Genus Elismia Leach, 1847 (Misspelling)
Genus Ellipsolites Sowerby, 1813 (Misspelling)
Genus Ellipsolithes Montfort, 1808 (Suppressed name (ICZN))
Genus Ellipsolithus Herrmannsen, 1847 (Misspelling)
Genus Ellistoma Menke, 1830 (Misspelling)
Genus Emarginuligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Endocostea-Haenleinia Toula, 1912 † accepted as Endocosteahaenleinia Toula, 1912 †
Genus Engina Preston, 1909 (Misspelling)
Genus Englesia Paetel, 1875 (Misspelling)
Genus Entragus Paetel, 1875 (Misspelling)
Genus Enydra Dall, 1905 (Misspelling)
Genus Eolimax Caziot, 1910 (Misspelling)
Genus Epalscites Douvillé, 1910 † (Misspelling)
Genus Epiploa Megerle MS. (Unavailable (MS name))
Genus Episphylla Paetel, 1890 (Misspelling)
Genus Epistilia Pilsbry in Tryon & Pilsbry, 1893 (Misspelling)
Genus Epistyla Swainson, 1840 (Misspelling)
Genus Ermoea Cossmann, 1925 † (Misspelling)
Genus Ernestia Kennard & Woodward, 1926 (Misspelling)
Genus Erpetrometra Pfeiffer, 1857 (Misspelling)
Genus Erycinigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Ethalion Risso, 1826 (Suppressed name (ICZN))
Genus Etheriigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Eubaikalia Starostin, 1926 (Misspelling)
Genus Eucampyloea Caziot, 1903 (Misspelling)
Genus Euchylus Dollfus, 1912 (Misspelling)
Genus Euclasta Lindholm, 1924 (Misspelling)
Genus Eudoxas Paetel, 1889 (Misspelling)
Genus Euglesa Gray in Turton, 1840 (Misspelling)
Genus Euhalina Clessin, 1877 (Misspelling)
Genus Euhyalinia Taylor, 1907 (Unjustified (?) emendation)
Genus Eulimax Cockerell, 1893 (Misspelling)
Genus Eumele Gray, 1847 (Misspelling)
Genus Euphira Paetel, 1875 (Misspelling)
Genus Eupomatia Caziot, 1910 (Misspelling)
Genus Euprocerites Wetzel, 1950 † accepted as Procerites Siemiradzki, 1898 †
Genus Eupyphantoceras Shimizu, 1935 (Misspelling)
Genus Euritus Jousseaume, 1900 (Misspelling)
Genus Euromphala Lowe, 1852 (Misspelling)
Genus Eurotella Ikeda, 1930 (Misspelling)
Genus Eurybia Menke, 1830 (Misspelling)
Genus Euryomphala Agassiz, 1846 (Unjustified (?) emendation)
Genus Eurystophe Cossmann, 1912 † (Misspelling)
Genus Euyalina Pini, 1885 (Misspelling)
Genus Exogyceras Simroth in Bronn, 1907 † (Misspelling)
Genus Eyromphala Gray, 1847 (Misspelling)
Genus Fågotiana Bourguignat, 1884 accepted as Fagotiana Bourguignat, 1884
Genus Fannetia Fischer, 1885 (Misspelling)
Genus Fannia Dall, 1882 (Misspelling)
Genus Fasciolarigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Faurotus Jousseaume, 1892 (Misspelling)
Genus Fectaria Philippi, 1846 (Misspelling)
Genus Fidela Risso, 1826 (Suppressed name (ICZN))
Genus Finlaria Paetel, 1890 (Misspelling)
Genus Fissurelligenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Fistulanigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Flagellocaulis Simroth in Voeltzkow, 1913 (Misspelling)
Genus Flumina Picaglia, 1892 (Misspelling)
Genus Flumininea Clessin, 1877 (Misspelling)
Genus Fluminium Müller, 1921 (Misspelling)
Genus Follicullus Cossmann, 1889 † (Misspelling)
Genus Follmamella Williams, 1913 (Misspelling)
Genus Forsar Gray, 1847 (Misspelling)
Genus Forscalia Paetel, 1888 accepted as Forskalia H. Adams & A. Adams, 1854 accepted as Gibbula Risso, 1826
Genus Forskahlia Smith, 1879 accepted as Forskalia H. Adams & A. Adams, 1854 accepted as Gibbula Risso, 1826
Genus Forskåhlia Smith, 1879 accepted as Forskalia H. Adams & A. Adams, 1854 accepted as Gibbula Risso, 1826
Genus Forskälia Adams, 1854 accepted as Forskalia H. Adams & A. Adams, 1854 accepted as Gibbula Risso, 1826
Genus Fosarulus Milovanovic, 1935 † (Misspelling)
Genus Fossaria Clessin, 1910 (Misspelling)
Genus Fossarullus Brusina, 1882 † (Misspelling)
Genus Fossiculorbis Haas, 1934 (Misspelling)
Genus Fucicola Menke, 1844 (Unjustified (?) emendation)
Genus Fumecostylus Paetel, 1875 (Misspelling)
Genus Fusarium Link, 1830 (Misspelling)
Genus Fusigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Gadus Rang, 1829
Genus Galactochillus Suklje, 1930 (Misspelling)
Genus Galateigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Galaxis Paetel, 1875 (Misspelling)
Genus Ganomidus Böttger, 1905 (Misspelling)
Genus Gastridia Gray, 1847 (Misspelling)
Genus Gastroptera Agassiz, 1846 (Unjustified (?) emendation)
Genus Gastrosiphone Gray, 1842 (Misspelling)
Genus Gauga Cossmann, 1909 † (Misspelling)
Genus Gemmelaria Paetel, 1875 (Misspelling)
Genus Genioclymenia Gillet, 1924 † (Misspelling)
Genus Geoscalaria Martens in Albers, 1860 (Unjustified (?) emendation)
Genus Geothentis Blanckenhorn, 1890 † (Misspelling)
Genus Germanties Gillet, 1924 † (Misspelling)
Genus Gerstfeldia Westerlund, 1902 (Misspelling)
Genus Gervissia Desmarest in Chenu, 1858 (Misspelling)
Genus Gibaulina Mabille, 1897 (Misspelling)
Genus Gibbolino Martens in Moebius, 1880 (Misspelling)
Genus Gioena Bruguière, 1791 (Misspelling)
Genus Girorbis Bourguignat, 1876 (Misspelling)
Genus Givenia Draparnaud in Millin, 1799 (Misspelling)
Genus Gladophora Bronn, 1863 (Misspelling)
Genus Glaucium Agassiz, 1846 (Unjustified (?) emendation)
Genus Globites de Haan, 1825 (Suppressed name (ICZN))
Genus Globosites Gesner, 1758 † (unavailable name (suppressed work))
Genus Glochidium Rathke, 1797 (Suppressed name (ICZN))
Genus Glossiderma Paetel, 1875 (Misspelling)
Genus Glossoceras Douvillé, 1907 (Unjustified (?) emendation)
Genus Glycimerigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Gonatochilus Cossmann, 1909 † (Misspelling)
Genus Gonatorhyphe Thiele, 1929 (Misspelling)
Genus Goniatochilus Cossmann, 1909 † (Misspelling)
Genus Goniomerys Dacqué, 1933 † (Misspelling)
Genus Gonodon Schafhäutl, 1863 † accepted as Schafthautlia Cossmann, 1897 †
Genus Gonodus Mušketov, 1913 † accepted as Schafthautlia Cossmann, 1897 †
Genus Gonoidon Herrick, 1888 (Misspelling)
Genus Goria Gamble, 1891 (Misspelling)
Genus Gostoma Ancey, 1883 (Misspelling)
Genus Goumierium Monterosato, 1910 † (Unjustified (?) emendation)
Genus Graniana Caziot, 1910 (Misspelling)
Genus Gryphaeigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Guettera Adams, 1856 (Misspelling)
Genus Gwyn-Jeffreysia Crosse, 1885 accepted as Gwynjeffreysia Crosse, 1885
Genus Gyrobis Paetel, 1875 (Misspelling)
Genus Gyrorbis Moquin-Tandon, 1856 accepted as Wuestia Honigmann, 1909
Genus Hadrochilus Cossmann, 1909 † (Unjustified (?) emendation)
Genus Haeratula Herrmannsen, 1847 (Misspelling)
Genus Haliotidigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Hapalomia Röder, 1882 (Misspelling)
Genus Haphohelix Ihering, 1929 (Misspelling)
Genus Haplodon Agassiz, 1846 (Unjustified (?) emendation)
Genus Harpalites Paetel, 1875 (Misspelling)
Genus Harpalus Godwin-Austen, 1872 (Misspelling)
Genus Harparia Rafinesque, 1815 (Unjustified (?) emendation)
Genus Harpigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Haselbudgites Cossmann, 1921 † (Misspelling)
Genus Haselburgites Buckman, 1920 † (Unjustified (?) emendation)
Genus Haselbutgites Cossmann, 1921 † (Misspelling)
Genus Hautkenia Eastman, 1900 † (Misspelling)
Genus Hautlecoeuria Paetel, 1888 (Misspelling)
Genus Heinemannia Sacco, 1887 (Misspelling)
Genus Helcopoma Caziot, 1910 (Misspelling)
Genus Helenchus Gray, 1847 accepted as Heleuchus Herrmannsen, 1847
Genus Helëuchus Herrmannsen, 1847 accepted as Heleuchus Herrmannsen, 1847
Genus Heliceras Fischer, 1882 (Unjustified (?) emendation)
Genus Helicigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Helicinigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Helicocerus Herrmannsen, 1852 † (Misspelling)
Genus Helicoides Gray, 1855 (Misspelling)
Genus Helicomarpha Möllendorff, 1898 (Misspelling)
Genus Helictopsis Paetel, 1888 (Misspelling)
Genus Heliocerus King, 1844 † (Misspelling)
Genus Heliomanes Kobelt, 1871 (Unjustified (?) emendation)
Genus Hemiceras Eichwald, 1856 (Unjustified (?) emendation)
Genus Hemilonia Paetel, 1875 (Misspelling)
Genus Hemitaxa Wenz, 1923 † (Misspelling)
Genus Hemithalasmus Paetel, 1889 (Misspelling)
Genus Hepata Paetel, 1875 (Misspelling)
Genus Heretula Herrmannsen, 1847 (Misspelling)
Genus Hermiceratites Paetel, 1875 (Misspelling)
Genus Heteroptychia Kennard & Woodward, 1923 (Misspelling)
Genus Hierifalchia Fucini, 1906 † (Misspelling)
Genus Hilobites Stolley, 1929 † (Misspelling)
Genus Hippopigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Hipterus Herrmannsen, 1847 (Misspelling)
Genus Hirundigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Hispidiana Fagot, 1883 (Misspelling)
Genus Hispidula Tapparoni-Canefri, 1879 (Misspelling)
Genus Holeopoma Westerlund, 1903 (Misspelling)
Genus Holicella Petrbok, 1930 † (Misspelling)
Genus Hololubus Cossmann, 1905 † (Misspelling)
Genus Homalaxon Bronn, 1848 † (Misspelling)
Genus Horiadacna Dollfus, 1905 † (Unjustified (?) emendation)
Genus Hyalaeus Montfort, 1810 (Misspelling)
Genus Hybocistis Crosse, 1866 (Misspelling)
Genus Hydatinus Böttger, 1911 † (Misspelling)
Genus Hydraena Dupuy, 1886 (Misspelling)
Genus Hydrocaena Shuttleworth, 1852 (Misspelling)
Genus Hydrocera Troschel, 1845 (Misspelling)
Genus Hydrotaena Ryckholt, 1860 (Misspelling)
Genus Hylostoma Paetel, 1875 (Misspelling)
Genus Hymenaelis O'Donoghue, 1929 (Misspelling)
Genus Hyphantra Cossmann, 1889 † (Misspelling)
Genus Hypnaxis Gray, 1847 (Misspelling)
Genus Hypoma Pfeiffer, 1879 (Misspelling)
Genus Hypopterus Paetel, 1875 (Misspelling)
Genus Hypostrema Pfeiffer, 1879 (Misspelling)
Genus Hypselostylus Bartsch, 1932 (Misspelling)
Genus Ibicornu Wenz, 1928 † (Misspelling)
Genus Idalla Örsted, 1844 (Suppressed name (ICZN))
Genus Idoleum Paetel, 1889 (Misspelling)
Genus Ilia Hartman, 1881
Genus Ilyda Clessin, 1879 (Misspelling)
Genus Imisigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Inoculia Fischer, 1887 † (Misspelling)
Genus Intermedia Caziot, 1910 (Misspelling)
Genus Iothmia Geyer, 1912 (Misspelling)
Genus Iphinöe Adams, 1854 (Misspelling)
Genus Ipsidula Mörch, 1857 (Misspelling)
Genus Isaba Chenu, 1859 † (Misspelling)
Genus Isocardigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Isodon Douvillé, 1912 † (Unjustified (?) emendation)
Genus Isopleura Meek, 1864 (Misspelling)
Genus Istmia Pini, 1876 (Misspelling)
Genus Jacosta Gray, 1821 (Suppressed name (ICZN))
Genus Janefla Paetel, 1875 (Misspelling)
Genus Joanisiella Cossmann, 1900 † (Misspelling)
Genus Jodamia Defrance, 1822 (Suppressed name (ICZN))
Genus Jusianana Caziot, 1910 (Misspelling)
Genus Klikaia Böttger, 1909 (Misspelling)
Genus Koinodactylites Buckman, 1927 † accepted as Dactylioceras Hyatt, 1867 †
Genus Koninckoceras Hyatt in Eastman-Zittel, 1900 † (Misspelling)
Genus Krinickia Folin & Bérillon, 1877 (Misspelling)
Genus Krynichia Hazay, 1885 (Misspelling)
Genus Labroëna Lindholm, 1927 accepted as Labroena Lindholm, 1927
Genus Laconsilla Paetel, 1875 (Misspelling)
Genus Laeonica Paetel, 1883 (Misspelling)
Genus Laeorthalicus Strebel, 1909 (Misspelling)
Genus Lagurius Paetel, 1875 (Misspelling)
Genus Lallemannia Tryon, 1884 (Misspelling)
Genus Lamarkia Paetel, 1875 (Misspelling)
Genus Laniger Herrmannsen, 1847 (Unjustified (?) emendation)
Genus Laniocerus Desmarest in Chenu, 1859 (Misspelling)
Genus Laplyzia Radermacher, 1779 (Misspelling)
Genus Lateribranchaeia O'Donoghue, 1926 (Misspelling)
Genus Lathyra Agassiz, 1845 (Unjustified (?) emendation)
Genus Lathyra Oken, 1817 (Misspelling)
Genus Lecithoconcha Haas & Wenz, 1925 (Misspelling)
Genus Legea Westerlund, 1886 † (Misspelling)
Genus Lejocheila Paetel, 1875 (Misspelling)
Genus Lephrobolus Paetel, 1875 (Misspelling)
Genus Leptochilus Cossmann, 1909 † (Unjustified (?) emendation)
Genus Leroyia Bourguignat, 1887 (Misspelling)
Genus Leucochilus Böttger in Martens, 1880 (Suppressed name (ICZN))
Genus Leucochroopis Pfeffer, 1929 † (Misspelling)
Genus Leucochylus Wenz, 1921 (Misspelling)
Genus Leucotus Sowerby, 1842 accepted as Leucotis Swainson, 1840 accepted as Vanikoro Quoy & Gaimard, 1832
Genus Leveilleia Cossmann, 1892 † (Unjustified (?) emendation)
Genus Lia Mörch, 1852 (Unjustified (?) emendation)
Genus Libratuta Cossmann, 1912 (Misspelling)
Genus Licarca Paetel, 1875 (Misspelling)
Genus Limacias Binney, 1879 (Misspelling)
Genus Limigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Limnaea Agassiz, 1846 (Unjustified (?) emendation)
Genus Limnaeodorma Schaufuss, 1869 (Misspelling)
Genus Limnium Oken, 1815 (Published in a rejected work (ICZN))
Genus Limnoarca Paetel, 1875 (Misspelling)
Genus Limnoderma Herrmannsen, 1847 (Misspelling)
Genus Limnostriata Paetel, 1875 (Misspelling)
Genus Lincurius Paetel, 1875 (Misspelling)
Genus Liochila Martens in Albers, 1860 (Misspelling)
Genus Liogryphaea Fischer, 1886 †
Genus Liogryphea Douvillé, 1904 † accepted as Liogryphaea Fischer, 1886 † (Misspelling)
Genus Lira Paetel, 1875 (Misspelling)
Genus Liriodon Bronn, 1837-38 † (Misspelling)
Genus Lirofusus Cossmann, 1901 † (Misspelling)
Genus Liroscaphe Paetel, 1875 (Misspelling)
Genus Lithocardita Paetel, 1875 (Misspelling)
Genus Lithochlypus Porro, 1841 (Misspelling)
Genus Lithoclyphus Paetel, 1875 (Misspelling)
Genus Lithoclyptus Schmidt, 1847 (Misspelling)
Genus Lithoclypus Cristofori & Jan, 1832 (Misspelling)
Genus Lithocystis Godwin-Austen, 1882 (Misspelling)
Genus Lithodaphus Paetel, 1875 (Misspelling)
Genus Lithogliphus Loerenthey, 1894 (Misspelling)
Genus Lithoglyptus Paetel, 1875 (Misspelling)
Genus Litholepas Gray, 1847 (Misspelling)
Genus Lithoplyphus Paetel, 1875 (Misspelling)
Genus Litoglyphus Stefani, 1880 (Misspelling)
Genus Littea Forbes & McAndrew, 1846 (Misspelling)
Genus Livanhacia Pilsbry, 1902 (Misspelling)
Genus Livia Paetel, 1875 (Misspelling)
Genus Loccardia Paetel, 1888 (Misspelling)
Genus Logigo Robson, 1926 (Misspelling)
Genus Loligo Schneider, 1784 (Not validly published)
Genus Lomatostoma Agassiz, 1846 (Unjustified (?) emendation)
Genus Lonosilla Paetel, 1875 (Misspelling)
Genus Lopedusaria Westerlund, 1901 (Misspelling)
Genus Lophirus Paetel, 1875 (Misspelling)
Genus Lophurus Gray, 1847 (Misspelling)
Genus Lorentheya Loerenthey, 1902 † accepted as Loerentheya Lörenthey, 1902 †
Genus Lörentheya Lörenthey, 1902 † accepted as Loerentheya Lörenthey, 1902 †
Genus Lowea Folin & Bérillon, 1878 (Unjustified (?) emendation)
Genus Lucinigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Lucitites Paetel, 1875 (Misspelling)
Genus Lurama Caziot, 1903 (Misspelling)
Genus Lutrarigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Lychas Paetel, 1875 † (Misspelling)
Genus Lycodes Eastman in Eastman-Zittel, 1900 † (Misspelling)
Genus Lymnaea Oken, 1815 (Published in a rejected work (ICZN))
Genus Lymneigenus Renier, 1804 (Published in a rejected work (ICZN))
Genus Lymneum Gray, 1847 (Misspelling)
Genus Lymnium Oken, 1815 (Published in a rejected work (ICZN))
Genus Lymnoderma Gray, 1847 (Misspelling)
Genus Lyogryphaea Couffon, 1918 † (Misspelling)
Genus Lyriodon Dunker, 1851 † (Unjustified (?) emendation)
Genus Lyriostoma Swainson, 1840 (Misspelling)
Genus Lyrodon Agassiz, 1846 † (Unjustified (?) emendation)
Genus Lyroscapha Tryon, 1883 (Unjustified (?) emendation)
Genus Lysinoë Adams, 1855 accepted as Lysinoe Adams, 1855
Genus Lythoclypus Parran, 1849 (Misspelling)
Genus Lythoglypter Paetel, 1875 (Misspelling)
Genus Macgillivraye Jousseaume, 1882 (Misspelling)
Genus Macilentina Locard, 1890 (Misspelling)
Genus Macroarion Hesse, 1926 (Unjustified (?) emendation)
Genus Macroön Pilsbry in Tryon & Pilsbry, 1891 accepted as Macroon Pilsbry in Tryon & Pilsbry, 1891
Genus Macrophyllum Paetel, 1875 (Misspelling)
Genus Macrotyhlacus Wagner, 1930 (Misspelling)
Genus Mactrigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Madagascaria Morelet, 1882 (Unjustified (?) emendation)
Genus Maerialla Keferstein, 1866 (Misspelling)
Genus Magachatina Bequaert & Clench, 1936 (Misspelling)
Genus Magillivraya Schaufuss, 1869 (Misspelling)
Genus Malania Preston, 1913 (Misspelling)
Genus Malleigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Maoria Pilsbry, 1892 (Unjustified (?) emendation)
Genus Maorina Pilsbry, 1892 (Unjustified (?) emendation)
Genus Margoran Kennard & Woodward, 1926 (Misspelling)
Genus Marianna Pilsbry in Tryon & Pilsbry, 1909 (Misspelling)
Genus Mariella Mörch, 1865 (Misspelling)
Genus Maritianana Caziot, 1910 (Misspelling)
Genus Maritiniana Caziot, 1910 (Misspelling)
Genus Martiniana Pallary, 1920 (Misspelling)
Genus Mascarenia Morelet, 1882 (Unjustified (?) emendation)
Genus Masticeulota Blume, 1925 (Misspelling)
Genus Mauretanica Kennard & Woodward, 1923 (Misspelling)
Genus Mazzania Wenz, 1923 † (Misspelling)
Genus Megachatinops Bequaert & Clench, 1936 (Misspelling)
Genus Megaptygma Conrad, 1862 (Unjustified (?) emendation)
Genus Megaspia Paetel, 1890 (Misspelling)
Genus Megasystropha Lea, 1864 (Suppressed name (ICZN))
Genus Megateuthis Carus, 1880 (Unjustified (?) emendation)
Genus Meglomastoma Klebs, 1886 † (Misspelling)
Genus Melanamara Cossmann, 1909 † (Misspelling)
Genus Melaniella Paetel, 1888 (Misspelling)
Genus Melanigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Melanites Agassiz, 1846 (Unjustified (?) emendation)
Genus Melanophasia Cossmann, 1909 † (Unjustified (?) emendation)
Genus Melanoptichya Pavlovic, 1926 † (Misspelling)
Genus Melanoptycha Tryon, 1883 † (Misspelling)
Genus Melanoptychia Pavlovic, 1926 † (Misspelling)
Genus Melarhaphis Agassiz, 1845 (Unjustified (?) emendation)
Genus Melatrina Cossmann, 1909 † (Misspelling)
Genus Mellea Paetel, 1875 (Misspelling)
Genus Mendaña Baker, 1938 accepted as Mendana Baker, 1938
Genus Meretriciana Locard, 1890 (Misspelling)
Genus Merionassa Simroth in Bronn, 1907 (Misspelling)
Genus Mesasystropha Crosse, 1868 (Misspelling)
Genus Mesembrionis Hall, 1867 (Misspelling)
Genus Mesochilus Cossmann, 1909 † (Unjustified (?) emendation)
Genus Metacalycoceras Spath, 1926 † accepted as Calycoceras Hyatt in Eastman-Zittel, 1900 †
Genus Metafusus Paetel, 1875 (Misspelling)
Genus Metharena Crosse, 1872 (Misspelling)
Genus Metodonta Pilsbry, 1895 (Misspelling)
Genus Micans Cossmann, 1899 † (Misspelling)
Genus Migonitis Rafinesque, 1815 (Misspelling)
Genus Milne-Edwardsia Bourguignat, 1877 accepted as Milneedwardsia Bourguignat, 1877
Genus Milneedwardsiana Bourguignat, 1877 accepted as Milneedwardsia Bourguignat, 1877
Genus Milne-Edwardsiana Bourguignat, 1877 accepted as Milneedwardsia Bourguignat, 1877
Genus Milneedwarsia Sacco, 1897 accepted as Milneedwardsia Bourguignat, 1877
Genus Milne-Edwarsia Sacco, 1897 accepted as Milneedwardsia Bourguignat, 1877
Genus Minutissima Caziot, 1910 (Misspelling)
Genus Minyongia Godwin-Austen, 1916 (Misspelling)
Genus Miraclis Cossmann, 1912 † (Misspelling)
Genus Mitrellina Paetel, 1875 (Misspelling)
Genus Mitrigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Modioligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Mojsissovicsia Gerhardt, 1897 † (Misspelling)
Genus Molengraafites Diener, 1915 † (Misspelling)
Genus Monetaria Jousseaume, 1884 (Misspelling)
Genus Monodontigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Monoetia Paetel, 1890 (Misspelling)
Genus Montaguia Costa, 1866 (Misspelling)
Genus Moolengraaffites Diener, 1923 † (Misspelling)
Genus Morelitia Coates, 1925 (Misspelling)
Genus Muelleria Philippi, 1853 accepted as Mulleria Férussac, 1824
Genus Muelleria Férussac, 1824 accepted as Mulleria Férussac, 1824
Genus Mülleria Férussac, 1824 accepted as Mulleria Férussac, 1824
Genus Muricarius Cossmann, 1918 † (Misspelling)
Genus Muricigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Murleyceras Patrini, 1930 † (Misspelling)
Genus Musculites Gesner, 1758 † (unavailable name (suppressed work))
Genus Mweruëlla Haas, 1936 accepted as Mweruella Haas, 1936
Genus Myalinadonta Tryon, 1884 † (Misspelling)
Genus Myesota Suter, 1913 (Misspelling)
Genus Mygastoma Cossmann, 1918 † (Misspelling)
Genus Myisca Agassiz, 1846 (Unjustified (?) emendation)
Genus Mysia Gray, 1847 (Misspelling)
Genus Mytiligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Mytilites Agassiz, 1846 (Unjustified (?) emendation)
Genus Mytolimax Schaufuss, 1869 (Misspelling)
Genus Mytolomia Paetel, 1875 (Misspelling)
Genus Mytulites Gesner, 1758 † (unavailable name (suppressed work))
Genus Naegelia Gude, 1921 (Misspelling)
Genus Näia Swainson, 1840 accepted as Naia Swainson, 1840 accepted as Parreysia Conrad, 1853
Genus Nasopsis Moore, 1898 (Misspelling)
Genus Nassigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Natichigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Nausimacha Gistl, 1847 (Unjustified (?) emendation)
Genus Nautilites Gesner, 1758 † (unavailable name (suppressed work))
Genus Necromantes Gistl, 1848 accepted as Tritonia Cuvier, 1798
Genus Nedhamia Paetel, 1875 (Misspelling)
Genus Neilimenia Paetel, 1875 (Misspelling)
Genus Nelata Fischer, 1885 (Misspelling)
Genus Neomeklenburgia Simroth, 1920 (Misspelling)
Genus Nephteusa Monterosato, 1888 (Misspelling)
Genus Nereis Conrad, 1860
Genus Neretina Fleming, 1828 (Misspelling)
Genus Neridotonta Brusina, 1884 † (Misspelling)
Genus Neritena Swainson, 1835 (Misspelling)
Genus Neriticonus Tryon, 1883 (Misspelling)
Genus Neritiformis Paetel, 1875 (Misspelling)
Genus Neritonta Andrussov, 1923 † (Misspelling)
Genus Nevésta Barrande, 1881 † accepted as Nevesta Barrande, 1881 †
Genus Niaa Lea, 1836 accepted as Naia Swainson, 1840 accepted as Parreysia Conrad, 1853
Genus Niäa Lea, 1836 accepted as Naia Swainson, 1840 accepted as Parreysia Conrad, 1853
Genus Niaea Mörch, 1853 accepted as Naia Swainson, 1840 accepted as Parreysia Conrad, 1853
Genus Nigricula Cossmann, 1899 † (Misspelling)
Genus Nioma Gray, 1842 (Misspelling)
Genus Niona Paetel, 1887 (Misspelling)
Genus Noidea Schaufuss, 1869 (Misspelling)
Genus Nolimenia Laporte, 1843 (Misspelling)
Genus Nordenskjöldia Wilckens, 1910 accepted as Nordenskjoldia Wilckens, 1910 †
Genus Nototrema Agassiz, 1846 (Unjustified (?) emendation)
Genus Nucolopsis Woodring, 1925 † (Misspelling)
Genus Nucum Latreille, 1825 (Misspelling)
Genus Obligoptychia Westerlund, 1884 † (Misspelling)
Genus Oceania Reichenbach, 1828 (Misspelling)
Genus Odontomphalum Agassiz, 1846 (Unjustified (?) emendation)
Genus Odontosma Arango, 1865 (Misspelling)
Genus Odontostoma Agassiz, 1846 (Unjustified (?) emendation)
Genus Odontotropis Agassiz, 1846 (Unjustified (?) emendation)
Genus Odostoncopsis Cossmann, 1901 † (Misspelling)
Genus Odostonopsis Blanckenhorn, 1927 † (Misspelling)
Genus Olygoptychia Paetel, 1889 † (Misspelling)
Genus Onistia Mörch, 1865 (Misspelling)
Genus Onustis Paetel, 1875 (Misspelling)
Genus Ophigyra Paetel, 1875 (Misspelling)
Genus Ophiodermis Agassiz, 1846 (Unjustified (?) emendation)
Genus Ophiogra Pfeiffer, 1879 (Misspelling)
Genus Ophyogyra Miller, 1878 (Misspelling)
Genus Opiliolimax Wenz, 1923 † (Misspelling)
Genus Opipterus Blainville, 1825 (Misspelling)
Genus Orbitulites Griffith & Pidgeon, 1834 (Misspelling)
Genus Orbulita Fleming, 1828 (Misspelling)
Genus Orpharus Hall, 1867 (Misspelling)
Genus Orthalycoeus Ancey, 1898 (Misspelling)
Genus Orthoceralites Stoppani, 1857 † (Misspelling)
Genus Orthoceratitus Herrmannsen, 1847 (Misspelling)
Genus Ortholus d'Orbigny, 1850 † (Misspelling)
Genus Orthostylis Paetel, 1875 (Misspelling)
Genus Oryzosoma Pilsbry, 1891 (Misspelling)
Genus Oscaniopis Pruvot-Fol, 1933 (Misspelling)
Genus Ostracites Gesner, 1758 † (unavailable name (suppressed work))
Genus Ostreigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Otylopha Paetel, 1875 (Misspelling)
Genus Otynota Paetel, 1875 (Misspelling)
Genus Ouroteuthis Hoyle, 1909 (Unjustified (?) emendation)
Genus Ovuligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Oxychilus Pfeiffer, 1856 (Unjustified (?) emendation)
Genus Ozotis Paetel, 1875 (Misspelling)
Genus Pachites d'Orbigny, 1846 † (Misspelling)
Genus Pachyodon Stutchbury, 1842
Genus Pachystoma Fischer, 1885 (Misspelling)
Genus Pachytes Hoeninghaus, 1830 † (Misspelling)
Genus Pachytus Agassiz, 1846 † (Unjustified (?) emendation)
Genus Paclitus Herrmannsen, 1847 (Misspelling)
Genus Padola Fleming, 1822 (Misspelling)
Genus Padolia Oken, 1817 (Misspelling)
Genus Padolia Schinz in Schinz-Cuvier, 1822 (Misspelling)
Genus Padolia Oken Reichenbach, 1828 (Misspelling)
Genus Palaeaneilo Hall, 1869 † (Misspelling)
Genus Palaeoarca Paetel, 1875 † (Misspelling)
Genus Palaeonelo Reed, 1922 † (Misspelling)
Genus Palaeonilo Douvillé, 1912 † (Misspelling)
Genus Palaeonisca Diener, 1926 † (Misspelling)
Genus Palanatina Hall, 1870 (Misspelling)
Genus Palearca Eastman in Eastman-Zittel, 1900 † (Misspelling)
Genus Paleocyclophorus Wenz, 1923 † (Misspelling)
Genus Paleoneilo Girty, 1910 † (Misspelling or unjustified (?) emendation)
Genus Paleonilo Douvillé, 1912 † (Misspelling)
Genus Paleoniso Gregorio, 1930 † (Misspelling)
Genus Paleorbis Diener, 1936 † (Misspelling)
Genus Palidium Wright, 1855 (Misspelling)
Genus Pallizzolia Servain, 1891 (Misspelling)
Genus Palmaria Desmarest in Chenu, 1859 (Misspelling)
Genus Paltopleuroceras Buckman, 1898 † accepted as Pleuroceras Hyatt, 1867 †
Genus Paludellina Tryon, 1884 (Misspelling)
Genus Pandorigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Pannonia Dollfus, 1912 † (Unjustified (?) emendation)
Genus Panopeigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Papilia Pelseneer, 1889 (Misspelling)
Genus Parabalia Fischer, 1908 (Misspelling)
Genus Paracanarilla Pfeffer, 1929 † (Misspelling)
Genus Parallellipipedum Grasset, 1884 (Misspelling)
Genus Parallelopipedum Jousseaume, 1888 (Misspelling)
Genus Paratinostoma Cossmann, 1921 † (Unjustified (?) emendation)
Genus Parmaphora Bowdich, 1822 (Misspelling)
Genus Parrallelepipedum Horusitzky, 1927 (Misspelling)
Genus Patelligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Pathena Pfeiffer, 1879 (Misspelling)
Genus Paucidentata Preston, 1916 (Misspelling)
Genus Pectella Gray, 1840 (Misspelling)
Genus Pectinariopsis Andrussov, 1896 (Misspelling)
Genus Pectinatarea Cossmann, 1899 † (Misspelling)
Genus Pectinigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Pectinites Gesner, 1758 † (unavailable name (suppressed work))
Genus Pectunculigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Pectunculites Gesner, 1758 † (unavailable name (suppressed work))
Genus Pedigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Peifferia Pfeiffer, 1878 (Misspelling)
Genus Pelagia Quoy & Gaimard in d'Urville, 1833
Genus Pelagus Montfort, 1808 (Suppressed name (ICZN))
Genus Pelasgia Kobelt, 1908 (Misspelling)
Genus Pelecodites Cossmann, 1924 † (Unjustified (?) emendation)
Genus Pelenna Carus, 1868-75 (Misspelling)
Genus Peleoceras Dacqué, 1934 † (Misspelling)
Genus Pellucida Caziot, 1910 (Misspelling)
Genus Peloridoderma Agassiz, 1846 (Unjustified (?) emendation)
Genus Peltopleuroceras Trauth, 1909 † (Misspelling)
Genus Peraeonoderma Thiele, 1934 (Misspelling)
Genus Pernigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Peroneoderma Therese, 1900 (Misspelling)
Genus Perotoptera Paetel, 1875 (Misspelling)
Genus Persigula Ayres, 1916 (Misspelling)
Genus Petrellinia Crosse, 1885 † (Misspelling)
Genus Petricoligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Pettretina Wenz, 1929 † (Misspelling)
Genus Petunculites Defrance, 1826 (Misspelling)
Genus Phancroporus Cockerell, 1893 (Misspelling)
Genus Phanetia Crosse, 1875 (Misspelling)
Genus Pharetrinus Philippi, 1853 † (Misspelling)
Genus Pharetrum Keferstein, 1829 † (Misspelling)
Genus Phaselotus Tryon, 1884 (Misspelling)
Genus Phasianelligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Phicaphora Jousseaume, 1882 (Misspelling)
Genus Phillocaulis Colosi, 1922 (Misspelling)
Genus Philoceros Bronn, 1863 (Misspelling)
Genus Pholadarius Herrmannsen, 1852 (Misspelling)
Genus Pholadigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Pholalites Schläpfer, 1821 (Misspelling)
Genus Pholalithes Paetel, 1875 (Misspelling)
Genus Pholidaea Swainson, 1840 (Misspelling)
Genus Pholididaea Paetel, 1875 (Misspelling)
Genus Phryxolestes Pilsbry in Tryon & Pilsbry, 1908 (Misspelling)
Genus Phylicardium Pavlovic, 1928 † (Misspelling)
Genus Phylirine Fischer, 1883 (Misspelling)
Genus Phyllicardium Andrussov, 1903 † (Misspelling)
Genus Phymeroda Rafinesque, 1820 (Misspelling)
Genus Picaenia Cossmann, 1919 † (Misspelling)
Genus Piesotrobelus Stolley, 1919 † (Misspelling)
Genus Piestobelus Cossmann, 1915 † (Misspelling)
Genus Pilidium Fischer, 1885 (Unjustified (?) emendation)
Genus Pindium Humphreys, 1845 (Misspelling)
Genus Pinnigena Agassiz, 1846 (Unjustified (?) emendation)
Genus Pinnigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Pinnites Gesner, 1758 † (unavailable name (suppressed work))
Genus Pirella Mayer, 1853 (Misspelling)
Genus Piscimaliana Locard, 1890 (Misspelling)
Genus Pisetrobelus Buelow-Trummer, 1920 † (Misspelling)
Genus Pithys Pease, 1870 (Misspelling)
Genus Pitonellus Sowerby, 1839 † (Misspelling)
Genus Pitonillus Férussac, 1822 † (Misspelling)
Genus Pitonnillus de Montfort, 1810 † (Misspelling)
Genus Pittonnillus d'Orbigny, 1852 † (Misspelling)
Genus Piunigena Cossmann, 1915 † (Misspelling)
Genus Placobranchopsis Verrill, 1901 (Misspelling)
Genus Plagiadacna Dollfus, 1905 (Misspelling)
Genus Plagiotheutis Uhlig, 1893 † (Misspelling)
Genus Plagistomus Paetel, 1875 (Misspelling)
Genus Planatella Clessin, 1876 accepted as Helicella Férussac, 1821
Genus Plancuna Renier, 1807 (Misspelling)
Genus Plancunigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Planorbigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Planospirigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Planulites Lamarck, 1801 (Suppressed name (ICZN))
Genus Plasmites Dacqué, 1934 † (Misspelling)
Genus Platilites Paetel, 1875 (Misspelling)
Genus Platopsis Cossmann, 1899 † (Misspelling)
Genus Platyiris Agassiz, 1846 (Unjustified (?) emendation)
Genus Platystomella Lindström, 1884 (Unjustified (?) emendation)
Genus Platytozon Kobelt, 1886 (Misspelling)
Genus Plecticolimax Tryon, 1884 (Misspelling)
Genus Plectophorus Gray, 1821 (Misspelling)
Genus Plectostylos Oppenheim, 1890 (Misspelling)
Genus Pledostoma Crosse, 1868 (Misspelling)
Genus Pleuropes Paetel, 1875 (Misspelling)
Genus Pleurotomigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Plicatuligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Pliomeroceras Sobolew, 1914 † (Published in a rejected work (ICZN))
Genus Plioptychia Frankenberger, 1916 (Unjustified (?) emendation)
Genus Plistoptychia Lindholm, 1924 (Misspelling)
Genus Plocarchia Paetel, 1875 (Misspelling)
Genus Plotogyra Jousseaume, 1884 (Misspelling)
Genus Plyconites Douvillé, 1887 † (Misspelling)
Genus Podangia Ghosh, 1912 (Misspelling)
Genus Poliaspoides Nevukk, 1878 (Misspelling)
Genus Polygingigma Paetel, 1875 (Misspelling)
Genus Polyodontiana Caziot, 1910 (Misspelling)
Genus Polyphema d'Orbigny, 1846 (Misspelling)
Genus Polyptchus Harris & Hodson, 1922 † (Misspelling)
Genus Polyptychophora Wagner, 1921 (Unjustified (?) emendation)
Genus Polytrophis Ulrich & Scofield, 1897 † (Misspelling)
Genus Pompilius Oken, 1817 (Misspelling)
Genus Pompilus Schneider, 1784 (Not validly published)
Genus Ponderosina Locard, 1884 (Misspelling)
Genus Pontia Paetel, 1875 (Misspelling)
Genus Popipinites Kutassy, 1933 † (Misspelling)
Genus Popula Caziot, 1912 (Misspelling)
Genus Porcelana Blainville, 1826 (Misspelling)
Genus Porcellana Müller, 1766 (Published in a rejected work (ICZN))
Genus Porcellanites Gesner, 1758 † (unavailable name (suppressed work))
Genus Porcellaria Paetel, 1875 (Misspelling)
Genus Porodragne Reichenbach, 1828 (Misspelling)
Genus Porphyrides Paetel, 1875 (Misspelling)
Genus Posteobranchus Gray, 1847 † (Misspelling)
Genus Potamophila Agassiz, 1846 (Unjustified (?) emendation)
Genus Potamophila Sowerby, 1821 (Misspelling)
Genus Potomaclis Stache, 1880 † (Misspelling)
Genus Praalimax Hesse, 1926 (Misspelling)
Genus Praecanariella Pfeffer, 1929 † (Misspelling)
Genus Pregistoma Pfeiffer, 1853 (Misspelling)
Genus Preteobullia Gregorio, 1882 † (Misspelling)
Genus Procampylea Suklje, 1920 † (Misspelling)
Genus Procerulina Westerlund, 1887 (Misspelling)
Genus Prolepsis Mabille, 1870 (Misspelling)
Genus Propalaeonerica Diener, 1926 † (Misspelling)
Genus Prosadacna Fischer, 1886 (Misspelling)
Genus Protensia Philippi, 1853 (Misspelling)
Genus Protomeroceras Sobolew, 1914 † (Published in a rejected work (ICZN))
Genus Protoschizodon Cossmann, 1912 † (Unjustified (?) emendation)
Genus Prototeathis Couffon, 1918 † (Misspelling)
Genus Proxenula Férussac, 1820 (Misspelling)
Genus Prozenula Paetel, 1888 (Misspelling)
Genus Pryamus Sismonda, 1842 (Misspelling)
Genus Psamotella Fischer, 1887 (Misspelling)
Genus Psedogaudryceras Shimizu, 1935 (Misspelling)
Genus Pseudenania Ehrmann, 1927 † (Misspelling)
Genus Pseudoammonites Bronn, 1836 (Misspelling)
Genus Pseudodontideus Thiele, 1934 (Misspelling)
Genus Pseudogardenia Tomlin, 1930 † accepted as Schlueteria Rollier, 1922 †
Genus Pseudoleigotella Cossmann, 1919 † (Misspelling)
Genus Pseudomulleria Pilsbry, 1911 accepted as Pseudomuelleria Pilsbry, 1911
Genus Pseudomülleria Pilsbry, 1911 accepted as Pseudomuelleria Pilsbry, 1911
Genus Pseudomuseum Clark, 1918 † (Misspelling)
Genus Pseudoncylastrum Dybowski, 1911 † (Misspelling)
Genus Pseudoön Simpson, 1900 accepted as Pseudoon Simpson, 1900 accepted as Obovaria Rafinesque, 1819
Genus Psilocerosa Paetel, 1875 (Misspelling)
Genus Psilochilus Agassiz, 1846 (Unjustified (?) emendation)
Genus Ptecochilus Pfeiffer, 1856 (Misspelling)
Genus Pterocerigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Pterotropis Pilsbry in Tryon & Pilsbry, 1893 (Misspelling)
Genus Ptychomeliana Pallary, 1916 (Misspelling)
Genus Ptycodia Kobelt, 1904 (Misspelling)
Genus Puella Barrande, 1881 (Misspelling)
Genus Pugili Paetel, 1875 (Misspelling)
Genus Punctisalcata Wagner, 1905 (Misspelling)
Genus Pupigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Pupilia Cossmann, 1917 (Misspelling)
Genus Pupillaea Philippi, 1844 (Misspelling)
Genus Pupillea Carpenter, 1861 (Misspelling)
Genus Purpurites Gesner, 1758 † (unavailable name (suppressed work))
Genus Pyramidelligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Pyrazus Gray, 1841 (Misspelling)
Genus Pysetomya Ulrich, 1893 † (Misspelling)
Genus Pythohelix Swainson, 1840 (Misspelling)
Genus Pytis Schmeltz, 1879 (Misspelling)
Genus Pytohelix Mörch, 1852 (Misspelling)
Genus Pyxes Paetel, 1875 (Misspelling)
Genus Radiolithigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Raphanistes Bronn, 1838 (Misspelling)
Genus Raphidiella Maltzan, 1886 (Misspelling)
Genus Rayiana Germain, 1904 (Unjustified (?) emendation)
Genus Reghostoma Troschel, 1856 (Misspelling)
Genus Registana Hall, 1867 (Misspelling)
Genus Registoma Hasselt, 1824 (Misspelling)
Genus Reineckeceras Gillet, 1924 † accepted as Remeleceras Hyatt, 1894 †
Genus Remeléceras Hyatt, 1894 † accepted as Remeleceras Hyatt, 1894 †
Genus Remeleoceras Hyatt in Eastman-Zittel, 1900 † accepted as Remeleceras Hyatt, 1894 †
Genus Reticulata Frierson, 1927 (Misspelling)
Genus Rhabdoëna Kobelt in Martini & Chemnitz, 1902 accepted as Rhabdoena Kobelt in Martini & Chemnitz, 1902
Genus Rhabdotacra Kobelt & Möllendorff, 1898 (Misspelling)
Genus Rhabotakra Caziot, 1910 (Misspelling)
Genus Rhachisellus Bourguignat, 1889 (Misspelling)
Genus Rhaphanister Montfort, 1808 (Misspelling)
Genus Rhegistoma Martens, 1867 (Unjustified (?) emendation)
Genus Rhegostoma Agassiz, 1846 (Unjustified (?) emendation)
Genus Rheinhardtia Tryon, 1884 (Misspelling)
Genus Rhetites Cossmann, 1900 † (Misspelling)
Genus Rhexiostoma Paetel, 1875 (Misspelling)
Genus Rhexistoma Herrmannsen, 1848 (Unjustified (?) emendation)
Genus Rhinodomus Swainson, 1840 (Misspelling)
Genus Rhombochiton Lindström, 1884 (Misspelling)
Genus Rhomboideana Fagot, 1892 (Misspelling)
Genus Rhynchotheutis Collignon, 1929 † (Misspelling)
Genus Rhynocantha Bellardi, 1873 (Misspelling)
Genus Rhytiphorus Meek, 1871 † (Misspelling)
Genus Rillyia Cossmann, 1889 (Unjustified (?) emendation)
Genus Rinodomus Paetel, 1873 (Misspelling)
Genus Rochebrunia Bourguignat in Révoil, 1882 (Unjustified (?) emendation)
Genus Rossmässleriana Bourguignat, 1881 accepted as Rossmassleriana Bourguignat, 1881
Genus Rossmässleriana Locard, 1890 accepted as Rossmassleriana Locard, 1890
Genus Rostrotema Sykes, 1903 (Misspelling)
Genus Rotundatiana Caziot, 1910 (Misspelling)
Genus Roualtia Tryon, 1883 (Misspelling)
Genus Roxana Paetel, 1875 (Misspelling)
Genus Rufispira Paetel, 1889 (Misspelling)
Genus Rugosiuscula Caziot, 1910 (Misspelling)
Genus Rupicella Paetel, 1875 (Misspelling)
Genus Rupicillo Martens, 1869 (Misspelling)
Genus Sabinaea Adams, 1854 (Misspelling)
Genus Saepiola Quenstedt, 1849 (Misspelling)
Genus Sagittaceras Cossmann, 1921 † (Misspelling)
Genus Saint-Simonia Bourguignat, 1880 † accepted as Saintsimonia Bourguignat, 1880 †
Genus Saint-Simoniana Locard, 1889 accepted as Saintsimoniana Locard, 1889
Genus Sarcoptera Menke, 1830 (Misspelling)
Genus Saxitoniceas McLearn, 1927 (Misspelling)
Genus Scalarigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Scamnoceras Lange, 1924 † accepted as Schlotheimia Bayle, 1878 †
Genus Scansicochlea Haas, 1932 (Unjustified (?) emendation)
Genus Schafthäutlia Cossmann, 1897 † accepted as Schafthautlia Cossmann, 1897 †
Genus Scharka Barrande, 1881 † (Misspelling)
Genus Schaufhaeutlia Cipolla, 1932 † accepted as Schafthautlia Cossmann, 1897 †
Genus Schaufhautlia Cipolla, 1932 † accepted as Schafthautlia Cossmann, 1897 †
Genus Schaufhäutlia Cipolla, 1932 † accepted as Schafthautlia Cossmann, 1897 †
Genus Schizosdesma Sowerby, 1839 (Misspelling)
Genus Schluteria Rollier, 1922 † accepted as Schlueteria Rollier, 1922 †
Genus Schlüteria Rollier, 1922 † accepted as Schlueteria Rollier, 1922 †
Genus Schlutericeras Hyatt, 1903 † accepted as Schluetericeras Hyatt, 1903 †
Genus Schlutericeras Collignon, 1938 † accepted as Schluetericeras Collignon, 1938 †
Genus Schlütericeras Hyatt, 1903 † accepted as Schluetericeras Hyatt, 1903 †
Genus Schlütericeras Collignon, 1938 † accepted as Schluetericeras Collignon, 1938 †
Genus Scutigeratus Paetel, 1875 (Misspelling)
Genus Selenomphala Aldrich, 1898 (Misspelling)
Genus Selleia Dollfus, 1912 † (Misspelling)
Genus Semicorum Pilsbry, 1890 (Misspelling)
Genus Sepiola Schneider, 1784 (Not validly published)
Genus Sepiolithes d'Orbigny, 1845 † (Misspelling)
Genus Serbendulus Pfeiffer, 1879 (Misspelling)
Genus Serinus Preston, 1912 (Misspelling)
Genus Serma Cossmann, 1909 † (Misspelling)
Genus Sertodaria Oken, 1817 (Misspelling)
Genus Servitor Barrande, 1881 (Misspelling)
Genus Sigaretigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Silex Quoy & Gaimard, 1835 (Misspelling)
Genus Siliquarigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Simplegade Reichenbach, 1828 (Misspelling)
Genus Simplegadus Bronn, 1836 (Misspelling)
Genus Sinemuria Christol, 1841 † (Suppressed name (ICZN))
Genus Sinicolo Gude, 1902 (Misspelling)
Genus Sinochilus Cossmann, 1896 † (Misspelling)
Genus Sinugera Paetel, 1875 (Misspelling)
Genus Sinugigera Jousseaume, 1882 (Misspelling)
Genus Siphonocyclotus Dautzenberg & Fischer, 1906 (Misspelling)
Genus Siphonostylus Kobelt, 1897 (Misspelling)
Genus Sistenope Dall, 1918 (Misspelling)
Genus Solarigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Solenigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Sometus Pilsbry in Tryon & Pilsbry, 1895 (Misspelling)
Genus Sormetus Blainville, 1824 (Misspelling)
Genus Soror Barrande, 1881 † (Misspelling)
Genus Sphaeromorphides Cossmann, 1922 † (Misspelling)
Genus Sphaerula Agassiz, 1846 (Unjustified (?) emendation)
Genus Spio Agassiz, 1846 (Unjustified (?) emendation)
Genus Spirobula Fulton, 1922 (Misspelling)
Genus Spirularius Duméril, 1806 accepted as Spirula Lamarck, 1799
Genus Spoedylolithus Paetel, 1875 (Misspelling)
Genus Spondeana Germain, 1904 (Unjustified (?) emendation)
Genus Spondyligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Sponsa Barrande, 1881 (Misspelling)
Genus Sporodiscus Clessin, 1877 (Misspelling)
Genus Stalioia Fischer, 1885 † (Unjustified (?) emendation)
Genus Staliola Eastman in Eastman-Zittel, 1900 † (Misspelling)
Genus Stalion Martens, 1875 † (Misspelling)
Genus Stalivia Plateau, 1898 † (Misspelling)
Genus Stangicola Paetel, 1875 (Misspelling)
Genus Stauntonites Diener, 1915 † (Misspelling)
Genus Stegalomphalus Monterosato, 1917 † (Misspelling)
Genus Stegostephanus Dacqué, 1934 † (Misspelling)
Genus Stephyllia Paetel, 1875 (Misspelling)
Genus Stercopoma Caziot, 1910 (Misspelling)
Genus Steuroceras Weaver, 1931 † (Misspelling)
Genus Stobilus Adams, 1855 (Misspelling)
Genus Stodomonta Jousseaume, 1882 (Misspelling)
Genus Stolidomia Dalton, 1878 † (Misspelling)
Genus Stoliodoma Wenz, 1920 † (Misspelling)
Genus Stoliodomopsis Wenz, 1920 (Misspelling)
Genus Stoliva Wenz, 1926 † (Misspelling)
Genus Stomadon Pictet & Campiche, 1863 † (Misspelling)
Genus Stomatiigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Stomatopsidea Cossmann, 1909 † (Unjustified (?) emendation)
Genus Stopelophila Paetel, 1873 (Misspelling)
Genus Striatella Pilsbry, 1895 (Misspelling)
Genus Strigiliaria Kennard & Woodward, 1923 (Misspelling)
Genus Strombigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Strombilus Gray, 1847 (Misspelling)
Genus Strombosa Gistl, 1848 (Unjustified (?) emendation)
Genus Stroptosiphon Cossmann, 1901 † (Misspelling)
Genus Struthiola Whitelegge, 1889 (Misspelling)
Genus Sulcolarinula Wenz, 1923 † (Misspelling)
Genus Surcusofusus Cossmann, 1897 † (Misspelling)
Genus Susaria Bronn, 1863 (Misspelling)
Genus Symplegades Berthold in Latreille, 1827 (Misspelling)
Genus Symplegas Agassiz, 1846 (Unjustified (?) emendation)
Genus Sympulum Rochebrune, 1882 (Misspelling)
Genus Tachychlamys Paetel, 1889 (Misspelling)
Genus Tallepus Paetel, 1875 (Misspelling)
Genus Tallopia Mörch, 1852 (Misspelling)
Genus Tanausia Dybowski, 1912 (Misspelling)
Genus Tapsia Grandidier, 1887 (Misspelling)
Genus Telebris Paetel, 1875 (Misspelling)
Genus Telephora Hoffmannsegg, 1818 (Misspelling)
Genus Teliostoma Cossmann, 1893 † (Misspelling)
Genus Tellinigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Telonentiana Caziot, 1910 (Misspelling)
Genus Tephrites Paetel, 1875 (Misspelling)
Genus Terebelligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Terebrigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Teredigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Teredolithes Herrmannsen, 1852 † (Misspelling)
Genus Testacelligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Testacina Binney, 1879 (Misspelling)
Genus Thalamule Reichenbach, 1828 (Misspelling)
Genus Thalassides Berger, 1833 (Suppressed name (ICZN))
Genus Thalassites Quenstedt, 1843
Genus Thalassus Oken, 1815 (Misspelling)
Genus Thallopus Paetel, 1875 (Misspelling)
Genus Thalopia Paetel, 1888 (Misspelling)
Genus Thecothera Agassiz, 1846 (Unjustified (?) emendation)
Genus Thelodonta Herrmannsen, 1849 (Unjustified (?) emendation)
Genus Thiarella Swainson, 1840 (Misspelling)
Genus Thiatisa Gray, 1847 (Misspelling)
Genus Thicolea Gray, 1847 (Misspelling)
Genus Thisoa Herrmannsen, 1849 (Unjustified (?) emendation)
Genus Thompsonia Pilsbry, 1888 (Misspelling)
Genus Throculus Picaglia, 1892 (Misspelling)
Genus Tiariconcha Beushausen, 1895 † (Misspelling)
Genus Timorenia Swainson, 1840 (Misspelling)
Genus Timorienna Griffith & Pidgeon, 1834 (Misspelling)
Genus Timoriensis Rang, 1829 (Misspelling)
Genus Tinneyea Cossmann, 1909 † (Misspelling)
Genus Tirannites Link, 1830 (Misspelling)
Genus Tmetocephalites Cossmann, 1924 † (Unjustified (?) emendation)
Genus Tomiger Leach, 1815 † (Misspelling)
Genus Tomigeres Leach, 1815 † (Misspelling)
Genus Tomocera Desmarest in Chenu, 1858 † (Misspelling)
Genus Tomogaenus Desmarest in Chenu, 1859 † (Misspelling)
Genus Tomogera d'Orbiguy, 1852 † (Misspelling)
Genus Tomogerus Blainville, 1824 † (Misspelling)
Genus Tornatellinoides Pfeiffer, 1877 (Misspelling)
Genus Törnquistes Lemoine, 1910 † accepted as Tornquistes Lemoine, 1910 †
Genus Tourameria Paetel, 1875 (Misspelling)
Genus Tournoneria Simroth in Bronn, 1907 (Misspelling)
Genus Toxosma Whitaker, 1875 † (Misspelling)
Genus Toxosphinctes Buckman, 1923 † (Suppressed name (ICZN))
Genus Trachybaikalia Dall, 1877 † (Unjustified (?) emendation)
Genus Tremessa Rafinesque, 1820 (Misspelling)
Genus Trepidulana Caziot, 1910 (Misspelling)
Genus Tretraspis Heynemann, 1906 (Misspelling)
Genus Trickella Nevill, 1878 (Misspelling)
Genus Tridacnigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Triduchiobaicalia Dybowski, 1911 (Unjustified (?) emendation)
Genus Trigonigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Trigonocaelix Conrad, 1865 (Misspelling)
Genus Trigonocelius Paetel, 1875 (Misspelling)
Genus Trigonocoelius Bronn, 1838 (Misspelling)
Genus Tripter Rang, 1829 (Misspelling)
Genus Tripteres Gray, 1840 (Misspelling)
Genus Tripteris Menke, 1830 (Misspelling)
Genus Triptichia Clessin, 1879 (Misspelling)
Genus Tritonifusus White, 1887 (Misspelling)
Genus Trocatella Collinge, 1891 (Misspelling)
Genus Trochella M'Coy in Griffith, 1844 † (Misspelling)
Genus Trochigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Trochilaea Sowerby, 1839 (Misspelling)
Genus Trochitellus Herrmannsen, 1849 (Misspelling)
Genus Trochites Gesner, 1758 † (unavailable name (suppressed work))
Genus Trophidiscus Adams, 1854 (Misspelling)
Genus Tropidocochtis Locard, 1899 (Misspelling)
Genus Tropodiscus Clessin, 1877 (Misspelling)
Genus Tuba Barrande in Verneuil, 1848 †
Genus Tubulana Bivona-Bernardi, 1832 (Misspelling)
Genus Tudora Pallary, 1912 † (Misspelling)
Genus Tulbaghina Gude, 1921 (Misspelling)
Genus Turbinelligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Turbinia Dollfus, 1919 † (Misspelling)
Genus Turbinigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Turricola Issel, 1885 (Misspelling)
Genus Tylophorites Cossmann, 1922 † (Unjustified (?) emendation)
Genus Tylotechus Möllendorff, 1901 (Misspelling)
Genus Tysoa de Serres, 1840 (Misspelling)
Genus Ullostoma Paetel, 1875 (Misspelling)
Genus Ungulinigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Unico Reider & Hahn, 1831 (Misspelling)
Genus Unifasciatiana Caziot, 1910 (Misspelling)
Genus Uniigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Unino Fabricius, 1823 (Misspelling)
Genus Unionopsis Meek, 1876 † (Misspelling)
Genus Upsilidon Haas, 1932 (Misspelling)
Genus Urosica Vincent, 1930 † (Misspelling)
Genus Vaginopsis Colosi, 1922 (Misspelling)
Genus Valvarius Paetel, 1875 (Misspelling)
Genus Velania Munier-Chalmas, 1884 (Misspelling)
Genus Vendrysia Pilsbry, 1903 (Misspelling)
Genus Venericardigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Venerigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Ventricosiana Caziot, 1908 (Misspelling)
Genus Ventricosina Locard, 1884 (Misspelling)
Genus Venusites de Verneuil, 1848 † (Misspelling)
Genus Vermicularigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Vidantius Paetel, 1875 (Misspelling)
Genus Villiersia Locard, 1886 (Unjustified (?) emendation)
Genus Vincelotiana Germain, 1904 (Unjustified (?) emendation)
Genus Viquesnella Schaufuss, 1869 (Misspelling)
Genus Viquesnilia Paetel, 1889 (Misspelling)
Genus Voloulina Stoliczka, 1906 † (Misspelling)
Genus Volutigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Volutiles Paetel, 1875 (Misspelling)
Genus Volutites Gesner, 1758 † (unavailable name (suppressed work))
Genus Volutithes Swainson, 1835 (Misspelling)
Genus Volvarigenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Vorticiaca Caziot, 1910 (Misspelling)
Genus Vulpicella Cossmann, 1889 (Misspelling)
Genus Vulselligenus Renier, 1807 (Published in a rejected work (ICZN))
Genus Westerina Pruvot-Fol, 1934 (Misspelling)
Genus Westeruia Rang, 1829 (Misspelling)
Genus Wilkinsonea Carus in Carus & Gerstaecker, 1868-75 (Misspelling)
Genus Wilkinsonia Simroth in Bronn, 1907 (Misspelling)
Genus Wiltshireia Buckman, 1904 † (Unjustified (?) emendation)
Genus Wrigthia Gemmellaro, 1887 (Misspelling)
Genus Wustia Honigmann, 1909 accepted as Wuestia Honigmann, 1909
Genus Wüstia Honigmann, 1909 accepted as Wuestia Honigmann, 1909
Genus Wyville-Thomsonia Crosse, 1885 accepted as Wyvillethomsonia Crosse, 1885
Genus Xerofusa Kobelt, 1904 (Misspelling)
Genus Xeroloeta Monterosato, 1894 (Misspelling)
Genus Xeropthychia Lamy, 1911 (Misspelling)
Genus Xeroptychia Westerlund, 1902 (Misspelling)
Genus Xiphotheutis Schwetzoff, 1913 † (Misspelling)
Genus Xya Herrmannsen, 1849 (Misspelling)
Genus Xyclohelyx Paetel, 1888 (Misspelling)
Genus Xyrama Herrmannsen, 1849 (Misspelling)
Genus Zaira Simpson, 1900 (Misspelling)
Genus Zeanoë Gray, 1852 accepted as Zeanoe Gray, 1852
Genus Zenoë Gray, 1852 accepted as Zenoe Gray, 1852
Genus Zonyalinia Böttger, 1884 † (Misspelling)
Genus Zugocosmoceras Stoll, 1934 † (Unjustified (?) emendation)
Genus Zygophorites Cossmann, 1924 † (Unjustified (?) emendation)

Genus Abadieceras Collignon, 1950 † (uncertain, unassessed)
Genus Abathoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Abbadia Bourguignat, 1883 (uncertain, unassessed)
Genus Abbreviatiana Bourguignat, 1881 (uncertain, unassessed)
Genus Abiella Ragosin, 1933 † (uncertain, unassessed)
Genus Acaenoplax Sutton, Briggs, Siveter & Siveter, 2001 † (uncertain, unassessed)
Genus Acalliana Bourguignat, 1881 (uncertain, unassessed)
Genus Acamas de Montfort, 1808 (uncertain, unassessed)
Genus Acanthennea Martens, 1898 (uncertain, unassessed)
Genus Acanthina Siebold, 1845 (uncertain, unassessed)
Genus Acanthis de Serres, 1816 (uncertain, unassessed)
Genus Acanthochitontypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Acanthochitus Philippi, 1844 (uncertain, unassessed)
Genus Acantholeaia Almeida, 1950 † (uncertain, unassessed)
Genus Acanthophiceras Diener, 1916 † (uncertain, unassessed)
Genus Acanthopleuratypus Bergenhavn, 1930 (uncertain, unassessed)
Genus Acanthopupa Wenz, 1914 (uncertain, unassessed)
Genus Acanthosphaerites Rollier, 1922 † (uncertain, unassessed)
Genus Acanthotropis Haas, 1939 (uncertain, unassessed)
Genus Acardia Schinz in Cuvier, 1822 (uncertain, unassessed)
Genus Acardo Herrmannsen, 1846 (uncertain, unassessed)
Genus Acavella Jousseaume, 1894 (uncertain, unassessed)
Genus Acerosiana Bourguignat, 1880 (uncertain, unassessed)
Genus Achatenilla Swainson, 1840 (uncertain, unassessed)
Genus Achatinella Schlüter, 1838 (uncertain, unassessed)
Genus Achatinelloides Nevill, 1878 (uncertain, unassessed)
Genus Achatinus de Montfort, 1810 (uncertain, unassessed)
Genus Achatium Link, 1807 (uncertain, unassessed)
Genus Achelois de Montfort, 1808 (uncertain, unassessed)
Genus Achilleia Renz, 1913 † (uncertain, unassessed)
Genus Achoanomphalus Lindholm, 1909 (uncertain, unassessed)
Genus Aciculariana Bourguignat, 1884 (uncertain, unassessed)
Genus Aciculina Westerlund, 1887 (uncertain, unassessed)
Genus Aciedentata Dybowski & Grochmalicki, 1923 (uncertain, unassessed)
Genus Aclisoides Donald, 1898 † (uncertain, unassessed)
Genus Acmopupa Böttger, 1889 (uncertain, unassessed)
Genus Acosmiana Fagot, 1883 (uncertain, unassessed)
Genus Acrenellus Paetel, 1875 (uncertain, unassessed)
Genus Acroceramus Heinz, 1932 † (uncertain, unassessed)
Genus Acrochasma Reuss, 1860 (uncertain, unassessed)
Genus Acrochordiceras Waagen, 1895 † (uncertain, unassessed)
Genus Acrochordiceroides Strand, 1929 † (uncertain, unassessed)
Genus Acroeuxina Böttger, 1877 † (uncertain, unassessed)
Genus Acrophaedusa Böttger, 1877 † (uncertain, unassessed)
Genus Acrophlyctis Cossmann, 1888 (uncertain, unassessed)
Genus Acrostele Wenz, 1925 (uncertain, unassessed)
Genus Acrotrema Cossmann, 1889 (uncertain, unassessed)
Genus Acroxiana Bourguignat, 1884 (uncertain, unassessed)
Genus Actaeon Grateloup, 1836 (uncertain, unassessed)
Genus Actaeon Oken, 1815 (uncertain, unassessed)
Genus Acteon Fleming, 1828 (uncertain, unassessed)
Genus Actinaria Pfeiffer, 1855 (uncertain, unassessed)
Genus Actinoceratites Bronn, 1834 (uncertain, unassessed)
Genus Actinoceratites Schrammen, 1928 † (uncertain, unassessed)
Genus Actinochlamys Rovereto, 1898 (uncertain, unassessed)
Genus Actinodesma Miller, 1877 † (uncertain, unassessed)
Genus Actinodontophora Ichikawa, 1951 † (uncertain, unassessed)
Genus Actinoglypta Agassiz (uncertain, unassessed)
Genus Actinomya Mayer, 1870 (uncertain, unassessed)
Genus Actinopecten Bonarelli, 1951 † (uncertain, unassessed)
Genus Actinophorus Meek, 1864 (uncertain, unassessed)
Genus Acuaria Zakrzewski, 1886 (uncertain, unassessed)
Genus Aculea Perry, 1810 (uncertain, unassessed)
Genus Aculeatiana Caziot, 1910 (uncertain, unassessed)
Genus Acura Adams, 1855 (uncertain, unassessed)
Genus Acutana Fagot, 1891 (uncertain, unassessed)
Genus Acutiana Fagot, 1883 (uncertain, unassessed)
Genus Acuticylindra Iredale, 1929 (uncertain, unassessed)
Genus Acyonaea Deshayes, 1830 (uncertain, unassessed)
Genus Adamiana Bourguignat, 1881 (uncertain, unassessed)
Genus Adamsenida Habe in Kuroda, 1952 (uncertain, unassessed)
Genus Adelodonta Ancey, 1880 (uncertain, unassessed)
Genus Adelomorpha Tapparone-Canefri, 1886 (uncertain, unassessed)
Genus Ademitrella Ludbrook, 1941 † (uncertain, unassessed)
Genus Adenodia Dall, 1920 (uncertain, unassessed)
Genus Adeorbisina Greco, 1899 † (uncertain, unassessed)
Genus Adjua Chaper, 1885 (uncertain, unassessed)
Genus Adolfina Caziot, 1910 (uncertain, unassessed)
Genus Adolphia Stolley, 1907 † (uncertain, unassessed)
Genus Adranaria Munier-Chalmas, 1876 (uncertain, unassessed)
Genus Adriaca Westerlund, 1884 (uncertain, unassessed)
Genus Adriaria Pallary, 1917 (uncertain, unassessed)
Genus Adriella Thiele in Troschel, 1893 (uncertain, unassessed)
Genus Adspergillum Menke, 1830 (uncertain, unassessed)
Genus Advena Palmer, 1937 † (uncertain, unassessed)
Genus Adversaria Lindholm, 1925 (uncertain, unassessed)
Genus Adzvaella Kanev, 1983 † (uncertain, unassessed)
Genus Aega Hartman, 1881 (uncertain, unassessed)
Genus Aegaea Oppenheim, 1891 † (uncertain, unassessed)
Genus Aegericiana Locard, 1889 (uncertain, unassessed)
Genus Aegionia Cossmann, 1921 † (uncertain, unassessed)
Genus Aegle Oken, 1815 (uncertain, unassessed)
Genus Aegophthalmus Hesse, 1910 (uncertain, unassessed)
Genus Aemoria Beck, 1847 (uncertain, unassessed)
Genus Aenigmigulella Pilsbry & Cockerell, 1933 (uncertain, unassessed)
Genus Aeolia Anon., 1817 (uncertain, unassessed)
Genus Aequinoctia Lindholm, 1925 (uncertain, unassessed)
Genus Aeqviyoldia Soot-Ryen, 1951 (uncertain, unassessed)
Genus Aethocera Teichert & Glenister, 1954 † (uncertain, unassessed)
Genus Aetomoceras Hyatt in Eastman-Zittel, 1900 † (uncertain, unassessed)
Genus Aferulus Martens, 1897 (uncertain, unassessed)
Genus Afriboysidia Zilch, 1939 (uncertain, unassessed)
Genus Afripupa Pilsbry & Cooke, 1920 (uncertain, unassessed)
Genus Afripupilla Pilsbry, 1921 (uncertain, unassessed)
Genus Afroparreysia Haas, 1936 (uncertain, unassessed)
Genus Afropunctum Haas, 1934 (uncertain, unassessed)
Genus Afrorhytida Möllendorff, 1903 (uncertain, unassessed)
Genus Agadina Gould, 1852 (uncertain, unassessed)
Genus Agalma Martens in Albers, 1860 (uncertain, unassessed)
Genus Aganides de Montfort, 1808 (uncertain, unassessed)
Genus Aganis von Buch, 1834 (uncertain, unassessed)
Genus Agathina Rafinesque, 1831 (uncertain, unassessed)
Genus Agglutinans Wagner, 1908 (uncertain, unassessed)
Genus Aglaia Renier, 1807 (uncertain, unassessed)
Genus Aglaja Albers, 1850 (uncertain, unassessed)
Genus Agraulina Bourguignat, 1858 (uncertain, unassessed)
Genus Agrestiana Caziot, 1910 (uncertain, unassessed)
Genus Agria Matheron, 1878 † (uncertain, unassessed)
Genus Agrioicana Fagot, 1891 (uncertain, unassessed)
Genus Aidaroceras Doguzhaeva, 2002 † (uncertain, unassessed)
Genus Aidone Adams, 1853 (uncertain, unassessed)
Genus Ajkaia Tausch, 1886 † (uncertain, unassessed)
Genus Akidocheilus Shimansky, 1947 † (uncertain, unassessed)
Genus Akidocheilus Till, 1907 † (uncertain, unassessed)
Genus Alabastra Kobelt in Rossmässler, 1904 (uncertain, unassessed)
Genus Alaca Böttger, 1911 (uncertain, unassessed)
Genus Alaea Jeffreys, 1830 (uncertain, unassessed)
Genus Alastega Cherns, 1998 † (uncertain, unassessed)
Genus Alata Linck, 1783 (uncertain, unassessed)
Genus Alata Thorbiornsen, 1823 (uncertain, unassessed)
Genus Albanica Böttger, 1878 (uncertain, unassessed)
Genus Albanodelima Wagner, 1924 (uncertain, unassessed)
Genus Albiana Fagot, 1891 (uncertain, unassessed)
Genus Albinula Sterki, 1892 (uncertain, unassessed)
Genus Albisiana Bourguignat, 1884 (uncertain, unassessed)
Genus Alboceramus Heinz, 1932 † (uncertain, unassessed)
Genus Alcidia Bourguignat, 1889 (uncertain, unassessed)
Genus Alciope Adams, 1861 (uncertain, unassessed)
Genus Aldanolina Pelman, 1976 † (uncertain, unassessed)
Genus Aldrovandium Chiaje, 1844 (uncertain, unassessed)
Genus Aleatelix Iredale, 1941 (uncertain, unassessed)
Genus Algirana Caziot, 1910 (uncertain, unassessed)
Genus Algrus Gregorio, 1884 (uncertain, unassessed)
Genus Alifera Piette in d'Orbigny, 1891 † (uncertain, unassessed)
Genus Alina Récluz, 1842 (uncertain, unassessed)
Genus Alinoclithon Baker, 1923 (uncertain, unassessed)
Genus Alipes Conrad, 1865 (uncertain, unassessed)
Genus Allardia Nicolas, 1898 (uncertain, unassessed)
Genus Allisma Iredale, 1941 (uncertain, unassessed)
Genus Allixia Cossmann, 1913 (uncertain, unassessed)
Genus Allocardium Hall, 1883 † (uncertain, unassessed)
Genus Alloceramus Heinz, 1932 † (uncertain, unassessed)
Genus Allogenes Gude, 1911 (uncertain, unassessed)
Genus Alloglossa Lindström, 1868 (uncertain, unassessed)
Genus Allolaemus Pilsbry in Tryon & Pilsbry, 1895 (uncertain, unassessed)
Genus Alloptyx Pilsbry, 1953 (uncertain, unassessed)
Genus Allovirgatites Neaverson, 1925 † (uncertain, unassessed)
Genus Allportia Tenison-Woods, 1877 (uncertain, unassessed)
Genus Alocinma Annandale & Prashad, 1919 (uncertain, unassessed)
Genus Alostoma Lycett, 1850 (uncertain, unassessed)
Genus Aloysia Issel, 1907 (uncertain, unassessed)
Genus Alpecanusiana Locard, 1889 (uncertain, unassessed)
Genus Alpidelima Wagner, 1924 (uncertain, unassessed)
Genus Alpinoceras Lange, 1941 † (uncertain, unassessed)
Genus Alsatia Andreae, 1884 † (uncertain, unassessed)
Genus Alsobia Bourguignat, 1858 (uncertain, unassessed)
Genus Alstadenites Reeside, 1932 (uncertain, unassessed)
Genus Altaicola Lindholm, 1927 (uncertain, unassessed)
Genus Altavillia Gregorio, 1908 (uncertain, unassessed)
Genus Alvearella Lowe, 1852 (uncertain, unassessed)
Genus Alveolus Herrmannsen, 1846 (uncertain, unassessed)
Genus Alycaeodonta Etheridge, 1879 † (uncertain, unassessed)
Genus Amalthites Swainson, 1835 (uncertain, unassessed)
Genus Amandana Fagot, 1891 (uncertain, unassessed)
Genus Amastrella Sykes, 1900 (uncertain, unassessed)
Genus Amathusia Philippi, 1887 † (uncertain, unassessed)
Genus Ambersites Buckman, 1921 † (uncertain, unassessed)
Genus Ambipupina Iredale, 1937 (uncertain, unassessed)
Genus Amblyacum Kobelt, 1892 (uncertain, unassessed)
Genus Amblybelus Naef, 1922 † (uncertain, unassessed)
Genus Amblyceras Glocker, 1842 (uncertain, unassessed)
Genus Amblyoxyites Buckman, 1922 † (uncertain, unassessed)
Genus Amblyspira Dall in Guppy & Dall, 1896 (uncertain, unassessed)
Genus Amcleceras van Hoepen, 1942 † (uncertain, unassessed)
Genus Amenixesta Iredale, 1941 (uncertain, unassessed)
Genus Americana Clessin, 1879 (uncertain, unassessed)
Genus Ametoceras Schindewolf, 1935 † (uncertain, unassessed)
Genus Amiculatypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Amimonus de Montfort, 1808 (uncertain, unassessed)
Genus Ammonisiana Fagot, 1884 (uncertain, unassessed)
Genus Ammonoceras Lamarck, 1822 (uncertain, unassessed)
Genus Amnicana Fagot, 1892 (uncertain, unassessed)
Genus Amnicusiana Locard, 1889 (uncertain, unassessed)
Genus Ampezzanilda Bandel, 1995 † (uncertain, unassessed)
Genus Amphibina Hartmann, 1821 (uncertain, unassessed)
Genus Amphibulimus de Montfort, 1810 (uncertain, unassessed)
Genus Amphicardium Martens in Moebius, 1880 (uncertain, unassessed)
Genus Amphiopomorphites Bronn, 1836 (uncertain, unassessed)
Genus Amphiscopus Westerlund, 1887 (uncertain, unassessed)
Genus Amphitritidea Krøyer, 1847 (uncertain, unassessed)
Genus Amphitrorsus Kimakowicz, 1890 (uncertain, unassessed)
Genus Amphoreopsis Crick, 1904 (uncertain, unassessed)
Genus Amphoroceras Ulrich & Foerste, 1935 (uncertain, unassessed)
Genus Amplexis Brown, 1827 (uncertain, unassessed)
Genus Amplexites Swainson, 1835 (uncertain, unassessed)
Genus Ampliata Wagner, 1907 (uncertain, unassessed)
Genus Amplovalvata Yen, 1952 † (uncertain, unassessed)
Genus Ampullariella Raspail, 1909 (uncertain, unassessed)
Genus Ampullina Guppy, 1895 (uncertain, unassessed)
Genus Ampullopsis Repelin, 1902 (uncertain, unassessed)
Genus Ampulloscalites Wenz, 1938 † (uncertain, unassessed)
Genus Amydala Gray, 1847 (uncertain, unassessed)
Genus Anabrahmaites Yabe & Shimizu, 1924 † (uncertain, unassessed)
Genus Anacardioceras Buckman, 1923 † (uncertain, unassessed)
Genus Anadara Deshayes, 1830 † (uncertain, unassessed)
Genus Anadaria Kobelt, 1910 (uncertain, unassessed)
Genus Anadeninus Simroth in Bronn, 1912 (uncertain, unassessed)
Genus Anadontella Betekhtina in Betekhtina, Starobogatov & Jatsuk, 1987 † (uncertain, unassessed)
Genus Anadromus Sandberger, 1871 (uncertain, unassessed)
Genus Anaguadryceras Shimizu, 1935 (uncertain, unassessed)
Genus Anahedenstroemia Hyatt in Eastman-Zittel, 1900 † (uncertain, unassessed)
Genus Anakosmoceras Buckman, 1924 † (uncertain, unassessed)
Genus Anaplanulites Buckman, 1922 † (uncertain, unassessed)
Genus Anaplomya Krauss, 1843 (uncertain, unassessed)
Genus Anapuzosia Matsumoto, 1954 † (uncertain, unassessed)
Genus Anastephanites Spath, 1930 (uncertain, unassessed)
Genus Anastomopsis Sandberger, 1871 (uncertain, unassessed)
Genus Anatasia Gistl, 1848 (uncertain, unassessed)
Genus Anatola Audouin in Savigny, 1826 (uncertain, unassessed)
Genus Anaulax de Roissy, 1805 † (uncertain, unassessed)
Genus Ancaeus Adams, 1869 (uncertain, unassessed)
Genus Anceyiella Mabille, 1886 (uncertain, unassessed)
Genus Anchistoma Mörch, 1852 (uncertain, unassessed)
Genus Ancile Herrmannsen, 1846 (uncertain, unassessed)
Genus Ancilia Deshayes, 1830 (uncertain, unassessed)
Genus Ancillarites Krueger, 1823 (uncertain, unassessed)
Genus Ancomena Baker, 1931 (uncertain, unassessed)
Genus Anconia Mabille, 1886 (uncertain, unassessed)
Genus Anconia Olsson, 1931 † (uncertain, unassessed)
Genus Anculopsis Yen, 1947 † (uncertain, unassessed)
Genus Ancyclostoma Scudder, 1882 (uncertain, unassessed)
Genus Ancylorhynchus Wanner, 1902 † (uncertain, unassessed)
Genus Andamanica Wagner, 1905 (uncertain, unassessed)
Genus Andrarion Godwin-Austen, 1912 (uncertain, unassessed)
Genus Androiavites Collignon, 1936 (uncertain, unassessed)
Genus Andrussella Korobkov, 1954 † (uncertain, unassessed)
Genus Aneityopsis Grimpe & Hoffmann, 1924 (uncertain, unassessed)
Genus Anelasma Cossmann, 1889 † (uncertain, unassessed)
Genus Anevda Palmer, 1940 † (uncertain, unassessed)
Genus Angarodon Ragozin, 1935 (uncertain, unassessed)
Genus Angatubia Mendes, 1962 † (uncertain, unassessed)
Genus Angellum Miller, 1878 (uncertain, unassessed)
Genus Angeloteuthis Lang, 1928 † (uncertain, unassessed)
Genus Angigaster Pilsbry & Hirase, 1904 (uncertain, unassessed)
Genus Angistoma Fischer, 1883 (uncertain, unassessed)
Genus Angkorella Delpey, 1941 (uncertain, unassessed)
Genus Anglicana Fagot, 1891 (uncertain, unassessed)
Genus Angolaites Spath, 1932 † (uncertain, unassessed)
Genus Anguidactylites Buckman, 1926 † (uncertain, unassessed)
Genus Angulata Wagner, 1905 (uncertain, unassessed)
Genus Angulatomitrella Sacco, 1890 (uncertain, unassessed)
Genus Angulicervix Pilsbry, 1933 (uncertain, unassessed)
Genus Angulidens Pilsbry & Cooke, 1914 (uncertain, unassessed)
Genus Angulina Kobelt, 1904 (uncertain, unassessed)
Genus Angulorbis Wenz, 1941 (uncertain, unassessed)
Genus Angulorbis Yen, 1944 † (uncertain, unassessed)
Genus Angustella Waagen, 1907 † (uncertain, unassessed)
Genus Angustiscala de Boury, 1909 (uncertain, unassessed)
Genus Angustivestis Pilsbry, 1919 (uncertain, unassessed)
Genus Angustula Sterki, 1888 (uncertain, unassessed)
Genus Anisocardia Cossmann, 1886 (uncertain, unassessed)
Genus Anisoloboceras Trueman, 1918 † (uncertain, unassessed)
Genus Anisoloma Ancey, 1901 (uncertain, unassessed)
Genus Anmicola Clessin, 1885 (uncertain, unassessed)
Genus Annularella Henderson & Bartsch, 1920 (uncertain, unassessed)
Genus Annularex Bartsch, 1941 (uncertain, unassessed)
Genus Annularisca Henderson & Bartsch, 1920 (uncertain, unassessed)
Genus Annularita Henderson & Bartsch, 1920 (uncertain, unassessed)
Genus Annularops Henderson & Bartsch, 1920 (uncertain, unassessed)
Genus Annularosa Henderson & Bartsch, 1920 (uncertain, unassessed)
Genus Annulicaulis Simroth in Voeltzkow, 1913 (uncertain, unassessed)
Genus Annulifer Cossmann, 1921 † (uncertain, unassessed)
Genus Anolkoleiites Buckman, 1926 † (uncertain, unassessed)
Genus Anomalia Megerle in Rossi, 1837 (uncertain, unassessed)
Genus Anomalina Mousson in Hartmann, 1842 (uncertain, unassessed)
Genus Anomiea Herrmannsen, 1846 (uncertain, unassessed)
Genus Anomoptychus Douvillé, 1906 † (uncertain, unassessed)
Genus Anomphala Herrmannsen, 1846 (uncertain, unassessed)
Genus Anomphala Westerlund, 1886 † (uncertain, unassessed)
Genus Anomphalodes Tomlin, 1929 (uncertain, unassessed)
Genus Anomphalus Dybowski & Grochmalicki, 1925 (uncertain, unassessed)
Genus Anonica Oken, 1815 (uncertain, unassessed)
Genus Anoplax de Serres, 1829 (uncertain, unassessed)
Genus Anops d'Orbigny, 1836 (uncertain, unassessed)
Genus Anostomopsis Sandberger, 1871 (uncertain, unassessed)
Genus Anostylus Cossmann, 1896 † (uncertain, unassessed)
Genus Anotus Westerlund, 1883 (uncertain, unassessed)
Genus Ansata Herrmannsen, 1846 (uncertain, unassessed)
Genus Antalium Herrmannsen, 1846 (uncertain, unassessed)
Genus Antediplodon Marshall, 1929 † (uncertain, unassessed)
Genus Anteglosia Vokes, 1948 † (uncertain, unassessed)
Genus Anthracochiton Rochebrune, 1883 † (uncertain, unassessed)
Genus Anthraconauta Pruvost, 1930 (uncertain, unassessed)
Genus Anthracoptera Salter, 1863 † (uncertain, unassessed)
Genus Anthracosia King, 1856 (uncertain, unassessed)
Genus Anthracosphaerium Trueman & Weir, 1946 † (uncertain, unassessed)
Genus Anticalyptraea Quenstedt, 1867 (uncertain, unassessed)
Genus Antichondrus Lindholm, 1925 (uncertain, unassessed)
Genus Antidrymaeus Germain, 1907 (uncertain, unassessed)
Genus Antinous Robson, 1914 (uncertain, unassessed)
Genus Antitragus Oberwimmer, 1931 (uncertain, unassessed)
Genus Antivertigana Fagot, 1891 (uncertain, unassessed)
Genus Antychus von Meyer, 1830 (uncertain, unassessed)
Genus Aparhais Beck, 1847 (uncertain, unassessed)
Genus Apatetes Gude, 1914 (uncertain, unassessed)
Genus Apedogyria Buckman, 1899 † (uncertain, unassessed)
Genus Aperostomops Pilsbry, 1935 (uncertain, unassessed)
Genus Apertaxis Pilsbry, 1953 (uncertain, unassessed)
Genus Apertiana Caziot, 1910 (uncertain, unassessed)
Genus Apex Martens in Albers, 1860 (uncertain, unassessed)
Genus Aphallarion Pilsbry & Vanatta, 1896 (uncertain, unassessed)
Genus Aphroditiceras Mahmoud, 1955 † (uncertain, unassessed)
Genus Aphyllites Mojsisovics, 1882 † (uncertain, unassessed)
Genus Apicinana Fagot, 1891 (uncertain, unassessed)
Genus Apilas Gregorio, 1886 † (uncertain, unassessed)
Genus Apiotropis Meek, 1876 † (uncertain, unassessed)
Genus Aplodon Spix, 1827 (uncertain, unassessed)
Genus Aplostoma Moquin-Tandon, 1856 (uncertain, unassessed)
Genus Aplysiopsis Bergh, 1898 (uncertain, unassessed)
Genus Apoecus Möllendorff in Martini & Chemnitz, 1902 (uncertain, unassessed)
Genus Aposphinctoceras Neaverson, 1924 † (uncertain, unassessed)
Genus Apostrophia Ehrmann, 1927 (uncertain, unassessed)
Genus Appendiculata Ficinus, 1867 (uncertain, unassessed)
Genus Appius Menke, 1830 (uncertain, unassessed)
Genus Apricana Caziot, 1908 (uncertain, unassessed)
Genus Aprosphyma Wagner, 1920 (uncertain, unassessed)
Genus Apscheronia Andrusov, 1903 (uncertain, unassessed)
Genus Aptychoteuthis Reynès, 1879 (uncertain, unassessed)
Genus Apula Böttger, 1909 (uncertain, unassessed)
Genus Aquistratites Buckman, 1924 † (uncertain, unassessed)
Genus Arabivitrina Thiele, 1931 (uncertain, unassessed)
Genus Aradasia Gray, 1850 (uncertain, unassessed)
Genus Araucania Parodiz, 1954 (uncertain, unassessed)
Genus Araxiites Dorodnova, 1993 † (uncertain, unassessed)
Genus Arcacites Schlotheim, 1820 (uncertain, unassessed)
Genus Arcado Bruguière, 1789 (uncertain, unassessed)
Genus Arcaspidoceras Jeannet, 1951 † (uncertain, unassessed)
Genus Archaegopis Wenz, 1914 (uncertain, unassessed)
Genus Archaeodoris Smith-Kilwinning, 1900 † (uncertain, unassessed)
Genus Archaeonassa Fenton & Fenton, 1937 (uncertain, unassessed)
Genus Archaeoplecta Gude, 1911 (uncertain, unassessed)
Genus Archaeoxesta Neuenhaus, 1909 (uncertain, unassessed)
Genus Archaeozonites Sandberger, 1875 (uncertain, unassessed)
Genus Archanodon Howse, 1878 (uncertain, unassessed)
Genus Archelix Albers, 1850 (uncertain, unassessed)
Genus Archicoceratites Schrammen, 1934 † (uncertain, unassessed)
Genus Archimedes Paetel, 1875 (uncertain, unassessed)
Genus Archipelagica Böttger, 1878 (uncertain, unassessed)
Genus Architea Costa, 1869 (uncertain, unassessed)
Genus Archygromia Pfeffer, 1929 † (uncertain, unassessed)
Genus Arcicardium Fischer, 1887 (uncertain, unassessed)
Genus Arcidactylites Buckman, 1926 † (uncertain, unassessed)
Genus Arcinella Oken, 1815 (uncertain, unassessed)
Genus Arcites Martin, 1809 (uncertain, unassessed)
Genus Arclites Schläpfer, 1821 (uncertain, unassessed)
Genus Arcoptera Bittner, 1895 † (uncertain, unassessed)
Genus Arcotia Stoliczka, 1868 † (uncertain, unassessed)
Genus Arctoceras Hyatt in Eastman-Zittel, 1900 † (uncertain, unassessed)
Genus Arctocerodes Strand, 1929 † (uncertain, unassessed)
Genus Arctolimax Westerlund, 1894 (uncertain, unassessed)
Genus Arctomphalus Tolmachoff, 1926 † (uncertain, unassessed)
Genus Arctoplax Cherns, 1998 † (uncertain, unassessed)
Genus Arcturus Gray, 1839 (uncertain, unassessed)
Genus Arcuaceras Herzer, 1902 (uncertain, unassessed)
Genus Arcuatobeccus Shimansky, 1947 † (uncertain, unassessed)
Genus Arcuatomitrella Sacco, 1890 (uncertain, unassessed)
Genus Arcuatula Gugenberger, 1934 (uncertain, unassessed)
Genus Arcuceras Potonié, 1929 † (uncertain, unassessed)
Genus Arcularia Fabricius, 1823 (uncertain, unassessed)
Genus Arealiana Bourguignat, 1881 (uncertain, unassessed)
Genus Arene Conrad in Kerr, 1875 † (uncertain, unassessed)
Genus Areocuculla Cossmann, 1923 (uncertain, unassessed)
Genus Aretinula Thiele, 1934 (uncertain, unassessed)
Genus Argoceras Steinmann, 1925 (uncertain, unassessed)
Genus Argonautella Steinmann, 1925 (uncertain, unassessed)
Genus Argonautina Steinmann, 1925 (uncertain, unassessed)
Genus Argonautites de Montfort in Sonnini, 1802 (uncertain, unassessed)
Genus Argus Gray, 1847 (uncertain, unassessed)
Genus Argutarpites Buckman, 1923 † (uncertain, unassessed)
Genus Argvethites Rouchadzé, 1933 † (uncertain, unassessed)
Genus Argyroconchites Herrmannsen, 1852 (uncertain, unassessed)
Genus Argyroctenites Herrmannsen, 1852 (uncertain, unassessed)
Genus Arhouriella Geyer & Streng, 1998 † (uncertain, unassessed)
Genus Arianta Gray in Turton, 1840 (uncertain, unassessed)
Genus Arianta Beck, 1837 (uncertain, unassessed)
Genus Arietina Conrad, 1853 (uncertain, unassessed)
Genus Arigoina Caziot, 1910 (uncertain, unassessed)
Genus Arionellus Paetel, 1875 (uncertain, unassessed)
Genus Aristoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Armandia Ancey, 1883 (uncertain, unassessed)
Genus Armandiella Ancey, 1901 (uncertain, unassessed)
Genus Armiella Pilsbry, 1911 (uncertain, unassessed)
Genus Arnioceratoides Spath, 1922 † (uncertain, unassessed)
Genus Arnoldia Mayer, 1887 † (uncertain, unassessed)
Genus Arnouldia Bourguignat, 1890 † (uncertain, unassessed)
Genus Arnouldiana Locard, 1890 (uncertain, unassessed)
Genus Arpadicardium Eberzin, 1947 † (uncertain, unassessed)
Genus Arrhaphoceras Whitehouse, 1927 † (uncertain, unassessed)
Genus Arrosiana Locard, 1890 (uncertain, unassessed)
Genus Artecallosa Wagner in Martini & Chemnitz, 1908 (uncertain, unassessed)
Genus Artemiderma de Blainville, 1818 (uncertain, unassessed)
Genus Artemon Beck, 1837 (uncertain, unassessed)
Genus Artemonopsis Germain, 1908 (uncertain, unassessed)
Genus Arthropteron Rochebrune, 1904 (uncertain, unassessed)
Genus Articulipoma Bartsch, 1946 (uncertain, unassessed)
Genus Artusius Gray, 1852 (uncertain, unassessed)
Genus Asa Leach, 1847 (uncertain, unassessed)
Genus Aschera Pallary, 1939 (uncertain, unassessed)
Genus Asga Gregorio, 1885 (uncertain, unassessed)
Genus Asianites Ruzencev, 1933 (uncertain, unassessed)
Genus Asiolus Gregorio, 1890 † (uncertain, unassessed)
Genus Askoloboceras van Hoepen, 1944 † (uncertain, unassessed)
Genus Aspersiana Caziot, 1908 (uncertain, unassessed)
Genus Aspidelus Morelet, 1883 (uncertain, unassessed)
Genus Aspidotomium Degner, 1932 (uncertain, unassessed)
Genus Asselberghsia Maillieux, 1931 (uncertain, unassessed)
Genus Assiminella Monterosato, 1906 (uncertain, unassessed)
Genus Astatoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Astenothyra Annandale & Prashad, 1921 (uncertain, unassessed)
Genus Asteroconites Teller, 1885 † (uncertain, unassessed)
Genus Asthenodonta Whiteaves, 1894 (uncertain, unassessed)
Genus Asticusiana Locard, 1889 (uncertain, unassessed)
Genus Astieria Pavlov, 1891 (uncertain, unassessed)
Genus Astralium Philippi, 1847 (uncertain, unassessed)
Genus Astylophthalma Menke, 1845 (uncertain, unassessed)
Genus Atahualpa Strebel, 1910 (uncertain, unassessed)
Genus Atalanta Seeley, 1864 † (uncertain, unassessed)
Genus Ataxellus Dall, 1912 (uncertain, unassessed)
Genus Ataxus Albers, 1850 (uncertain, unassessed)
Genus Ateriana Locard, 1889 (uncertain, unassessed)
Genus Athlenia Bartsch, 1946 (uncertain, unassessed)
Genus Athletoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Athlodactylites Buckman, 1927 † (uncertain, unassessed)
Genus Atlantica Wagner, 1897 (uncertain, unassessed)
Genus Atlantidea Pilsbry, 1922 (uncertain, unassessed)
Genus Atlantis Anon., 1819 (uncertain, unassessed)
Genus Atlantolimax Dall, 1916 (uncertain, unassessed)
Genus Atlas Lesueur, 1817 (uncertain, unassessed)
Genus Atollites Zuber, 1910 † (uncertain, unassessed)
Genus Atopa Albers, 1850 (uncertain, unassessed)
Genus Atoyac Baker, 1928 (uncertain, unassessed)
Genus Atracta Scudder, 1882 (uncertain, unassessed)
Genus Atractilites Link, 1807 (uncertain, unassessed)
Genus Atractoconcha Gistel, 1868 (uncertain, unassessed)
Genus Atractophaedusa Ehrmann, 1927 (uncertain, unassessed)
Genus Atractostoma Sayn, 1932 † (uncertain, unassessed)
Genus Atractus Agassiz in Sowerby, 1839 (uncertain, unassessed)
Genus Atramentarius Buckland, 1836 † (uncertain, unassessed)
Genus Atrichoconcha Bartsch, 1942 (uncertain, unassessed)
Genus Atrocyclus Iredale, 1941 (uncertain, unassessed)
Genus Attica Böttger, 1877 † (uncertain, unassessed)
Genus Augustula Thiele, 1931 (uncertain, unassessed)
Genus Aulaca Westerlund, 1902 (uncertain, unassessed)
Genus Aulachalia Sacco, 1893 (uncertain, unassessed)
Genus Aulacobelus Pavlov, 1913 (uncertain, unassessed)
Genus Aulacoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Aulacomerella von Huene, 1900 (uncertain, unassessed)
Genus Aulacoplerum Philippi, 1899 (uncertain, unassessed)
Genus Aulacopoma Möllendorff, 1897 (uncertain, unassessed)
Genus Aulacopus Pfeffer, 1878 (uncertain, unassessed)
Genus Aulacostephanoides Schindewolf, 1925 (uncertain, unassessed)
Genus Aulacoteuthis Lissajous, 1915 (uncertain, unassessed)
Genus Aulacotrochus Cossmann, 1916 † (uncertain, unassessed)
Genus Aulapeltoceras Schindewolf, 1925 (uncertain, unassessed)
Genus Aulichnites Fenton & Fenton, 1937 (uncertain, unassessed)
Genus Auloceras Trautschold, 1866 (uncertain, unassessed)
Genus Aulopea Dunbar, 1920 † (uncertain, unassessed)
Genus Auriculites Herrmannsen, 1845 (uncertain, unassessed)
Genus Aurigerus Hyatt in Eastman-Zittel, 1900 † (uncertain, unassessed)
Genus Auritesta Pilsbry, 1929 (uncertain, unassessed)
Genus Ausseites Flower, 1944 † (uncertain, unassessed)
Genus Austenia Gude, 1897 (uncertain, unassessed)
Genus Australiella Collignon, 1948 † (uncertain, unassessed)
Genus Austrobalea Pilsbry, 1924 (uncertain, unassessed)
Genus Austrocyclus Ancey, 1898 (uncertain, unassessed)
Genus Austropilula Thiele, 1927 (uncertain, unassessed)
Genus Austrosphenodiscus Olsson, 1944 † (uncertain, unassessed)
Genus Autodetus Lindström, 1884 (uncertain, unassessed)
Genus Avakubia Pilsbry, 1919 (uncertain, unassessed)
Genus Avaoceras Ulrich, Foerste, Miller & Unklesbay, 1944 † (uncertain, unassessed)
Genus Avardaria Andrussov, 1923 † (uncertain, unassessed)
Genus Avarua Baker, 1938 (uncertain, unassessed)
Genus Avellanopsis Roman, 1921 † (uncertain, unassessed)
Genus Avenaceana Fagot, 1891 (uncertain, unassessed)
Genus Avenionensiana Caziot, 1910 (uncertain, unassessed)
Genus Aversa Hübner, 1810 (uncertain, unassessed)
Genus Aviculina d'Orbigny in Dubois de Montpéreux, 1843 † (uncertain, unassessed)
Genus Aviculoperna Pcelincev, 1931 † (uncertain, unassessed)
Genus Avoniana Bourguignat, 1881 (uncertain, unassessed)
Genus Axinaeoderma Poli, 1795 (uncertain, unassessed)
Genus Azecastrum Bourguignat, 1858 (uncertain, unassessed)
Genus Azemus Rang, 1829 (uncertain, unassessed)
Genus Baboria Cossmann, 1898 † (uncertain, unassessed)
Genus Bactrocoptis Pilsbry in Tryon & Pilsbry, 1903 (uncertain, unassessed)
Genus Baculatoceras Mascke, 1906 (uncertain, unassessed)
Genus Bagenoviella Aksarina, 1968 † (uncertain, unassessed)
Genus Bahiensis Jousseaume, 1877 (uncertain, unassessed)
Genus Baicalineopsis Dybowski & Grochmalicki, 1913 (uncertain, unassessed)
Genus Baicalocochlea Lindholm, 1927 (uncertain, unassessed)
Genus Baikalia Crosse & Fischer, 1879 (uncertain, unassessed)
Genus Baikaliella Lindholm, 1909 (uncertain, unassessed)
Genus Baizea Bourguignat, 1885 (uncertain, unassessed)
Genus Bajocisphinctes Buckman, 1927 † (uncertain, unassessed)
Genus Balaea Leach in Turton, 1831 (uncertain, unassessed)
Genus Baldwinia Ancey, 1899 (uncertain, unassessed)
Genus Baleastra Pfeiffer, 1856 (uncertain, unassessed)
Genus Baleoclausilia Bielz, 1863 (uncertain, unassessed)
Genus Baleomitra Finlay, 1926 (uncertain, unassessed)
Genus Balfouria Crosse, 1884 (uncertain, unassessed)
Genus Balioceratites Schrammen, 1934 † (uncertain, unassessed)
Genus Baltia Dohm, 1925 † (uncertain, unassessed)
Genus Balvites Wedekind, 1914 (uncertain, unassessed)
Genus Bambanagites Mojsisovics, 1897 † (uncertain, unassessed)
Genus Bambasoceras Li in Lu & Lin, 1984 † (uncertain, unassessed)
Genus Banatica Böttger, 1877 † (uncertain, unassessed)
Genus Banatoconcha Wagner, 1941 (uncertain, unassessed)
Genus Banneina Stache, 1889 † (uncertain, unassessed)
Genus Bapuia Godwin-Austen, 1918 (uncertain, unassessed)
Genus Barassia Jekelius, 1933 † (uncertain, unassessed)
Genus Barbala Gray, 1825 (uncertain, unassessed)
Genus Barbula Deshayes, 1830 (uncertain, unassessed)
Genus Barcinensiana Fagot, 1884 (uncertain, unassessed)
Genus Baroda Stoliczka, 1870 † (uncertain, unassessed)
Genus Barrella Hedström, 1930 (uncertain, unassessed)
Genus Bartschivindex Baker, 1943 (uncertain, unassessed)
Genus Baryana Locard, 1889 (uncertain, unassessed)
Genus Bashkirites Librovitch, 1947 † (uncertain, unassessed)
Genus Basidentata Dybowski & Grochmalicki, 1923 (uncertain, unassessed)
Genus Basleonautilus Ruzhentzev & Shimanskii, 1954 † (uncertain, unassessed)
Genus Bassaniceras Fucini, 1929 † (uncertain, unassessed)
Genus Bastorotia Jousseaume, 1884 (uncertain, unassessed)
Genus Batavusiana Locard, 1889 (uncertain, unassessed)
Genus Bathmoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Bathmopterus Kirk, 1928 † (uncertain, unassessed)
Genus Bathonella Yen, 1948 † (uncertain, unassessed)
Genus Bathyacria Agassiz (uncertain, unassessed)
Genus Bathyamussium Oyama in Kuroda, 1951 (uncertain, unassessed)
Genus Bathyclista Böttger, 1885 (uncertain, unassessed)
Genus Bathyspira Aguayo & Borro, 1946 † (uncertain, unassessed)
Genus Battistiana Pallary, 1920 (uncertain, unassessed)
Genus Baudonia Binney, 1885 (uncertain, unassessed)
Genus Baudonia Mabille, 1868 (uncertain, unassessed)
Genus Beaumieriana Pallary, 1926 (uncertain, unassessed)
Genus Beccariana Locard, 1890 (uncertain, unassessed)
Genus Beddomea Nevill, 1878 (uncertain, unassessed)
Genus Behemoth Buckman, 1922 † (uncertain, unassessed)
Genus Beilania Preston, 1913 (uncertain, unassessed)
Genus Belemnita Rafinesque, 1815 (uncertain, unassessed)
Genus Belemnita Fleming, 1828 (uncertain, unassessed)
Genus Belemnitea Herrmannsen, 1846 (uncertain, unassessed)
Genus Belemnoconus Naef, 1922 † (uncertain, unassessed)
Genus Belemnon Gabb, 1861 (uncertain, unassessed)
Genus Belemnopsis Bayle, 1878 † (uncertain, unassessed)
Genus Belemnosepia Buckland, 1835 † (uncertain, unassessed)
Genus Belemnosis Edwards, 1849 † (uncertain, unassessed)
Genus Bellacepolis Baker, 1943 (uncertain, unassessed)
Genus Bellerophorina Gray, 1847 (uncertain, unassessed)
Genus Bellerophus de Blainville, 1825 (uncertain, unassessed)
Genus Bellrhagada Iredale, 1938 (uncertain, unassessed)
Genus Bellula Wagner, 1907 (uncertain, unassessed)
Genus Belocaulus Hoffmann, 1925 (uncertain, unassessed)
Genus Beloceramus Heinz, 1932 † (uncertain, unassessed)
Genus Belonarion Pilsbry, 1919 (uncertain, unassessed)
Genus Belonesia Baker, 1938 (uncertain, unassessed)
Genus Belonis Hartmann, 1840 (uncertain, unassessed)
Genus Belopeltis Voltz, 1840 † (uncertain, unassessed)
Genus Belopterella Naef, 1921 (uncertain, unassessed)
Genus Beloteuthis Münster, 1843 (uncertain, unassessed)
Genus Belusiana Bourguignat, 1884 (uncertain, unassessed)
Genus Bembix de Koninck, 1844 (uncertain, unassessed)
Genus Benedictites Buckman, 1924 † (uncertain, unassessed)
Genus Berenguieriana Locard, 1889 (uncertain, unassessed)
Genus Bererella Collignon, 1948 † (uncertain, unassessed)
Genus Bernayia Cossmann, 1887 (uncertain, unassessed)
Genus Bernicia Cox, 1927 † (uncertain, unassessed)
Genus Berpolis Leach in de Blainville, 1825 (uncertain, unassessed)
Genus Berriasibelus Delattre, 1952 † (uncertain, unassessed)
Genus Berryidium Grimpe, 1931 (uncertain, unassessed)
Genus Besairieia Heinz, 1932 † (uncertain, unassessed)
Genus Besselsoceras Shimizu & Obata, 1935 † (uncertain, unassessed)
Genus Beushausenella Dahmer, 1936 † (uncertain, unassessed)
Genus Beushausenia Mailleux, 1913 † (uncertain, unassessed)
Genus Biamora Iredale, 1941 (uncertain, unassessed)
Genus Biangulatus Dybowski & Grochmalicki, 1925 (uncertain, unassessed)
Genus Biangulaxis Pilsbry in Tryon & Pilsbry, 1907 (uncertain, unassessed)
Genus Biapholus Leach, 1847 (uncertain, unassessed)
Genus Biasaloceras Drushchitz, 1953 † (uncertain, unassessed)
Genus Biauris Cossmann, 1921 † (uncertain, unassessed)
Genus Bicarinatiana Fagot, 1892 (uncertain, unassessed)
Genus Biconia Swainson, 1840 (uncertain, unassessed)
Genus Bicorium Meyer, 1880 (uncertain, unassessed)
Genus Bicornia May, 1929 (uncertain, unassessed)
Genus Bicornucaprina Hofmann, 1912 (uncertain, unassessed)
Genus Bicuerda Kues & Batten, 2001 † (uncertain, unassessed)
Genus Bidensiana Fagot, 1891 (uncertain, unassessed)
Genus Bigibbosa Böttger, 1878 (uncertain, unassessed)
Genus Bihippurites Futterer, 1896 † (uncertain, unassessed)
Genus Bikosmoceras Buckman, 1926 † (uncertain, unassessed)
Genus Biligulitheca Qian, Xie & He, 2001 † (uncertain, unassessed)
Genus Bilinassa Jousseaume, 1894 † (uncertain, unassessed)
Genus Bilobaria Pelseneer, 1911 (uncertain, unassessed)
Genus Bineurus Simpson, 1900 (uncertain, unassessed)
Genus Binghami Brown, 1827 (uncertain, unassessed)
Genus Binodata Böttger, 1877 † (uncertain, unassessed)
Genus Binvoluta Schlüter, 1838 (uncertain, unassessed)
Genus Biplicatiana Caziot, 1910 (uncertain, unassessed)
Genus Birostrum Desmoulins, 1827 (uncertain, unassessed)
Genus Bisiphytes Montfort, 1808 (uncertain, unassessed)
Genus Bitomus de Montfort, 1810 (uncertain, unassessed)
Genus Bitorquata Böttger, 1877 † (uncertain, unassessed)
Genus Bittnerella Dall, 1898 † (uncertain, unassessed)
Genus Bittnerites Kittl, 1903 † (uncertain, unassessed)
Genus Bitubulites Blumenbach, 1803 (uncertain, unassessed)
Genus Bivoniopsis Sacco in Bellardi & Sacco, 1896 (uncertain, unassessed)
Genus Blainvilla Chiaje, 1829 (uncertain, unassessed)
Genus Blanckenhornia Teppner, 1922 † (uncertain, unassessed)
Genus Blandia Chitty, 1857 (uncertain, unassessed)
Genus Blanfordia Uhlig, 1905 † (uncertain, unassessed)
Genus Blanfordiceras Cossmann, 1907 † (uncertain, unassessed)
Genus Blanfordiceras Spath, 1924 † (uncertain, unassessed)
Genus Blauneriana Caziot, 1910 (uncertain, unassessed)
Genus Blephalum Rafinesque, 1814 (uncertain, unassessed)
Genus Bloyetia Bourguignat, 1889 (uncertain, unassessed)
Genus Bodmania Miller & Faber, 1894 (uncertain, unassessed)
Genus Boehmiceramus Heinz, 1932 † (uncertain, unassessed)
Genus Boehmiceras Grigorieva, 1938 † (uncertain, unassessed)
Genus Boettgerova Frankenberger, 1910 (uncertain, unassessed)
Genus Bogdoites Kittl, 1903 † (uncertain, unassessed)
Genus Bojozyga Horný, 1954 † (uncertain, unassessed)
Genus Bolboceras Fischer de Waldheim, 1844 (uncertain, unassessed)
Genus Bolbotina Herrmannsen, 1846 (uncertain, unassessed)
Genus Bolenensiana Fagot, 1883 (uncertain, unassessed)
Genus Bollenensiana Caziot, 1910 (uncertain, unassessed)
Genus Bollenentiana Caziot, 1910 (uncertain, unassessed)
Genus Bolteniana Bourguignat, 1889 (uncertain, unassessed)
Genus Bonairea Baker, 1924 (uncertain, unassessed)
Genus Boncavailia Roman & Mazeran, 1920 (uncertain, unassessed)
Genus Bonnanius Jousseaume, 1900 (uncertain, unassessed)
Genus Bontia Gray, 1847 (uncertain, unassessed)
Genus Boridium Bergh in Semper, 1908 (uncertain, unassessed)
Genus Boriquena Baker, 1941 (uncertain, unassessed)
Genus Bosempra Brown, 1844 (uncertain, unassessed)
Genus Boskoviacia Brusina, 1884 † (uncertain, unassessed)
Genus Bosnica Westerlund, 1884 (uncertain, unassessed)
Genus Bosphoricardium Eberzin, 1947 † (uncertain, unassessed)
Genus Bothropoma Wagner, 1908 (uncertain, unassessed)
Genus Botteria Brusina, 1904 (uncertain, unassessed)
Genus Bouireria Kobelt, 1897 (uncertain, unassessed)
Genus Bouregregia Alberti, 2000 † (uncertain, unassessed)
Genus Bourguignatia Giraud, 1885 (uncertain, unassessed)
Genus Bovillina Dall, 1924 (uncertain, unassessed)
Genus Boyssiana Fagot, 1891 (uncertain, unassessed)
Genus Brachelixella Sacco, 1890 (uncertain, unassessed)
Genus Brachyomphalus Dollfus, 1916 † (uncertain, unassessed)
Genus Brachypyrgula Polinski, 1929 (uncertain, unassessed)
Genus Brachypyrgulina Haas, 1955 (uncertain, unassessed)
Genus Brachyspira Pfeiffer, 1855 (uncertain, unassessed)
Genus Brachystoma Gardner, 1876 † (uncertain, unassessed)
Genus Brachytrema Cossmann, 1889 (uncertain, unassessed)
Genus Bradicardia Loriol, 1891 † (uncertain, unassessed)
Genus Brancoceras Hyatt, 1884 (uncertain, unassessed)
Genus Branerillus Kobelt, 1913 (uncertain, unassessed)
Genus Brannerillus Hannibal, 1912 † (uncertain, unassessed)
Genus Brasilina Buckman, 1899 † (uncertain, unassessed)
Genus Brasilotethys Ihering, 1915 (uncertain, unassessed)
Genus Braunsina Buckman, 1902 † (uncertain, unassessed)
Genus Brazaturia Stenzel, 1935 † (uncertain, unassessed)
Genus Brazierella Baker, 1941 (uncertain, unassessed)
Genus Brazzaea Bourguignat, 1885 (uncertain, unassessed)
Genus Brebissoniana Locard, 1889 (uncertain, unassessed)
Genus Brephulus Westerlund, 1898 (uncertain, unassessed)
Genus Brephulus Beck, 1837 (uncertain, unassessed)
Genus Brevipedella Pilsbry in Tryon & Pilsbry, 1903 (uncertain, unassessed)
Genus Brevisiana Fagot, 1892 (uncertain, unassessed)
Genus Breynioceras Foerste, 1929 (uncertain, unassessed)
Genus Bria de Boury, 1891 (uncertain, unassessed)
Genus Briandiana Bourguignat, 1881 (uncertain, unassessed)
Genus Briardia Munier-Chalmas, 1884 (uncertain, unassessed)
Genus Briareites Buckman, 1921 † (uncertain, unassessed)
Genus Brifa Gregorio, 1930 † (uncertain, unassessed)
Genus Brittsoceras Miller, 1949 † (uncertain, unassessed)
Genus Brocchites Finlay, 1926 (uncertain, unassessed)
Genus Broeckia Koninck, 1885 (uncertain, unassessed)
Genus Brongus Gregorio, 1885 † (uncertain, unassessed)
Genus Brotiana Bourguignat, 1881 (uncertain, unassessed)
Genus Brownia Adams, 1858 (uncertain, unassessed)
Genus Brownia d'Orbigny in Sagra, 1841 (uncertain, unassessed)
Genus Brusinaela Andrussov, 1912 (uncertain, unassessed)
Genus Bucardites Gmelin, 1793 (uncertain, unassessed)
Genus Bucardium Herrmannsen, 1846 (uncertain, unassessed)
Genus Buccardites Schlotheim, 1813 (uncertain, unassessed)
Genus Buccimitra Harris, 1895 † (uncertain, unassessed)
Genus Buccina Deshayes, 1830 (uncertain, unassessed)
Genus Buccinarius Duméril, 1806 (uncertain, unassessed)
Genus Buccinatrix Cragin, 1893 † (uncertain, unassessed)
Genus Buccinocochlea Herrmannsen, 1846 (uncertain, unassessed)
Genus Buccinoidiana Bourguignat, 1884 (uncertain, unassessed)
Genus Buccinopsis Mayer, 1876 † (uncertain, unassessed)
Genus Buccinopsis Deshayes, 1865 (uncertain, unassessed)
Genus Buccinula Hübner, 1810 (uncertain, unassessed)
Genus Buccinus Gray, 1847 (uncertain, unassessed)
Genus Buccodus Deshayes, 1839 (uncertain, unassessed)
Genus Buchites Mojsisovics, 1893 † (uncertain, unassessed)
Genus Buckmaniceras Crickmay, 1930 † (uncertain, unassessed)
Genus Budmania Brusina, 1897 (uncertain, unassessed)
Genus Buettnerella Simroth in Voeltzkow, 1910 (uncertain, unassessed)
Genus Buettneria Simroth, 1888 (uncertain, unassessed)
Genus Bugesia Paladilhe, 1866 (uncertain, unassessed)
Genus Bulbus Smith, 1839 (uncertain, unassessed)
Genus Bulimella Hall, 1858 (uncertain, unassessed)
Genus Bulimella Pfeiffer, 1854 (uncertain, unassessed)
Genus Buliminidius Heude, 1890 (uncertain, unassessed)
Genus Bulimopsis Bowdich, 1822 (uncertain, unassessed)
Genus Bulimulus Risso, 1826 (uncertain, unassessed)
Genus Bulina Lesson, 1833 (uncertain, unassessed)
Genus Bulinies Caziot, 1903 (uncertain, unassessed)
Genus Bulinus Studer, 1820 (uncertain, unassessed)
Genus Bulinus Férussac, 1822 (uncertain, unassessed)
Genus Bulla Müller, 1776 (uncertain, unassessed)
Genus Bulla Bruguière, 1789 (uncertain, unassessed)
Genus Bullacites Schlotheim, 1820 (uncertain, unassessed)
Genus Bullaea Brown, 1827 (uncertain, unassessed)
Genus Bullea de Blainville, 1825 (uncertain, unassessed)
Genus Bullearius Duméril, 1806 (uncertain, unassessed)
Genus Bullidium Meckel in Leue, 1813 (uncertain, unassessed)
Genus Bullinia Rafinesque, 1815 (uncertain, unassessed)
Genus Bullinus Fabricius, 1823 (uncertain, unassessed)
Genus Bullites Schlotheim, 1813 (uncertain, unassessed)
Genus Bulloideus Simpson, 1900 (uncertain, unassessed)
Genus Bulnaria Mittre, 1850 (uncertain, unassessed)
Genus Bunyerichnus Glaessner, 1969 † (uncertain, unassessed)
Genus Burgensteinia Bourguignat, 1880 † (uncertain, unassessed)
Genus Burmochloritis Godwin-Austen, 1920 (uncertain, unassessed)
Genus Burtonilla Smith, 1904 (uncertain, unassessed)
Genus Burtopsis Bourguignat, 1889 (uncertain, unassessed)
Genus Byssomia Fleming, 1822 (uncertain, unassessed)
Genus Byssomya Goldfuss, 1820 (uncertain, unassessed)
Genus Bythoceras Moore, 1898 (uncertain, unassessed)
Genus Caecalium Fleming, 1822 (uncertain, unassessed)
Genus Caecilianopsis Pilsbry, 1907 (uncertain, unassessed)
Genus Caecum Morris, 1843 † (uncertain, unassessed)
Genus Caecum Wood, 1848 † (uncertain, unassessed)
Genus Caesarella Pfeffer, 1929 † (uncertain, unassessed)
Genus Caillaudiana Bourguignat, 1880 (uncertain, unassessed)
Genus Caladacna Andrusov, 1917 † (uncertain, unassessed)
Genus Calamara Gray, 1821 (uncertain, unassessed)
Genus Calcar Schumacher, 1817 (uncertain, unassessed)
Genus Calcaraea Récluz, 1868 (uncertain, unassessed)
Genus Calceolaria Griffith & Pidgeon in Cuvier, 1834 (uncertain, unassessed)
Genus Calerus Diener, 1926 † (uncertain, unassessed)
Genus Caliagaleodea Clark, 1942 † (uncertain, unassessed)
Genus Calidivitrina Pilsbry, 1919 (uncertain, unassessed)
Genus Californites Hyatt & Smith, 1905 † (uncertain, unassessed)
Genus Calipeopsis Broderip, 1835 (uncertain, unassessed)
Genus Calipyrgula Pilsbry, 1934 † (uncertain, unassessed)
Genus Calliarca Conrad, 1866 (uncertain, unassessed)
Genus Callicardia Conrad in Kerr, 1875 † (uncertain, unassessed)
Genus Callina Hannibal, 1912 (uncertain, unassessed)
Genus Callinina Thiele, 1931 (uncertain, unassessed)
Genus Calliopsis Wenz, 1923 (uncertain, unassessed)
Genus Calliostomaphotinula Strebel, 1908 (uncertain, unassessed)
Genus Callirhoe Montfort, 1808 (uncertain, unassessed)
Genus Calliscapha Swainson, 1840 (uncertain, unassessed)
Genus Callistoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Callistochitontypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Callistoderma Poli, 1795 (uncertain, unassessed)
Genus Callitricoderma Poli, 1795 (uncertain, unassessed)
Genus Callochitontypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Callonema Conrad in Kerr, 1875 † (uncertain, unassessed)
Genus Callopleura Pallary, 1939 (uncertain, unassessed)
Genus Caloceratites Schrammen, 1928 † (uncertain, unassessed)
Genus Calodiona Stefanescu, 1896 † (uncertain, unassessed)
Genus Calogoniodiscus Pfeffer, 1929 † (uncertain, unassessed)
Genus Caloplisma Crosse & Fischer, 1893 (uncertain, unassessed)
Genus Calvertia Bourguignat, 1880 † (uncertain, unassessed)
Genus Calypeopsis Lesson, 1830 † (uncertain, unassessed)
Genus Calyptra Gray, 1847 (uncertain, unassessed)
Genus Calyptracites Krueger, 1823 (uncertain, unassessed)
Genus Calytra Westerlund, 1885 (uncertain, unassessed)
Genus Camaenopsis Dollfus & Dautzenberg, 1924 (uncertain, unassessed)
Genus Cambieria Bourguignat, 1885 (uncertain, unassessed)
Genus Cameronia Bourguignat, 1879 (uncertain, unassessed)
Genus Camillus Montfort, 1810 (uncertain, unassessed)
Genus Caminata Fabricius, 1823 (uncertain, unassessed)
Genus Camostraea Deshayes, 1830 (uncertain, unassessed)
Genus Campilocerates Fortis, 1778 (uncertain, unassessed)
Genus Camponella Bandel, 1995 † (uncertain, unassessed)
Genus Camptoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Campulites Deshayes in Lamarck, 1845 (uncertain, unassessed)
Genus Campylaea Ihering, 1892 (uncertain, unassessed)
Genus Campylaxis Ancey, 1888 (uncertain, unassessed)
Genus Campylocathaica Andreae, 1900 (uncertain, unassessed)
Genus Campyloceratites Schrammen, 1928 † (uncertain, unassessed)
Genus Campylonaus Benson, 1835 (uncertain, unassessed)
Genus Campylosepia Picard, 1899 † (uncertain, unassessed)
Genus Campylostylus Sandberger, 1871 † (uncertain, unassessed)
Genus Camuriana Locard, 1890 (uncertain, unassessed)
Genus Canalicia Böttger, 1863 † (uncertain, unassessed)
Genus Canaliculites Jeannet, 1951 † (uncertain, unassessed)
Genus Cancrites Herrmannsen, 1846 (uncertain, unassessed)
Genus Candela Herrmannsen, 1846 (uncertain, unassessed)
Genus Candellista Iredale & O'Donoghue, 1923 (uncertain, unassessed)
Genus Candidana Caziot, 1910 (uncertain, unassessed)
Genus Candidissima Pallary, 1910 (uncertain, unassessed)
Genus Canistrum Mörch, 1852 (uncertain, unassessed)
Genus Canopus Rafinesque, 1840 (uncertain, unassessed)
Genus Cantabricana Fagot, 1891 (uncertain, unassessed)
Genus Cantantostoma Sandberger, 1842 (uncertain, unassessed)
Genus Canthapleura Guilding in Swainson, 1840 (uncertain, unassessed)
Genus Canthidomus Swainson, 1840 † (uncertain, unassessed)
Genus Capeloites Lisson, 1937 † (uncertain, unassessed)
Genus Capillifera Honigmann, 1906 (uncertain, unassessed)
Genus Capisteria Gray, 1847 (uncertain, unassessed)
Genus Capitina Watson, 1934 (uncertain, unassessed)
Genus Caprinus Montfort, 1810 (uncertain, unassessed)
Genus Capsella Deshayes, 1855 (uncertain, unassessed)
Genus Capulella Dall, 1924 (uncertain, unassessed)
Genus Caracolla Albers, 1850 (uncertain, unassessed)
Genus Carascalensiana Fagot, 1885 (uncertain, unassessed)
Genus Carassa Gistl, 1848 (uncertain, unassessed)
Genus Carcellesia Farfante, 1952 (uncertain, unassessed)
Genus Cardea Whitfield, 1885 † (uncertain, unassessed)
Genus Cardiapus d'Orbigny, 1842 † (uncertain, unassessed)
Genus Cardiarius Duméril, 1806 (uncertain, unassessed)
Genus Cardinia Geinitz, 1846 (uncertain, unassessed)
Genus Cardiodonta Laube, 1867 (uncertain, unassessed)
Genus Cardiolithus Herrmannsen, 1846 (uncertain, unassessed)
Genus Cardiophora d'Orbigny, 1839 (uncertain, unassessed)
Genus Cardiopsis Meek & Worthen, 1861 (uncertain, unassessed)
Genus Cardiostoma Sandberger, 1872 (uncertain, unassessed)
Genus Cardites Dalman, 1825 (uncertain, unassessed)
Genus Carenrostrina Gregorio, 1894 † (uncertain, unassessed)
Genus Caricella Gardner, 1947 † (uncertain, unassessed)
Genus Carinairoida Souleyet, 1852 (uncertain, unassessed)
Genus Carinatiana Fagot, 1891 (uncertain, unassessed)
Genus Carinella Mabille, 1870 (uncertain, unassessed)
Genus Carinella Sowerby, 1839 (uncertain, unassessed)
Genus Carinia Loerenthey, 1906 † (uncertain, unassessed)
Genus Carinifera Carpenter, 1864 (uncertain, unassessed)
Genus Carinolacuna Thiele, 1929 (uncertain, unassessed)
Genus Cariosiana Bourguignat, 1876 (uncertain, unassessed)
Genus Carixiceras Spath, 1925 † (uncertain, unassessed)
Genus Carmerope Iredale, 1941 (uncertain, unassessed)
Genus Carneola Westerlund, 1873 (uncertain, unassessed)
Genus Carniolites Arthaber, 1911 † (uncertain, unassessed)
Genus Carocolla Broderip, 1832 (uncertain, unassessed)
Genus Carocolla Gistl, 1848 (uncertain, unassessed)
Genus Carocolla Lamarck, 1822 (uncertain, unassessed)
Genus Caroletitia Iredale, 1941 (uncertain, unassessed)
Genus Carolinella Pilsbry in Tryon & Pilsbry, 1909 (uncertain, unassessed)
Genus Carpenteria Deslongchamps, 1860 (uncertain, unassessed)
Genus Carthusiana Kobelt, 1871 (uncertain, unassessed)
Genus Carthusianana Caziot, 1908 (uncertain, unassessed)
Genus Cartissa Herrmannsen, 1846 (uncertain, unassessed)
Genus Carvalhoiana Locard, 1890 (uncertain, unassessed)
Genus Carychiopsis Martens, 1895 (uncertain, unassessed)
Genus Carychiopsis Sandberger, 1872 (uncertain, unassessed)
Genus Casertiana Fagot, 1892 (uncertain, unassessed)
Genus Caspicardium Astafyeva, 1955 † (uncertain, unassessed)
Genus Caspilimax Hesse, 1926 (uncertain, unassessed)
Genus Casserium Chiaje, 1844 (uncertain, unassessed)
Genus Cassida Brünnich, 1772 (uncertain, unassessed)
Genus Cassidea Swainson, 1835 (uncertain, unassessed)
Genus Cassidites Krueger, 1823 (uncertain, unassessed)
Genus Cassidulus Berthold in Latreille, 1827 (uncertain, unassessed)
Genus Cassidulus Beck, 1838 (uncertain, unassessed)
Genus Cassis Lamarck, 1799 (uncertain, unassessed)
Genus Cassisoma Rovereto, 1899 (uncertain, unassessed)
Genus Casta Albers, 1850 (uncertain, unassessed)
Genus Castalioides Marshall, 1934 (uncertain, unassessed)
Genus Castellotrachia Iredale, 1933 (uncertain, unassessed)
Genus Castellum Meyer, 1887 (uncertain, unassessed)
Genus Casteria Tucker & Wilson, 1933 † (uncertain, unassessed)
Genus Castoroiloceras Bean, 1927 (uncertain, unassessed)
Genus Castroiana Caziot, 1910 (uncertain, unassessed)
Genus Catacephalites Buckman, 1922 † (uncertain, unassessed)
Genus Catachysium Link, 1830 (uncertain, unassessed)
Genus Catillina Gray, 1868 (uncertain, unassessed)
Genus Catilloides Andrussov, 1923 † (uncertain, unassessed)
Genus Catillus Brongniart in Cuvier & Brongniart, 1822 † (uncertain, unassessed)
Genus Catinella Stache, 1877 † (uncertain, unassessed)
Genus Catinus Fabricius, 1823 (uncertain, unassessed)
Genus Catinus Adams, 1853 (uncertain, unassessed)
Genus Catozone Perner in Barrande, 1907 † (uncertain, unassessed)
Genus Catubrinia Caneva, 1906 † (uncertain, unassessed)
Genus Caucasica Böttger, 1877 † (uncertain, unassessed)
Genus Caucasicana Fagot, 1891 (uncertain, unassessed)
Genus Caucasicola Hesse, 1917 (uncertain, unassessed)
Genus Caucasipupa Pilsbry, 1926 (uncertain, unassessed)
Genus Caucasofixus Lindholm, 1927 (uncertain, unassessed)
Genus Caudiculatus Simpson, 1900 (uncertain, unassessed)
Genus Cauliculus Lindholm, 1925 (uncertain, unassessed)
Genus Cavoscala Whitfield, 1892 † (uncertain, unassessed)
Genus Cawtoniceras Buckman, 1923 † (uncertain, unassessed)
Genus Cearella Ihering, 1906 (uncertain, unassessed)
Genus Cechenoceras van Hoepen, 1941 † (uncertain, unassessed)
Genus Ceiba Clark & Durham, 1946 † (uncertain, unassessed)
Genus Celaenoteuthis Naef, 1922 † (uncertain, unassessed)
Genus Celato Gioeni, 1783 (uncertain, unassessed)
Genus Cemeneleana Caziot, 1908 (uncertain, unassessed)
Genus Ceneona Gistl, 1848 (uncertain, unassessed)
Genus Cenomanites Haug, 1898 † (uncertain, unassessed)
Genus Cenospira Finlay, 1924 (uncertain, unassessed)
Genus Centrotheca Salter, 1866 † (uncertain, unassessed)
Genus Cepacella Stache, 1880 † (uncertain, unassessed)
Genus Cephaloceramus Heinz, 1932 † (uncertain, unassessed)
Genus Ceramites Herrmannsen, 1846 (uncertain, unassessed)
Genus Cerastes Poli, 1791 (uncertain, unassessed)
Genus Cerataconcha Cockerell, 1930 (uncertain, unassessed)
Genus Ceratoides Agassiz, 1845 (uncertain, unassessed)
Genus Ceratoides Herrmannsen, 1846 (uncertain, unassessed)
Genus Ceratosiphon Gill, 1870 (uncertain, unassessed)
Genus Ceratotuberculus Imlay, 1938 † (uncertain, unassessed)
Genus Ceraunites Herrmannsen, 1846 (uncertain, unassessed)
Genus Cercimelania Fischer & Crosse, 1892 (uncertain, unassessed)
Genus Cercomyopsis Sandberger, 1887 † (uncertain, unassessed)
Genus Cercomyopsis Meek, 1871 (uncertain, unassessed)
Genus Cerealis Paetel, 1875 (uncertain, unassessed)
Genus Cerericeras Buckman, 1922 † (uncertain, unassessed)
Genus Cerethiopsis Anon., 1868 (uncertain, unassessed)
Genus Cerigana Böttger, 1878 (uncertain, unassessed)
Genus Cerites De Lamétherie, 1807 (uncertain, unassessed)
Genus Cerithidella Stache, 1889 † (uncertain, unassessed)
Genus Cerithites Krueger, 1823 (uncertain, unassessed)
Genus Cerophora d'Orbigny, 1836 (uncertain, unassessed)
Genus Cerycium Philippi, 1841 (uncertain, unassessed)
Genus Cespitana Caziot, 1908 (uncertain, unassessed)
Genus Cetocis Montfort, 1808 (uncertain, unassessed)
Genus Chaenodomus Ulrich, 1893 † (uncertain, unassessed)
Genus Chaetopleuratypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Chaetopoda Blainville (uncertain, unassessed)
Genus Chalcedoniceras Buckman, 1922 † (uncertain, unassessed)
Genus Chalcocystis Watson, 1934 (uncertain, unassessed)
Genus Chalicopoma Möllendorff, 1894 (uncertain, unassessed)
Genus Chamaeformis Herrmannsen, 1852 (uncertain, unassessed)
Genus Chamaepholas Herrmannsen, 1846 (uncertain, unassessed)
Genus Chambardia Servain, 1890 (uncertain, unassessed)
Genus Chambardiana Bourguignat, 1880 (uncertain, unassessed)
Genus Chamepholas Herrmannsen, 1846 (uncertain, unassessed)
Genus Chamostraea Roissy, 1805 (uncertain, unassessed)
Genus Chamostraea Herrmannsen, 1846 (uncertain, unassessed)
Genus Chancelia Hagenmüller, 1885 (uncertain, unassessed)
Genus Chandomirovia Sazonov, 1951 † (uncertain, unassessed)
Genus Characebia Stache, 1889 † (uncertain, unassessed)
Genus Charadrobia Albers, 1854 (uncertain, unassessed)
Genus Charax Benson, 1859 (uncertain, unassessed)
Genus Charis Albers, 1850 (uncertain, unassessed)
Genus Charlestonoceras Anon., 1927 (uncertain, unassessed)
Genus Charmasseiceras Spath, 1924 † (uncertain, unassessed)
Genus Charodotes Pilsbry, 1939 (uncertain, unassessed)
Genus Charonia Mabille, 1886 (uncertain, unassessed)
Genus Charpentieriana Bourguignat, 1884 (uncertain, unassessed)
Genus Charruia Rusconi, 1955 † (uncertain, unassessed)
Genus Charta Gray, 1847 (uncertain, unassessed)
Genus Chartoconcha Andrussov, 1907 † (uncertain, unassessed)
Genus Chartronia Buckman, 1898 † (uncertain, unassessed)
Genus Charybditeuthis Vivanti, 1912 (uncertain, unassessed)
Genus Charydrobia Stache, 1889 † (uncertain, unassessed)
Genus Chatharella Clessin, ? 1892 (uncertain, unassessed)
Genus Chelidonopsis Ancey, 1887 (uncertain, unassessed)
Genus Chelidonura Rochebrune, 1886 (uncertain, unassessed)
Genus Chemnitzia Conrad, 1860 (uncertain, unassessed)
Genus Chernites Gistl, 1847 (uncertain, unassessed)
Genus Chersina Beck, 1837 (uncertain, unassessed)
Genus Chersodespoena Sykes, 1900 (uncertain, unassessed)
Genus Chersomitra Martens in Albers, 1860 (uncertain, unassessed)
Genus Chetosyna Baker, 1941 (uncertain, unassessed)
Genus Chevronais Wurtz, 1951 † (uncertain, unassessed)
Genus Chicoracea Griffith & Pidgeon, 1834 (uncertain, unassessed)
Genus Chilocyclus Gill, 1863 (uncertain, unassessed)
Genus Chilocystis Watson, 1934 (uncertain, unassessed)
Genus Chilogymnus Jousseaume, 1894 (uncertain, unassessed)
Genus Chilogymnus Ehrenberg, 1831 (uncertain, unassessed)
Genus Chilonopsides Desmarest in Chenu, 1859 (uncertain, unassessed)
Genus Chimotrema Rafinesque, 1819 (uncertain, unassessed)
Genus Chiridioteuthis Pfeffer, 1912 (uncertain, unassessed)
Genus Chiripollia Iredale, 1929 (uncertain, unassessed)
Genus Chiroktisma Gude, 1913 (uncertain, unassessed)
Genus Chiromia d'Orbigny (uncertain, unassessed)
Genus Chirostrema Cristofori & Jan (uncertain, unassessed)
Genus Chirsodus Piette, 1875 (uncertain, unassessed)
Genus Chitonella Deshayes, 1830 (uncertain, unassessed)
Genus Chitonichnus Matsukuma & Tsubaki, 1995 (uncertain, unassessed)
Genus Chitoniscus Dall, 1882 (uncertain, unassessed)
Genus Chitonites Herrmannsen, 1846 (uncertain, unassessed)
Genus Chitontypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Chittia Adams, 1858 (uncertain, unassessed)
Genus Chlamydea Westerlund, 1886 † (uncertain, unassessed)
Genus Chlamydoglyphis Pilsbry, 1890 (uncertain, unassessed)
Genus Chlamydolimax Wenz, 1947 (uncertain, unassessed)
Genus Chlanidita Clessin, 1885 (uncertain, unassessed)
Genus Chlorostracia Mabille, 1889 (uncertain, unassessed)
Genus Choanompholus Kobelt, 1909 (uncertain, unassessed)
Genus Choanopomops Baker, 1928 (uncertain, unassessed)
Genus Choanoteuthis Fischer, 1951 † (uncertain, unassessed)
Genus Chondras Gray, 1821 (uncertain, unassessed)
Genus Chondritortus Monterosato in Cecconi, 1908 (uncertain, unassessed)
Genus Chondroplax Thiele in Troschel, 1893 (uncertain, unassessed)
Genus Chondropleuratypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Chondropomartes Henderson & Bartsch, 1920 (uncertain, unassessed)
Genus Chondropomatus Henderson & Bartsch, 1920 (uncertain, unassessed)
Genus Chondropomisca Torre & Bartsch, 1938 (uncertain, unassessed)
Genus Chondropomodes Torre & Bartsch, 1938 (uncertain, unassessed)
Genus Chondrops Bartsch, 1946 (uncertain, unassessed)
Genus Chondrothyroma Henderson & Bartsch, 1920 (uncertain, unassessed)
Genus Chondrulopsis Westerlund, 1887 (uncertain, unassessed)
Genus Chondrulus Westerlund, 1887 (uncertain, unassessed)
Genus Chonechiton Dall, 1882 (uncertain, unassessed)
Genus Choneplaxtypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Chonocotyle Novák, 1891 (uncertain, unassessed)
Genus Choriplaxtypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Choristoma Cristofori & Jan, 1832 (uncertain, unassessed)
Genus Choristoma Hartmann, 1840 (uncertain, unassessed)
Genus Chorolimax Westerlund, 1894 (uncertain, unassessed)
Genus Christolia Rollier, 1909 † (uncertain, unassessed)
Genus Chromatosphaera Pilsbry in Tryon & Pilsbry, 1892 (uncertain, unassessed)
Genus Chromodoridella Eliot, 1905 (uncertain, unassessed)
Genus Chromolimax Pini, 1876 (uncertain, unassessed)
Genus Chronoceryx Iredale, 1941 (uncertain, unassessed)
Genus Chronos Robson, 1914 (uncertain, unassessed)
Genus Chrysalidimilax Kobelt, 1914 (uncertain, unassessed)
Genus Chrysalidomilax Simroth, 1912 (uncertain, unassessed)
Genus Chrysalites Herrmannsen, 1847 (uncertain, unassessed)
Genus Chrysammonites Herrmannsen, 1847 (uncertain, unassessed)
Genus Chrysaor de Montfort, 1808 (uncertain, unassessed)
Genus Chrysator Montfort, 1808 (uncertain, unassessed)
Genus Chryserpes Pilsbry in Tryon & Pilsbry, 1906 (uncertain, unassessed)
Genus Chrysias Pilsbry, 1929 (uncertain, unassessed)
Genus Chrysolites Herrmannsen, 1847 (uncertain, unassessed)
Genus Chrysopseudodon Haas in Martini & Chemnitz, 1921 (uncertain, unassessed)
Genus Chuchleconus Frýda, 1998 † (uncertain, unassessed)
Genus Cicatrites Anon., 1901 † (uncertain, unassessed)
Genus Cichoracea Berthold in Latreille, 1827 (uncertain, unassessed)
Genus Cichorax Reichenbach, 1828 (uncertain, unassessed)
Genus Ciclostoma Scacchi, 1836 (uncertain, unassessed)
Genus Cidaris Swainson, 1840 (uncertain, unassessed)
Genus Cigclirina Woodring, 1928 † (uncertain, unassessed)
Genus Ciliatana Caziot, 1908 (uncertain, unassessed)
Genus Cinclidoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Cinctaspira Powell, 1935 † (uncertain, unassessed)
Genus Cinctelliana Caziot, 1908 (uncertain, unassessed)
Genus Cinerascens Wagner, 1897 (uncertain, unassessed)
Genus Cingula Gould, 1841 (uncertain, unassessed)
Genus Cingulatiana Caziot, 1908 (uncertain, unassessed)
Genus Cingulus Turton, 1825 (uncertain, unassessed)
Genus Cinuliopsis Whiteaves, 1879 † (uncertain, unassessed)
Genus Cionella Beck, 1837 (uncertain, unassessed)
Genus Ciplyella Vincent, 1930 (uncertain, unassessed)
Genus Circamelania Yen, 1951 † (uncertain, unassessed)
Genus Circinata Herrmannsen, 1847 (uncertain, unassessed)
Genus Circinnata Herrmannsen, 1852 (uncertain, unassessed)
Genus Cirna Pallary, 1928 (uncertain, unassessed)
Genus Cirridius Koninck, 1881 † (uncertain, unassessed)
Genus Cirrobasis Conrad, 1874 (uncertain, unassessed)
Genus Cirropteron Sars, 1835 (uncertain, unassessed)
Genus Cirrus Koninck, 1843 † (uncertain, unassessed)
Genus Cirthoceratites Deshayes in Cuvier, ? 1838 (uncertain, unassessed)
Genus Cisalpina Wagner, 1897 (uncertain, unassessed)
Genus Cisalpinana Fagot, 1884 (uncertain, unassessed)
Genus Cista Hübner, 1810 (uncertain, unassessed)
Genus Cithara Herrmannsen, 1847 (uncertain, unassessed)
Genus Citharaedus Bronn, 1848 † (uncertain, unassessed)
Genus Citharoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Citharoedus Herrmannsen, 1847 (uncertain, unassessed)
Genus Citrina Wagner, 1905 (uncertain, unassessed)
Genus Cladophora Gray, 1847 (uncertain, unassessed)
Genus Cladophragmus Raymond, 1931 † (uncertain, unassessed)
Genus Clanculella Sacco in Bellardi & Sacco, 1896 (uncertain, unassessed)
Genus Clandestinum Stoliczka, 1867 † (uncertain, unassessed)
Genus Claneophila Gray, 1858 (uncertain, unassessed)
Genus Clarkia Koninck, 1878 (uncertain, unassessed)
Genus Clastoteuthis Lang, 1928 † (uncertain, unassessed)
Genus Clathrocoelia Hall, 1879 † (uncertain, unassessed)
Genus Clathrolima Cossmann, 1908 (uncertain, unassessed)
Genus Clathropodium Westerlund, 1897 (uncertain, unassessed)
Genus Clathrorthalicus Strebel, 1909 (uncertain, unassessed)
Genus Clausaria Menke, 1828 (uncertain, unassessed)
Genus Clausila Kobelt, 1913 (uncertain, unassessed)
Genus Clausiliastra Pfeiffer, 1855 (uncertain, unassessed)
Genus Clausilina Ehrenberg, 1831 (uncertain, unassessed)
Genus Clausiliopsis Möllendorff, 1901 (uncertain, unassessed)
Genus Clavagella Gray, 1840 (uncertain, unassessed)
Genus Clavifusus Conrad, 1866 † (uncertain, unassessed)
Genus Cleanthus Gray, 1847 (uncertain, unassessed)
Genus Cleidomera Conrad, 1866 (uncertain, unassessed)
Genus Cleidotheca Salter, 1866 † (uncertain, unassessed)
Genus Clenchipoma Bartsch, 1946 (uncertain, unassessed)
Genus Cleobis Dana, 1847 (uncertain, unassessed)
Genus Cleone Gistl, 1848 (uncertain, unassessed)
Genus Cleostyla Dall, 1896 (uncertain, unassessed)
Genus Clessinella Waagen, 1905 (uncertain, unassessed)
Genus Clessinia Piaget, 1913 (uncertain, unassessed)
Genus Clessinia Doering, 1874 (uncertain, unassessed)
Genus Cletella Strand, 1928 (uncertain, unassessed)
Genus Climacoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Climactichnites Logan, 1860 † (uncertain, unassessed)
Genus Clinotellina Schone & Schubert, 1996 † (uncertain, unassessed)
Genus Clioderma Hall, 1861 (uncertain, unassessed)
Genus Cliodita Quoy & Gaimard, 1825 (uncertain, unassessed)
Genus Clione Rafinesque, 1815 (uncertain, unassessed)
Genus Cloealia Beck, 1847 (uncertain, unassessed)
Genus Closilia Spix in d'Orbigny, 1835 (uncertain, unassessed)
Genus Clossonnaria Férussac, 1821 (uncertain, unassessed)
Genus Clotho Faujas de St. Fond, 1808 (uncertain, unassessed)
Genus Clotho de Blainville, 1824 (uncertain, unassessed)
Genus Clydonopoma Pilsbry, 1933 (uncertain, unassessed)
Genus Clymenis Gray, 1842 (uncertain, unassessed)
Genus Clymenites Münster, 1835 (uncertain, unassessed)
Genus Clypeidella Gray, 1855 (uncertain, unassessed)
Genus Clypeus Scacchi, 1833 (uncertain, unassessed)
Genus Clypites Waagen, 1895 † (uncertain, unassessed)
Genus Clytia Hartman, 1881 (uncertain, unassessed)
Genus Clytropelta Heynemann, 1867 (uncertain, unassessed)
Genus Cnesticystis Baker, 1938 (uncertain, unassessed)
Genus Cnisma Mayer, 1868 (uncertain, unassessed)
Genus Cobracephalus Whidborne, 1897 † (uncertain, unassessed)
Genus Cobresia Studer, 1789 (uncertain, unassessed)
Genus Cobresia Hübner, 1810 (uncertain, unassessed)
Genus Coccinella Herrmannsen, 1847 (uncertain, unassessed)
Genus Cochlea da Costa, 1778 (uncertain, unassessed)
Genus Cochlear Mörch, 1877 (uncertain, unassessed)
Genus Cochlearia Braun in Münster, 1841 (uncertain, unassessed)
Genus Cochlicarina Brown, 1843 † (uncertain, unassessed)
Genus Cochlichondra Jan, 1830 (uncertain, unassessed)
Genus Cochliclona Jan, 1830 (uncertain, unassessed)
Genus Cochlicopa Swainson, 1840 (uncertain, unassessed)
Genus Cochlidium Gray, 1850 (uncertain, unassessed)
Genus Cochlocycla Jan, 1830 (uncertain, unassessed)
Genus Cochlodon d'Orbigny, 1835 (uncertain, unassessed)
Genus Cochlogena Férussac, 1821 (uncertain, unassessed)
Genus Cochlogibba Jan, 1830 (uncertain, unassessed)
Genus Cochlohydra Férussac, 1821 (uncertain, unassessed)
Genus Cochlolepas Adams, 1854 (uncertain, unassessed)
Genus Cochlopupa Jan, 1830 (uncertain, unassessed)
Genus Cochlycopa Hanley in Swainson, 1841 (uncertain, unassessed)
Genus Cocopupa Pilsbry & Cooke in Tryon & Pilsbry, 1920 (uncertain, unassessed)
Genus Cocoslens Baker, 1941 (uncertain, unassessed)
Genus Codrigtonia Kobelt, 1903 (uncertain, unassessed)
Genus Coelacanthia Brusina, 1897 (uncertain, unassessed)
Genus Coelatiana Caziot, 1910 (uncertain, unassessed)
Genus Coelatura Martens, 1877 (uncertain, unassessed)
Genus Coelocrossostoma Roman, 1928 † (uncertain, unassessed)
Genus Coelopoma Adams, 1867 (uncertain, unassessed)
Genus Coelopoma Benson, 1855 (uncertain, unassessed)
Genus Coelorus Pilsbry, 1900 (uncertain, unassessed)
Genus Coelostrobilops Pilsbry, 1931 (uncertain, unassessed)
Genus Coelponatica Valette, 1925 † (uncertain, unassessed)
Genus Coenatoria Held, 1837 (uncertain, unassessed)
Genus Coleoloides Walcott, 1889 † (uncertain, unassessed)
Genus Coleoprion Sandberger, 1847 (uncertain, unassessed)
Genus Coliolus Tapparone-Canefri, 1886 (uncertain, unassessed)
Genus Collignoniceras van Hoepen, 1955 † (uncertain, unassessed)
Genus Collobiana Locard, 1890 (uncertain, unassessed)
Genus Collotites Jeannet, 1951 † (uncertain, unassessed)
Genus Colobostyloides Bartsch, 1946 (uncertain, unassessed)
Genus Colombellarius Duméril, 1806 (uncertain, unassessed)
Genus Colombiaticeras Royo y Gomez, 1945 † (uncertain, unassessed)
Genus Colpanostoma Bourguignat, 1889 (uncertain, unassessed)
Genus Colpoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Colpoceras Hall, 1850 (uncertain, unassessed)
Genus Columba Lea, 1837 (uncertain, unassessed)
Genus Columbus Montfort, 1810 (uncertain, unassessed)
Genus Columellina Bivona-Bernardi, 1832 (uncertain, unassessed)
Genus Columna Perry, 1811 (uncertain, unassessed)
Genus Columna Cooper, 1892 (uncertain, unassessed)
Genus Columnium Chiaje, 1844 (uncertain, unassessed)
Genus Columplica Hartmann, 1843 (uncertain, unassessed)
Genus Colymbetes Hübner, 1810 (uncertain, unassessed)
Genus Cominia Brown, 1844 (uncertain, unassessed)
Genus Comorina Simrot in Voeltzkow, 1910 (uncertain, unassessed)
Genus Comoropeas Pilsbry in Tryon & Pilsbry, 1906 (uncertain, unassessed)
Genus Complanatiana Locard, 1890 (uncertain, unassessed)
Genus Compsochiton Hoare & Cook, 2000 † (uncertain, unassessed)
Genus Compsopleura Conrad, 1865 (uncertain, unassessed)
Genus Conaemella Thiele, 1925 (uncertain, unassessed)
Genus Conarius Duméril, 1806 (uncertain, unassessed)
Genus Concentrica Wagner, 1905 (uncertain, unassessed)
Genus Conchites Schläpfer, 1821 (uncertain, unassessed)
Genus Concholepas Solander, 1786 (uncertain, unassessed)
Genus Conchotyra Haast, 1871 † (uncertain, unassessed)
Genus Conchyliolithus Martin, 1809 (uncertain, unassessed)
Genus Conchylium Cuvier, 1817 (uncertain, unassessed)
Genus Conchyta Sowerby, 1842 (uncertain, unassessed)
Genus Concula Herrmannsen, 1847 (uncertain, unassessed)
Genus Condyloceramus Heinz, 1932 † (uncertain, unassessed)
Genus Conella Adams, 1853 (uncertain, unassessed)
Genus Coneulota Pfeffer, 1929 † (uncertain, unassessed)
Genus Congeriomya Andrusov, 1897 † (uncertain, unassessed)
Genus Congohelix Pfeffer, 1931 (uncertain, unassessed)
Genus Conicana Caziot, 1910 (uncertain, unassessed)
Genus Coniclus Albers, 1850 (uncertain, unassessed)
Genus Conilites Schlotheim, 1820 (uncertain, unassessed)
Genus Conilites Lamarck, 1822 (uncertain, unassessed)
Genus Conites Herrmannsen, 1847 (uncertain, unassessed)
Genus Conoceras Bronn, 1835 (uncertain, unassessed)
Genus Conoceratites d'Archiac & Verneuil, 1842 † (uncertain, unassessed)
Genus Conocypraea Oppenheim, 1901 † (uncertain, unassessed)
Genus Conogulella Pilsbry, 1919 (uncertain, unassessed)
Genus Conohelix Sowerby, 1828 (uncertain, unassessed)
Genus Conolites Swainson, 1835 (uncertain, unassessed)
Genus Conospirus Gregorio, 1890 † (uncertain, unassessed)
Genus Conotubularia Troost, 1834 † (uncertain, unassessed)
Genus Conovula Schweigger, 1820 (uncertain, unassessed)
Genus Conovulum Sowerby, 1842 (uncertain, unassessed)
Genus Conovulus Lamarck, 1816 (uncertain, unassessed)
Genus Conovulus Beck, 1838 (uncertain, unassessed)
Genus Conradia Wenz, 1925 (uncertain, unassessed)
Genus Conspurcatiana Fagot, 1891 (uncertain, unassessed)
Genus Constricta Böttger, 1877 † (uncertain, unassessed)
Genus Constrictiana Fagot, 1890 (uncertain, unassessed)
Genus Contermina Wagner, 1909 (uncertain, unassessed)
Genus Contorta Megerle in Villa, 1841 (uncertain, unassessed)
Genus Contortia Sacco in Bellardi & Sacco, 1894 (uncertain, unassessed)
Genus Conularia Miller in Sowerby, 1820 (uncertain, unassessed)
Genus Conulema Stoliczka, 1871 (uncertain, unassessed)
Genus Conulites Cozzens, 1846 (uncertain, unassessed)
Genus Conulopolita Böttger, 1879 (uncertain, unassessed)
Genus Conulus Küster in Martini & Chemnitz, 1844 (uncertain, unassessed)
Genus Convexiterbeccus Shimansky, 1947 (uncertain, unassessed)
Genus Coodea Servain, 1891 (uncertain, unassessed)
Genus Coptaxis Cossmann, 1901 † (uncertain, unassessed)
Genus Cor Mörch, 1853 (uncertain, unassessed)
Genus Corallina Bucquoy, Dautzenberg & Dollfus, 1882 (uncertain, unassessed)
Genus Coralliofusus Kuroda, 1953 (uncertain, unassessed)
Genus Corcyrensiana Fagot, 1890 (uncertain, unassessed)
Genus Cordium Gistl, 1848 (uncertain, unassessed)
Genus Cordula Gray, 1852 (uncertain, unassessed)
Genus Corimya Agassiz in Sowerby, 1884 (uncertain, unassessed)
Genus Cornea Megerle, 1811 (uncertain, unassessed)
Genus Cornelia Mayer, 1887 † (uncertain, unassessed)
Genus Cornelium Chiaje, 1844 (uncertain, unassessed)
Genus Cornetia Fischer, 1885 (uncertain, unassessed)
Genus Corniculum Herrmannsen, 1847 (uncertain, unassessed)
Genus Cornu Schumacher, 1817 (uncertain, unassessed)
Genus Cornucaprina Futterer, 1892 † (uncertain, unassessed)
Genus Cornucopia Thomson, 1802 (uncertain, unassessed)
Genus Corona Jekelius, 1932 † (uncertain, unassessed)
Genus Corona Albers, 1850 (uncertain, unassessed)
Genus Coronaria Lowe, 1852 (uncertain, unassessed)
Genus Coronaria Fabricius, 1823 (uncertain, unassessed)
Genus Coronilla Perner in Barrande, 1907 † (uncertain, unassessed)
Genus Corrugaria Conrad, 1853 (uncertain, unassessed)
Genus Corrugata Böttger, 1878 (uncertain, unassessed)
Genus Corulites Herrmannsen, 1852 (uncertain, unassessed)
Genus Corynadenia Berry, 1940 (uncertain, unassessed)
Genus Cosinia Stache, 1880 † (uncertain, unassessed)
Genus Cosmioceramus Heinz, 1932 † (uncertain, unassessed)
Genus Cosmoceratites Schrammen, 1928 † (uncertain, unassessed)
Genus Cosmogyria Buckman, 1899 † (uncertain, unassessed)
Genus Cosmolytoceras Spath, 1924 † (uncertain, unassessed)
Genus Cosmomenus Baker, 1941 (uncertain, unassessed)
Genus Cosmopseudodon Haas, 1920 (uncertain, unassessed)
Genus Cosmostylina Dubar, 1945 † (uncertain, unassessed)
Genus Cossmannia Babor, 1897 (uncertain, unassessed)
Genus Costaea Tiberi, 1881 (uncertain, unassessed)
Genus Costanucula Habe, 1951 (uncertain, unassessed)
Genus Costatella Kimakowicz, 1890 (uncertain, unassessed)
Genus Costatella Dall, 1870 † (uncertain, unassessed)
Genus Costatiana Bourguignat, 1884 (uncertain, unassessed)
Genus Costatofusus Tomlin, 1929 (uncertain, unassessed)
Genus Costatoscala Sacco in Bellardi & Sacco, 1891 (uncertain, unassessed)
Genus Costavarix Baker, 1935 (uncertain, unassessed)
Genus Costellifer Meek, 1863 (uncertain, unassessed)
Genus Costigrammoceras Buckman, 1926 † (uncertain, unassessed)
Genus Costigulella Pilsbry, 1919 (uncertain, unassessed)
Genus Costorbis Lindholm, 1926 (uncertain, unassessed)
Genus Costulofusus Cossmann, 1896 (uncertain, unassessed)
Genus Cotitrochus Baker, 1941 (uncertain, unassessed)
Genus Cotunnium Chiaje, 1844 (uncertain, unassessed)
Genus Cotylelithus Herrmannsen, 1847 (uncertain, unassessed)
Genus Coulboisia Bourguignat, 1888 (uncertain, unassessed)
Genus Couphaniana Bourguignat, 1884 (uncertain, unassessed)
Genus Courquiniana Locard, 1889 (uncertain, unassessed)
Genus Covolina Mörch, 1855 (uncertain, unassessed)
Genus Cowdaleoceras Bisat, 1952 † (uncertain, unassessed)
Genus Coxiola Pfeffer, 1929 † (uncertain, unassessed)
Genus Coya Ryckholt, 1852 (uncertain, unassessed)
Genus Craspedodon Bittner, 1901 † (uncertain, unassessed)
Genus Craspedodonta Küster, 1842 (uncertain, unassessed)
Genus Crassialaria Dahmer, 1932 (uncertain, unassessed)
Genus Crassicoeloceras Buckman, 1926 † (uncertain, unassessed)
Genus Crassidorsa Brown, 1843 † (uncertain, unassessed)
Genus Crassilabriana Fagot, 1891 (uncertain, unassessed)
Genus Crassilinoides Alberti, 1996 † (uncertain, unassessed)
Genus Crassitaia Annandale, 1919 † (uncertain, unassessed)
Genus Crassitesta Simpson, 1900 (uncertain, unassessed)
Genus Craterarion Taylor, 1954 † (uncertain, unassessed)
Genus Cratere Porro, 1838 (uncertain, unassessed)
Genus Cratium de Blainville, 1818 (uncertain, unassessed)
Genus Cratomya Rollier, 1913 † (uncertain, unassessed)
Genus Crenatinanina Germain, 1920 (uncertain, unassessed)
Genus Crendonina Buckman, 1925 † (uncertain, unassessed)
Genus Crendonites Buckman, 1923 † (uncertain, unassessed)
Genus Crenea Risso, 1826 (uncertain, unassessed)
Genus Crenilytoceras Buckman, 1926 † (uncertain, unassessed)
Genus Crenimargo Cossmann, 1902 (uncertain, unassessed)
Genus Creseidopsis Sandberger, 1889 (uncertain, unassessed)
Genus Cressa Westerlund, 1889 (uncertain, unassessed)
Genus Cressea Kobelt, 1904 (uncertain, unassessed)
Genus Cretagryphaea Arkell, 1934 (uncertain, unassessed)
Genus Cretica Böttger, 1878 (uncertain, unassessed)
Genus Cretozonites Kobelt in Rossmaessler, 1890 (uncertain, unassessed)
Genus Cribella Herrmannsen, 1852 (uncertain, unassessed)
Genus Crickia Buckman, 1899 † (uncertain, unassessed)
Genus Cricoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Cricomphalos de Blainville, 1818 (uncertain, unassessed)
Genus Cricophorus Kobelt & Möllendorff, 1897 (uncertain, unassessed)
Genus Crino Gistl, 1847 (uncertain, unassessed)
Genus Criocera Gray, 1842 (uncertain, unassessed)
Genus Crioconites Buckman, 1925 † (uncertain, unassessed)
Genus Criorcites Herrmannsen, 1847 (uncertain, unassessed)
Genus Criraria Jousseaume, 1884 (uncertain, unassessed)
Genus Crispatella Malinky, 2002 † (uncertain, unassessed)
Genus Cristaria Westerlund, 1884 (uncertain, unassessed)
Genus Crocochiton Cotton & Weeding, 1939 (uncertain, unassessed)
Genus Crossilla Thiele, 1927 (uncertain, unassessed)
Genus Crossostephanus Dall, 1908 (uncertain, unassessed)
Genus Crucita Westerlund, 1878 (uncertain, unassessed)
Genus Cryptaenia Eudes-Longchamps, 1864 † (uncertain, unassessed)
Genus Cryptaulus Bavay, 1903 (uncertain, unassessed)
Genus Cryptaulus Foerste, 1923 † (uncertain, unassessed)
Genus Cryptibycus Cockerell, 1898 (uncertain, unassessed)
Genus Cryptina Deshayes, 1835 † (uncertain, unassessed)
Genus Cryptoceras Barrande, 1846 † (uncertain, unassessed)
Genus Cryptochitontypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Cryptoconchus Guilding, 1829 (uncertain, unassessed)
Genus Cryptoconchustypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Cryptogirasia Godwin-Austen, 1908 (uncertain, unassessed)
Genus Cryptomphalus Dybowski & Grochmalicki, 1925 (uncertain, unassessed)
Genus Cryptomphalus Agassiz in Charpentier, 1837 (uncertain, unassessed)
Genus Cryptoplaxtypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Cryptothyra Menke, 1830 (uncertain, unassessed)
Genus Cryptozona Mörch, 1872 (uncertain, unassessed)
Genus Crystallinana Caziot, 1910 (uncertain, unassessed)
Genus Crystallus Lowe, 1855 (uncertain, unassessed)
Genus Ctenites Herrmannsen, 1847 (uncertain, unassessed)
Genus Cteniurus Rafinesque, 1814 (uncertain, unassessed)
Genus Ctenostreon Bayle, 1878 † (uncertain, unassessed)
Genus Cubaviana Baker, 1922 (uncertain, unassessed)
Genus Cuchillites Scott, 1939 † (uncertain, unassessed)
Genus Cuculites Herrmannsen, 1847 (uncertain, unassessed)
Genus Cuculla Seba, 1761 (uncertain, unassessed)
Genus Cucullea Michelin, 1838 † (uncertain, unassessed)
Genus Cucullella M'Coy, 1851 † (uncertain, unassessed)
Genus Cucullifera Conrad in Cope, 1875 † (uncertain, unassessed)
Genus Cufaea Gray, 1852 (uncertain, unassessed)
Genus Culana Gray, 1842 (uncertain, unassessed)
Genus Culmenella Clench, 1927 (uncertain, unassessed)
Genus Cultrigera Böhm, 1884 (uncertain, unassessed)
Genus Cunearia Spitz, 1907 † (uncertain, unassessed)
Genus Cunicula Swainson, 1840 (uncertain, unassessed)
Genus Cunula Pallary, 1936 (uncertain, unassessed)
Genus Curticaulis Simroth in Voeltzkow, 1913 (uncertain, unassessed)
Genus Curvidactylites Buckman, 1927 † (uncertain, unassessed)
Genus Curvirostra Herrmannsen, 1847 (uncertain, unassessed)
Genus Curvulites Rafinesque, 1831 (uncertain, unassessed)
Genus Cuspiteuthis Abel, 1916 † (uncertain, unassessed)
Genus Cyane Adams, 1870 (uncertain, unassessed)
Genus Cyanogaster Oken, 1823 (uncertain, unassessed)
Genus Cyanogaster de Blainville, 1825 (uncertain, unassessed)
Genus Cycladamsia Bartsch, 1942 (uncertain, unassessed)
Genus Cycladella Carpenter, 1865 (uncertain, unassessed)
Genus Cycladina Clessin, 1871 (uncertain, unassessed)
Genus Cycladina Berthold in Latreille, 1827 (uncertain, unassessed)
Genus Cycladites Krueger, 1823 (uncertain, unassessed)
Genus Cyclauchen Pilsbry, 1930 (uncertain, unassessed)
Genus Cyclemis Rafinesque, 1819 (uncertain, unassessed)
Genus Cyclidia Rolle, 1862 (uncertain, unassessed)
Genus Cycliscus Gude, 1911 (uncertain, unassessed)
Genus Cyclobakeria Bartsch, 1942 (uncertain, unassessed)
Genus Cyclocaymania Bartsch, 1942 (uncertain, unassessed)
Genus Cycloceramus Heinz, 1932 † (uncertain, unassessed)
Genus Cycloceras (uncertain, unassessed)
Genus Cycloceras Conrad (uncertain, unassessed)
Genus Cycloceratites Schrammen, 1928 † (uncertain, unassessed)
Genus Cyclocerion Bartsch, 1952 (uncertain, unassessed)
Genus Cyclocheila Conrad, 1874 (uncertain, unassessed)
Genus Cyclochilus Agassiz, 1845 (uncertain, unassessed)
Genus Cyclochittya Morrison, 1955 (uncertain, unassessed)
Genus Cyclocubana Torre & Bartsch, 1942 (uncertain, unassessed)
Genus Cyclocystis Watson, 1934 (uncertain, unassessed)
Genus Cyclodoma Swainson, 1840 (uncertain, unassessed)
Genus Cyclohelix Mörch, 1852 (uncertain, unassessed)
Genus Cyclohidalgoa Bartsch, 1942 (uncertain, unassessed)
Genus Cyclomera Conrad, 1866 (uncertain, unassessed)
Genus Cyclomonilearia Pfeffer, 1929 † (uncertain, unassessed)
Genus Cyclomya Simpson, 1900 (uncertain, unassessed)
Genus Cyclonautilus Hind, 1911 † (uncertain, unassessed)
Genus Cyclophoropsis Dautzenberg, 1908 (uncertain, unassessed)
Genus Cyclophorus Pfeiffer, 1847 (uncertain, unassessed)
Genus Cyclopoma Troschel, 1847 (uncertain, unassessed)
Genus Cyclopomops Bartsch & Morrison, 1942 (uncertain, unassessed)
Genus Cycloprocta Simroth in Voeltzkow, 1913 (uncertain, unassessed)
Genus Cyclorizoceras Foerste, 1930 (uncertain, unassessed)
Genus Cyclostreon Eichwald, 1868 (uncertain, unassessed)
Genus Cyclothyris Conrad in Kerr, 1875 † (uncertain, unassessed)
Genus Cyclotus Edwards, 1852 † (uncertain, unassessed)
Genus Cyclus Anton, 1837 (uncertain, unassessed)
Genus Cygnaeana Bourguignat, 1881 (uncertain, unassessed)
Genus Cyharella Monterosato, 1875 (uncertain, unassessed)
Genus Cylicoceras Buckman, 1899 † (uncertain, unassessed)
Genus Cylindraceana Caziot, 1908 (uncertain, unassessed)
Genus Cylindrella Deshayes, 1863 (uncertain, unassessed)
Genus Cylindrica Simpson, 1900 (uncertain, unassessed)
Genus Cylindrica Clessin, 1882 (uncertain, unassessed)
Genus Cylindrina Schlüter, 1838 (uncertain, unassessed)
Genus Cylindrocaulides Strand, 1928 (uncertain, unassessed)
Genus Cylindrocaulus Hoffmann, 1925 (uncertain, unassessed)
Genus Cylindrodes Hübner, 1810 (uncertain, unassessed)
Genus Cylindrogyra Repelin, 1902 (uncertain, unassessed)
Genus Cylindropalaina Möllendorff, 1897 (uncertain, unassessed)
Genus Cylindrophaedusa Böttger, 1877 † (uncertain, unassessed)
Genus Cylindrus Herrmannsen, 1852 (uncertain, unassessed)
Genus Cylindus Müller, 1766 (uncertain, unassessed)
Genus Cylophorus Clessin, 1887 (uncertain, unassessed)
Genus Cymatia Scudder, 1882 (uncertain, unassessed)
Genus Cymatoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Cymatocyclas Dall, 1903 (uncertain, unassessed)
Genus Cymatodus Dall, 1882 (uncertain, unassessed)
Genus Cymatosphinctes Buckman, 1923 † (uncertain, unassessed)
Genus Cymbancilla Fischer, 1881 (uncertain, unassessed)
Genus Cymbelia Eschricht, 1837 (uncertain, unassessed)
Genus Cymbiola Gray, 1847 (uncertain, unassessed)
Genus Cymbium da Costa, 1776 (uncertain, unassessed)
Genus Cymbulia Ehrenberg, 1862 (uncertain, unassessed)
Genus Cymbulostrea Sacco in Bellardi & Sacco, 1897 (uncertain, unassessed)
Genus Cymodocaea d'Orbigny, 1835 (uncertain, unassessed)
Genus Cymodocea d'Orbigny, 1836 (uncertain, unassessed)
Genus Cymotropis Martens in Albers, 1860 (uncertain, unassessed)
Genus Cyphidoeana Servain, 1881 (uncertain, unassessed)
Genus Cyphoceras Buckman, 1899 † (uncertain, unassessed)
Genus Cyphoma Link, 1807 (uncertain, unassessed)
Genus Cyphoxis Rafinesque, 1818 (uncertain, unassessed)
Genus Cypraeacites Schlotheim, 1820 (uncertain, unassessed)
Genus Cypraeactaeon White, 1887 (uncertain, unassessed)
Genus Cypreovula Fleming, 1828 (uncertain, unassessed)
Genus Cypria Simroth, 1910 (uncertain, unassessed)
Genus Cypriarius Duméril, 1806 (uncertain, unassessed)
Genus Cyprinella Gabb, 1864 † (uncertain, unassessed)
Genus Cypriniadea Rovereto, 1900 † (uncertain, unassessed)
Genus Cyprinopsis Conrad, 1869 (uncertain, unassessed)
Genus Cyptendocerina Ulrich, Foerste, Miller & Unklesbay, 1944 † (uncertain, unassessed)
Genus Cyrachaea Leach, 1847 (uncertain, unassessed)
Genus Cyrenastrum Bourguignat, 1854 (uncertain, unassessed)
Genus Cyrenocapsa Fischer, 1872 (uncertain, unassessed)
Genus Cyrenocyclas Agassiz, 1846 (uncertain, unassessed)
Genus Cyrenodonta Adams, 1857 (uncertain, unassessed)
Genus Cyrenolimopsis Habe in Kuroda, 1953 † (uncertain, unassessed)
Genus Cyria Leach, 1818 (uncertain, unassessed)
Genus Cyrillium Chiaje, 1844 (uncertain, unassessed)
Genus Cyrniacana Fagot, 1892 (uncertain, unassessed)
Genus Cyrsocrassiscala Sacco, 1891 (uncertain, unassessed)
Genus Cyrtendoceras Remelé, 1886 (uncertain, unassessed)
Genus Cyrthoceras Kolenati, 1849 (uncertain, unassessed)
Genus Cyrthoceratites d'Archiac & de Verneuil, 1842 † (uncertain, unassessed)
Genus Cyrthocerus King, 1844 (uncertain, unassessed)
Genus Cyrtoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Cyrtoceratites Bronn, 1834 (uncertain, unassessed)
Genus Cyrtochesus Kobelt, 1892 (uncertain, unassessed)
Genus Cyrtochilella Strand, 1929 † (uncertain, unassessed)
Genus Cyrtochilus Meek, 1876 † (uncertain, unassessed)
Genus Cyrtoconella Patrulius, 1996 † (uncertain, unassessed)
Genus Cyrtodontopsis Frech, 1891 † (uncertain, unassessed)
Genus Cyrtonybyoceras Shimizu & Obata, 1935 (uncertain, unassessed)
Genus Cyrtosolen Herrmannsen, 1848 (uncertain, unassessed)
Genus Cyrtotheca Hicks, 1872 † (uncertain, unassessed)
Genus Cyrtusiana Locard, 1889 (uncertain, unassessed)
Genus Cystia Deshayes, 1844 (uncertain, unassessed)
Genus Cysticopsis Martens in Albers, 1860 (uncertain, unassessed)
Genus Cysticopsis Mörch, 1852 (uncertain, unassessed)
Genus Cythereites Krueger, 1823 (uncertain, unassessed)
Genus Dacryomia Gressly, 1838 † (uncertain, unassessed)
Genus Dacryomya Loriol, 1899 † (uncertain, unassessed)
Genus Dacrystoma Crosse & Fischer, 1871 (uncertain, unassessed)
Genus Dactyliola Weinkauff, 1878 (uncertain, unassessed)
Genus Dactylius Sandberger, 1872 (uncertain, unassessed)
Genus Dactyloceramus Heinz, 1932 † (uncertain, unassessed)
Genus Dactylogammites Buckman, 1925 † (uncertain, unassessed)
Genus Dactylomela Jhering, 1915 (uncertain, unassessed)
Genus Dactylomorpha Gude, 1911 (uncertain, unassessed)
Genus Dactylus Jousseaume, 1898 (uncertain, unassessed)
Genus Daghestanites Glazunova, 1953 † (uncertain, unassessed)
Genus Dalainoria Lindholm, 1927 (uncertain, unassessed)
Genus Dalila Barrande, 1881 † (uncertain, unassessed)
Genus Dalingia Godwin-Austen, 1907 (uncertain, unassessed)
Genus Dalliconcha White, 1887 (uncertain, unassessed)
Genus Dalmanitheca Qian, Zhu & Jiang, 2000 † (uncertain, unassessed)
Genus Dalmatica Böttger, 1877 † (uncertain, unassessed)
Genus Dalmatina Wagner, 1897 (uncertain, unassessed)
Genus Damalis Leach, 1847 (uncertain, unassessed)
Genus Damaris Swainson, 1823 (uncertain, unassessed)
Genus Damesiella Tornquist, 1898 † (uncertain, unassessed)
Genus Daradiceras Sornay & Tessier, 1949 † (uncertain, unassessed)
Genus Dasyconus Baker, 1938 (uncertain, unassessed)
Genus Dasytherion Mabille, 1887 (uncertain, unassessed)
Genus Dauciscala Boury, 1917 † (uncertain, unassessed)
Genus Daudebardiella Böttger, 1905 (uncertain, unassessed)
Genus Davidella Zhegallo in Esakova & Zhegallo, 1996 † (uncertain, unassessed)
Genus Davidia Hicks, 1873 † (uncertain, unassessed)
Genus Dawsonia Dall, 1882 (uncertain, unassessed)
Genus Dayeconcha Wang, 1993 † (uncertain, unassessed)
Genus Debeauxhelix Bacci, 1941 (uncertain, unassessed)
Genus Dechenia Spriestersbach, 1915 † (uncertain, unassessed)
Genus Decollatiana Caziot, 1910 (uncertain, unassessed)
Genus Defonticeras McLearn, 1927 † (uncertain, unassessed)
Genus Defossiceras Buckman, 1913 † (uncertain, unassessed)
Genus Dekhania Godwin-Austen, 1888 (uncertain, unassessed)
Genus Delawarella Collignon, 1948 † (uncertain, unassessed)
Genus Delessertia Pallary, 1939 (uncertain, unassessed)
Genus Delevieleusia Hagenmüller, 1885 (uncertain, unassessed)
Genus Delomphalus Hartmann, 1842 (uncertain, unassessed)
Genus Delomphalus Agassiz in Charpentier, 1837 (uncertain, unassessed)
Genus Delpeya Collignon, 1949 † (uncertain, unassessed)
Genus Deltoceras Buckman, 1902 † (uncertain, unassessed)
Genus Deltostrigites Buckman, 1924 † (uncertain, unassessed)
Genus Deltotoceras Buckman, 1904 † (uncertain, unassessed)
Genus Demanetia Maillieux, 1937 (uncertain, unassessed)
Genus Demarestia Hartmann, 1840 (uncertain, unassessed)
Genus Dendrocochlis Pilsbry & Brown, 1910 (uncertain, unassessed)
Genus Dendrotoxon Pollonera, 1911 (uncertain, unassessed)
Genus Deniharpa Iredale, 1931 (uncertain, unassessed)
Genus Dentaliopsis Gray, 1847 (uncertain, unassessed)
Genus Dentalis Herrmannsen, 1847 (uncertain, unassessed)
Genus Dentalites Gmelin, 1791 (uncertain, unassessed)
Genus Dentatobeccus Shimansky, 1947 † (uncertain, unassessed)
Genus Dentatus Gray, 1847 (uncertain, unassessed)
Genus Dentaxis Pilsbry in Tryon & Pilsbry, 1902 (uncertain, unassessed)
Genus Dentellaria Schumacher, 1817 (uncertain, unassessed)
Genus Dentellaria Beck, 1837 (uncertain, unassessed)
Genus Dentellocaracolus Oppenheim, 1890 (uncertain, unassessed)
Genus Denticuloglabella Sacco, 1890 (uncertain, unassessed)
Genus Dentiomodiolus Iredale, 1939 (uncertain, unassessed)
Genus Dentiora Pease, 1863 (uncertain, unassessed)
Genus Dentipes Müller in Slabber, 1775 (uncertain, unassessed)
Genus Dentistomus Kimakowicz, 1890 (uncertain, unassessed)
Genus Depaoceras Buckman, 1902 † (uncertain, unassessed)
Genus Depressiana Bourguignat, 1881 (uncertain, unassessed)
Genus Dermatomaya Dall, 1908 (uncertain, unassessed)
Genus Deroceras Hyatt, 1867 (uncertain, unassessed)
Genus Deserticola Hesse in Rossmaessler, 1911 (uncertain, unassessed)
Genus Desfontainiana Locard, 1889 (uncertain, unassessed)
Genus Deshagesia Dall, 1898 (uncertain, unassessed)
Genus Desmieria Douvillé in Morgan, 1904 † (uncertain, unassessed)
Genus Desmocaulis Simroth in Voeltzkow, 1913 (uncertain, unassessed)
Genus Desmosphinctes Schindewolf, 1925 (uncertain, unassessed)
Genus Despaenella Baker, 1923 (uncertain, unassessed)
Genus Detracia Gray, 1847 (uncertain, unassessed)
Genus Detritana Fagot, 1891 (uncertain, unassessed)
Genus Detritiana Caziot, 1910 (uncertain, unassessed)
Genus Deussinia Stephenson, 1941 † (uncertain, unassessed)
Genus Devonzyga Horný, 1954 † (uncertain, unassessed)
Genus Dexiogyra Stabile, 1864 (uncertain, unassessed)
Genus Dextroformosana Böttger & Schmacker, 1894 (uncertain, unassessed)
Genus Diacerion Dall, 1894 (uncertain, unassessed)
Genus Diadelochiton Hoare, 2002 † (uncertain, unassessed)
Genus Diademoceras Flower, 1949 † (uncertain, unassessed)
Genus Diadiploceras Hyatt, 1884 (uncertain, unassessed)
Genus Diaglyptus Pilsbry in Tryon & Pilsbry, 1892 (uncertain, unassessed)
Genus Diagonaulus Pilsbry & McGinty, 1945 (uncertain, unassessed)
Genus Dianchora Sowerby, 1815 (uncertain, unassessed)
Genus Dianella Wang Bing, 1994 † (uncertain, unassessed)
Genus Dianisotis Rafinesque, 1831 (uncertain, unassessed)
Genus Dianxitheca Qian, Zhu & Jiang, 2000 † (uncertain, unassessed)
Genus Diaphana Guppy, 1895 (uncertain, unassessed)
Genus Diaphana Westerlund, 1886 † (uncertain, unassessed)
Genus Diaphanana Caziot, 1910 (uncertain, unassessed)
Genus Diaphanella Hesse, 1916 † (uncertain, unassessed)
Genus Diaphorites Fucini, 1896 (uncertain, unassessed)
Genus Diaphragmella Etheridge, 1917 (uncertain, unassessed)
Genus Diarthrochiton Fischer, 1885 † (uncertain, unassessed)
Genus Diastropha Gray in Turton, 1840 (uncertain, unassessed)
Genus Dibothrion Pfeiffer, 1855 (uncertain, unassessed)
Genus Diceratia Oken, 1815 (uncertain, unassessed)
Genus Diceratoptyx Pilsbry, 1905 (uncertain, unassessed)
Genus Dicharax Kobelt & Möllendorff, 1900 (uncertain, unassessed)
Genus Dicladus Rafinesque, 1814 (uncertain, unassessed)
Genus Dicolpus Philippi, 1887 (uncertain, unassessed)
Genus Dicroptera Rafinesque, 1814 (uncertain, unassessed)
Genus Dictyethis Rafinesque, 1814 (uncertain, unassessed)
Genus Dictyoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Dictyoglessula Pilsbry, 1919 (uncertain, unassessed)
Genus Didacnomya Andrussov, 1923 † (uncertain, unassessed)
Genus Didomasta Iredale, 1941 (uncertain, unassessed)
Genus Dienerites Mojsisovics, 1902 † (uncertain, unassessed)
Genus Diepenheimia Preston, 1913 (uncertain, unassessed)
Genus Dierama Pfeiffer, 1877 (uncertain, unassessed)
Genus Dieretostoma Cossmann, 1888 (uncertain, unassessed)
Genus Difficilis Wagner, 1897 (uncertain, unassessed)
Genus Digerus Haas, 1937 (uncertain, unassessed)
Genus Digitata Fabricius, 1823 (uncertain, unassessed)
Genus Diglyptus Pilsbry in Tryon & Pilsbry, 1893 (uncertain, unassessed)
Genus Dignaxis Baker, 1939 (uncertain, unassessed)
Genus Digonioceras Hyatt, 1894 (uncertain, unassessed)
Genus Digoniomya Whidborne, 1897 † (uncertain, unassessed)
Genus Digulella Haas, 1934 (uncertain, unassessed)
Genus Dihangia Godwin-Austen, 1916 (uncertain, unassessed)
Genus Dikrangia Godwin-Austen, 1920 (uncertain, unassessed)
Genus Dimeres Barrande, 1867 (uncertain, unassessed)
Genus Dimeroceramus Heinz, 1932 † (uncertain, unassessed)
Genus Dimorion Barrande, 1867 † (uncertain, unassessed)
Genus Dimorphosoma Gardner, 1875 † (uncertain, unassessed)
Genus Dimyopsis Bittner, 1895 † (uncertain, unassessed)
Genus Dinoplaxtypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Diochiton Thiele in Troschel, 1893 (uncertain, unassessed)
Genus Diodorea Risso, 1826 (uncertain, unassessed)
Genus Diodus Gabb, 1868 † (uncertain, unassessed)
Genus Dioscuria Lindholm, 1927 (uncertain, unassessed)
Genus Diozoptyxis Cossmann, 1896 † (uncertain, unassessed)
Genus Diphragmoceras Hyatt in Eastman-Zittel, 1900 † (uncertain, unassessed)
Genus Diphyllis Oken, 1817 (uncertain, unassessed)
Genus Diphyllites Jullien, 1911 † (uncertain, unassessed)
Genus Diplasma Rafinesque, 1831 (uncertain, unassessed)
Genus Diploceras Conrad, 1842 (uncertain, unassessed)
Genus Diplocyma Pilsbry & Olsson, 1941 (uncertain, unassessed)
Genus Diplodiscus Westerlund, 1897 (uncertain, unassessed)
Genus Diplommoptychia Maillard, 1884 † (uncertain, unassessed)
Genus Diplopelycia Mörch, 1872 (uncertain, unassessed)
Genus Diplopinax Bartsch, 1918 (uncertain, unassessed)
Genus Diplopseudodon Haas in Martini & Chemnitz, 1921 (uncertain, unassessed)
Genus Diploptychia Möllendorff, 1895 (uncertain, unassessed)
Genus Diplopupina Iredale, 1937 (uncertain, unassessed)
Genus Diploroteuthis Lemoine, 1915 † (uncertain, unassessed)
Genus Diplosellites Buckman, 1925 † (uncertain, unassessed)
Genus Diplotoxon Simroth, 1897 (uncertain, unassessed)
Genus Dipsas Rafinesque, 1820 (uncertain, unassessed)
Genus Dipsas Leach, 1814 (uncertain, unassessed)
Genus Dipterophora Fuchs, 1919 † (uncertain, unassessed)
Genus Dipterophysis Pilsbry in Tryon & Pilsbry, 1896 (uncertain, unassessed)
Genus Diptychoceras Gabb, 1868 † (uncertain, unassessed)
Genus Dirhachis Whidborne, 1891 † (uncertain, unassessed)
Genus Discamphiceras Spath in Trechmann, 1923 † (uncertain, unassessed)
Genus Discella Gray in Turton, 1857 (uncertain, unassessed)
Genus Discites Bronn, 1848 † (uncertain, unassessed)
Genus Discobostryx Pilsbry & Olsson, 1949 (uncertain, unassessed)
Genus Discoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Discoceras Barrande, 1867 † (uncertain, unassessed)
Genus Discocirrus Ammon, 1893 † (uncertain, unassessed)
Genus Discoconulops Habe, 1946 (uncertain, unassessed)
Genus Discodoma Swainson, 1840 (uncertain, unassessed)
Genus Discolepis Ancey, 1904 (uncertain, unassessed)
Genus Discolites Emmons, 1855 † (uncertain, unassessed)
Genus Discorbis Férussac, 1822 (uncertain, unassessed)
Genus Discospira Semper, 1862 (uncertain, unassessed)
Genus Discostrobilops Pilsbry, 1928 (uncertain, unassessed)
Genus Discovermetulus Rovereto, 1904 † (uncertain, unassessed)
Genus Discozonites Pilsbry, 1924 (uncertain, unassessed)
Genus Disculus Schaufuss, 1869 (uncertain, unassessed)
Genus Discus Albers, 1850 (uncertain, unassessed)
Genus Discus Sandberger, 1875 (uncertain, unassessed)
Genus Disjunctaria Böttger, 1877 † (uncertain, unassessed)
Genus Dissimilites Sarkar, 1954 † (uncertain, unassessed)
Genus Dissita Kolesnikov, 1939 (uncertain, unassessed)
Genus Dissoroceras Buckman, 1902 † (uncertain, unassessed)
Genus Disteira Eichwald, 1843 (uncertain, unassessed)
Genus Disteustoma Iredale, 1941 (uncertain, unassessed)
Genus Distichia Brandt, 1833 (uncertain, unassessed)
Genus Distoechia Crosse, 1890 (uncertain, unassessed)
Genus Distomospira Dall, 1895 (uncertain, unassessed)
Genus Distorta Schumacher, 1817 (uncertain, unassessed)
Genus Ditaxopus Rafinesque, 1839 † (uncertain, unassessed)
Genus Diversicolor Wagner, 1905 (uncertain, unassessed)
Genus Diversicostata Wassoievic & Eberzin, 1930 † (uncertain, unassessed)
Genus Divisoceras Bubnoff, 1935 † (uncertain, unassessed)
Genus Djebaricana Fagot, 1883 (uncertain, unassessed)
Genus Djiboutia Vayssière, 1912 (uncertain, unassessed)
Genus Doeringina Ihering, 1929 (uncertain, unassessed)
Genus Doliana Caziot, 1908 (uncertain, unassessed)
Genus Doliaria Berthold in Latreille, 1827 (uncertain, unassessed)
Genus Dolichena Pilsbry, 1934 (uncertain, unassessed)
Genus Dolicheolis Finlay, 1926 (uncertain, unassessed)
Genus Dolicholestes Pilsbry in Tryon & Pilsbry, 1906 (uncertain, unassessed)
Genus Dolichostyla Pilsbry, 1896 (uncertain, unassessed)
Genus Dolikephalites Buckman, 1923 † (uncertain, unassessed)
Genus Doliocassis Kuroda, 1933 † (uncertain, unassessed)
Genus Doliolana Caziot, 1910 (uncertain, unassessed)
Genus Doliopsis Conrad, 1865 (uncertain, unassessed)
Genus Dolites Krueger, 1823 (uncertain, unassessed)
Genus Doloceratites Schrammen, 1928 † (uncertain, unassessed)
Genus Domax Anon., 1839 (uncertain, unassessed)
Genus Donaciarius Duméril, 1806 (uncertain, unassessed)
Genus Donacina Férussac, 1822 (uncertain, unassessed)
Genus Donacina Menke, 1828 (uncertain, unassessed)
Genus Donacites Schlotheim, 1813 (uncertain, unassessed)
Genus Donacites Gmelin, 1793 (uncertain, unassessed)
Genus Donacoceras Foerste, 1936 † (uncertain, unassessed)
Genus Donjuaniceras Basse, 1950 † (uncertain, unassessed)
Genus Dontostoma Adams, 1858 (uncertain, unassessed)
Genus Dorbignya Tate in Tate-Woodward, 1868 (uncertain, unassessed)
Genus Dorcasia Binney, 1878 (uncertain, unassessed)
Genus Dorcasidea Iredale, 1941 (uncertain, unassessed)
Genus Doridoeides Eliot & Evans, 1908 (uncertain, unassessed)
Genus Dorimorphe Audouin & Milne-Edwards, 1832 (uncertain, unassessed)
Genus Dorsomya Ryckholt, 1851 † (uncertain, unassessed)
Genus Dorvillea Gray, 1852 (uncertain, unassessed)
Genus Doryanthes Münster, 1846 (uncertain, unassessed)
Genus Dramelia Iredale, 1941 (uncertain, unassessed)
Genus Drepania Gregorio, 1930 † (uncertain, unassessed)
Genus Drepanocaulis Simroth in Voeltzkow, 1913 (uncertain, unassessed)
Genus Drepanoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Drepanoceras Hoepen, 1931 † (uncertain, unassessed)
Genus Drepanoconcha Zilch, 1949 † (uncertain, unassessed)
Genus Drepanoprocta Simroth in Voeltzkow, 1913 (uncertain, unassessed)
Genus Dresseroceras Ulrich, Foerste, Miller & Unklesbay, 1944 † (uncertain, unassessed)
Genus Drilolestes Lindholm, 1925 (uncertain, unassessed)
Genus Drinia Kobelt, 1913 (uncertain, unassessed)
Genus Drusia Gray, 1855 (uncertain, unassessed)
Genus Dryochoceras Morgan, 1924 † (uncertain, unassessed)
Genus Dryocochlias Möllendorff, 1898 (uncertain, unassessed)
Genus Dryocochlyas Kobelt, 1912 (uncertain, unassessed)
Genus Dubiana Fagot, 1891 (uncertain, unassessed)
Genus Dublonia Clench, 1949 (uncertain, unassessed)
Genus Duboisiana Bourguignat, 1880 (uncertain, unassessed)
Genus Ducya Pezant, 1908 (uncertain, unassessed)
Genus Dudichia Wagner, 1941 (uncertain, unassessed)
Genus Dufouriana Bourguignat, 1884 (uncertain, unassessed)
Genus Dunar Cossmann, 1925 † (uncertain, unassessed)
Genus Dundryites Buckman, 1926 † (uncertain, unassessed)
Genus Dupotetia Kobelt in Rossmaessler, 1904 (uncertain, unassessed)
Genus Dupuyana Fagot, 1891 (uncertain, unassessed)
Genus Durban Weyenbergh, 1875 (uncertain, unassessed)
Genus Durgaites Diener, 1905 (uncertain, unassessed)
Genus Durnovarites Spath, 1932 † (uncertain, unassessed)
Genus Duslia Jahn, 1893 (uncertain, unassessed)
Genus Dvorecia Růžička, 1949 † (uncertain, unassessed)
Genus Dybowskia Dall, 1877 (uncertain, unassessed)
Genus Dybowskiola Lindholm, 1913 (uncertain, unassessed)
Genus Dyodonta Hartmann, 1842 (uncertain, unassessed)
Genus Dysmedoma Pilsbry, 1939 (uncertain, unassessed)
Genus Dysopeas Baker, 1927 (uncertain, unassessed)
Genus Ebena Schumacher, 1817 (uncertain, unassessed)
Genus Ebenomitra Monterosato, 1917 (uncertain, unassessed)
Genus Eburnea Mousson, 1887 (uncertain, unassessed)
Genus Eburnella Pease, 1870 (uncertain, unassessed)
Genus Eccritopoma Pilsbry, 1933 (uncertain, unassessed)
Genus Ecericardium Eberzin, 1947 † (uncertain, unassessed)
Genus Echidnis Montfort, 1808 (uncertain, unassessed)
Genus Echinoceratites Schrammen, 1928 † (uncertain, unassessed)
Genus Echinochiton Pojeta, Eernisse, Hoare & Henderson, 2003 † (uncertain, unassessed)
Genus Echinotus Marwick, 1935 (uncertain, unassessed)
Genus Echion Poli, 1791 (uncertain, unassessed)
Genus Echionoderma Poli, 1795 (uncertain, unassessed)
Genus Echo Hartman, 1881 (uncertain, unassessed)
Genus Ecostoanachis Sacco, 1890 (uncertain, unassessed)
Genus Ectenoptera Ulrich, 1897 † (uncertain, unassessed)
Genus Ectonoceras Ulrich & Foerste, 1935 (uncertain, unassessed)
Genus Ectracheliza Gabb, 1873 (uncertain, unassessed)
Genus Ecuadorea Marshall & Bowles, 1932 † (uncertain, unassessed)
Genus Edentata Dybowski & Grochmalicki, 1923 (uncertain, unassessed)
Genus Edentiplica Iredale, 1939 (uncertain, unassessed)
Genus Edentula Nitzsch in Ersch & Gruber, 1820 (uncertain, unassessed)
Genus Edentulana Fagot, 1891 (uncertain, unassessed)
Genus Edentulopupa Cooke & Pilsbry in Tryon & Pilsbry, 1920 (uncertain, unassessed)
Genus Edgaria Bourguignat, 1888 (uncertain, unassessed)
Genus Eduardia Hesse, 1916 (uncertain, unassessed)
Genus Eduardus Pilsbry, 1930 (uncertain, unassessed)
Genus Edulicardium Monterosato, 1923 (uncertain, unassessed)
Genus Edusa Martens, 1860 (uncertain, unassessed)
Genus Edwardus Pilsbry, 1930 (uncertain, unassessed)
Genus Effusa Jousseaume, 1889 (uncertain, unassessed)
Genus Egana Böttger, 1878 (uncertain, unassessed)
Genus Egetaria Mörch, 1861 (uncertain, unassessed)
Genus Eichwaldiceras Buckman, 1920 † (uncertain, unassessed)
Genus Eichwaldites Dorodnova, 1993 † (uncertain, unassessed)
Genus Eione Rafinesque, 1814 (uncertain, unassessed)
Genus Ekadanta Rao, 1928 (uncertain, unassessed)
Genus Elachista Dall & Bartsch, 1901 (uncertain, unassessed)
Genus Elana Gray, 1868 (uncertain, unassessed)
Genus Elara Adams, 1854 (uncertain, unassessed)
Genus Elasmatina Petit de la Saussaye, 1843 (uncertain, unassessed)
Genus Elasmocentrum Pilsbry, 1902 (uncertain, unassessed)
Genus Elasmodophora Isberg, 1934 (uncertain, unassessed)
Genus Elasmophora Westerlund, 1887 (uncertain, unassessed)
Genus Elathia Issel, 1869 (uncertain, unassessed)
Genus Elea Fitzinger, 1833 (uncertain, unassessed)
Genus Electrea Klebs, 1886 † (uncertain, unassessed)
Genus Eledon Voigt in Cuvier, 1834 (uncertain, unassessed)
Genus Elegantarca Tomlin, 1930 † (uncertain, unassessed)
Genus Elegantuliceras Buckman, 1913 † (uncertain, unassessed)
Genus Elena Caziot, 1910 (uncertain, unassessed)
Genus Elisma Gray in Turton, 1831 (uncertain, unassessed)
Genus Ellarion Iredale, 1941 (uncertain, unassessed)
Genus Ellipsolithes Sowerby, 1813 (uncertain, unassessed)
Genus Ellipsopsiana Bourguignat, 1881 (uncertain, unassessed)
Genus Ellipsopsisiana Locard, 1889 (uncertain, unassessed)
Genus Ellipstoma Rafinesque, 1818 (uncertain, unassessed)
Genus Elongata Westerlund, 1886 † (uncertain, unassessed)
Genus Elongata Stinchcomb & Darrough, 1995 † (uncertain, unassessed)
Genus Elongatulusiana Locard, 1889 (uncertain, unassessed)
Genus Elophilus Labbé, 1936 (uncertain, unassessed)
Genus Elymella Hall, 1885 † (uncertain, unassessed)
Genus Elysiopterus Pruvot-Fol, 1946 (uncertain, unassessed)
Genus Emarginaria Böttger, 1877 † (uncertain, unassessed)
Genus Embiana Locard, 1890 (uncertain, unassessed)
Genus Emericiceras Sarkar, 1954 † (uncertain, unassessed)
Genus Emileites Buckman, 1927 † (uncertain, unassessed)
Genus Emiralena Iredale, 1941 (uncertain, unassessed)
Genus Emmarginula Clessin, 1887 (uncertain, unassessed)
Genus Enanticeramus Heinz, 1932 † (uncertain, unassessed)
Genus Enargetes Fischer de Waldheim, 1830 (uncertain, unassessed)
Genus Enchostoma Miller & Gurley, 1896 † (uncertain, unassessed)
Genus Enclimatoceras Hyatt, 1884 (uncertain, unassessed)
Genus Endocosteahaenleinia Toula, 1912 † (uncertain, unassessed)
Genus Endoplocus Cox, 1954 (uncertain, unassessed)
Genus Endotoma Rafinesque, 1819 (uncertain, unassessed)
Genus Enetoplax Cherns, 1998 † (uncertain, unassessed)
Genus Enkebergia Schindewolf, 1924 † (uncertain, unassessed)
Genus Enneastrum Pfeiffer, 1866 (uncertain, unassessed)
Genus Enneopupa Böttger, 1889 (uncertain, unassessed)
Genus Enoplochitontypus Bergenhayn, 1930 (uncertain, unassessed)
Genus Ensigervilleia Dietrich, 1910 (uncertain, unassessed)
Genus Ensiphorus Conrad, 1862 (uncertain, unassessed)
Genus Ensitheca Valkov, 1982 † (uncertain, unassessed)
Genus Entagaricus Pilsbry, 1919 (uncertain, unassessed)
Genus Entale Herrmannsen, 1847 (uncertain, unassessed)
Genus Entalites Herrmannsen, 1847 (uncertain, unassessed)
Genus Entalium Defrance, 1819 (uncertain, unassessed)
Genus Entomostoma Baker, 1941 (uncertain, unassessed)
Genus Eoasianites Ružencev, 1936 † (uncertain, unassessed)
Genus Eoathleta Gardner, 1945 † (uncertain, unassessed)
Genus Eobulimites Astre, 1923 (uncertain, unassessed)
Genus Eocasmaria Vredenburg, 1928 † (uncertain, unassessed)
Genus Eocautor Eames, 1951 † (uncertain, unassessed)
Genus Eochiton Fischer, 1885 (uncertain, unassessed)
Genus Eocremnoconchus Prashad, 1928 (uncertain, unassessed)
Genus Eocryphispira Yu, 1987 † (uncertain, unassessed)
Genus Eocryptaulina Foerste, 1936 † (uncertain, unassessed)
Genus Eodiplodon Marshall, 1928 (uncertain, unassessed)
Genus Eoepigoniceras Shimizu, 1935 † (uncertain, unassessed)
Genus Eoglyphioceras Brüning, 1923 † (uncertain, unassessed)
Genus Eohalobia Jiang, 1982 † (uncertain, unassessed)
Genus Eolinevitus Qian, Zhu & Jiang, 2000 † (uncertain, unassessed)
Genus Eomeekoceras Sun, 1939 † (uncertain, unassessed)
Genus Eomegaspira Pilsbry in Tryon & Pilsbry, 1904 † (uncertain, unassessed)
Genus Eomiodon Chavan, 1936 † (uncertain, unassessed)
Genus Eonaias Marshall, 1929 † (uncertain, unassessed)
Genus Eoptychites Spath, 1930 † (uncertain, unassessed)
Genus Eorrhachis Tomlin & Peile, 1930 (uncertain, unassessed)
Genus Eosactoceras Shimizu & Obata, 1935 † (uncertain, unassessed)
Genus Eosiphonalia Weaver, 1945 † (uncertain, unassessed)
Genus Eospyroceras Shimizu & Obata, 1935 † (uncertain, unassessed)
Genus Eostrophia Dall, 1890 † (uncertain, unassessed)
Genus Eotibia Clark, 1942 † (uncertain, unassessed)
Genus Epalxites Mascke, 1906 (uncertain, unassessed)
Genus Epammonites Spath, 1922 † (uncertain, unassessed)
Genus Eparciella Cox, 1954 (uncertain, unassessed)
Genus Eparnioceras Spath, 1924 † (uncertain, unassessed)
Genus Epechioceras Trueman & Williams, 1925 (uncertain, unassessed)
Genus Epengonoceras Spath, 1924 † (uncertain, unassessed)
Genus Epiceramus Heinz, 1932 † (uncertain, unassessed)
Genus Epihedenstroemia Spath, 1934 † (uncertain, unassessed)
Genus Epihippopodium Dietrich, 1933 † (uncertain, unassessed)
Genus Epilegoceras Tchernow, 1907 (uncertain, unassessed)
Genus Epipachydiscus Yabe & Shimizu, 1926 (uncertain, unassessed)
Genus Epipronorites Maximova, 1938 † (uncertain, unassessed)
Genus Episcomitra Monterosato, 1917 (uncertain, unassessed)
Genus Episphinctoceras Neaverson, 1925 † (uncertain, unassessed)
Genus Epistylia Swainson, 1840 (uncertain, unassessed)
Genus Epistylium Gray, 1840 (uncertain, unassessed)
Genus Eptoleda Iredale, 1939 (uncertain, unassessed)
Genus Eratodium Korobkov, 1955 † (uncertain, unassessed)
Genus Erctella Monterosato, 1894 (uncertain, unassessed)
Genus Erectidens Pilsbry, 1953 (uncertain, unassessed)
Genus Ereminella Pallary, 1919 (uncertain, unassessed)
Genus Eremiopsis Böttger, 1909 (uncertain, unassessed)
Genus Eremophila Kobelt, 1871 (uncertain, unassessed)
Genus Ericetana Fagot, 1891 (uncertain, unassessed)
Genus Erigone Albers, 1850 (uncertain, unassessed)
Genus Eriphyla Dall, 1879 (uncertain, unassessed)
Genus Erlangericheilus Shimansky, 1947 † (uncertain, unassessed)
Genus Ermea Gray, 1857 (uncertain, unassessed)
Genus Ernstia Jousseaume, 1889 (uncertain, unassessed)
Genus Erpetometra Lowe, 1832 (uncertain, unassessed)
Genus Erpilites Rafinesque, 1819 (uncertain, unassessed)
Genus Erraticana Caziot, 1910 (uncertain, unassessed)
Genus Ersina Gray, 1847 (uncertain, unassessed)
Genus Eruca Swainson, 1840 (uncertain, unassessed)
Genus Eryma Albers, 1854 (uncertain, unassessed)
Genus Erythraea Sowerby, 1839 (uncertain, unassessed)
Genus Escragnolleites Sarkar, 1954 † (uncertain, unassessed)
Genus Esmia Gray, 1847 (uncertain, unassessed)
Genus Esochara Pilsbry & Vanatta, 1898 (uncertain, unassessed)
Genus Espiphylla Rafinesque, 1819 (uncertain, unassessed)
Genus Estopupina Iredale, 1937 (uncertain, unassessed)
Genus Etenoides Bruguière, 1792 (uncertain, unassessed)
Genus Ethella Adams, 1858 (uncertain, unassessed)
Genus Etrona Jousseaume, 1884 (uncertain, unassessed)
Genus Euacanthinula Westerlund, 1889 † (uncertain, unassessed)
Genus Euadnita Iredale, 1941 (uncertain, unassessed)
Genus Euaethiopica Bequaert, 1951 (uncertain, unassessed)
Genus Euaethiops Clench & Archer, 1930 (uncertain, unassessed)
Genus Eualcadia Wagner in Martini & Chemnitz, 1907 (uncertain, unassessed)
Genus Eualopia Westerlund, 1884 (uncertain, unassessed)
Genus Eualopia Böttger, 1877 † (uncertain, unassessed)
Genus Euamicola Crosse & Fischer, 1891 (uncertain, unassessed)
Genus Euanana Baker, 1938 (uncertain, unassessed)
Genus Euanodonta Westerlund, 1890 (uncertain, unassessed)
Genus Euarinia Kobelt & Möllendorff, 1898 (uncertain, unassessed)
Genus Euassiminea Martens, 1883 (uncertain, unassessed)
Genus Eubaicalia Lindholm, 1924 (uncertain, unassessed)
Genus Eubifidaria Sterki, 1893 (uncertain, unassessed)
Genus Eucampylaea Westerlund, 1889 † (uncertain, unassessed)
Genus Eucampylaea Pfeiffer, 1879 (uncertain, unassessed)
Genus Eucaryum Ehrenberg, 1831 (uncertain, unassessed)
Genus Eucathaica Andreae, 1900 (uncertain, unassessed)
Genus Euclasta Martens, 1877 (uncertain, unassessed)
Genus Euclastaria Pilsbry, 1926 (uncertain, unassessed)
Genus Euclausta Oppenheim, 1890 (uncertain, unassessed)
Genus Euclista Böttger, 1878 (uncertain, unassessed)
Genus Euclusaea Gray, 1852 (uncertain, unassessed)
Genus Eucochlias Nevill, 1878 (uncertain, unassessed)
Genus Euconulops Baker, 1928 (uncertain, unassessed)
Genus Eucorbicula Crosse & Fischer, 1894 (uncertain, unassessed)
Genus Eucore Agassiz in Charpentier, 1837 (uncertain, unassessed)
Genus Eucryptelasmus Jaume & de Fuentes, 1943 (uncertain, unassessed)
Genus Eucyclophorus Möllendorff, 1886 (uncertain, unassessed)
Genus Eucyclotus Möllendorff, 1890 (uncertain, unassessed)
Genus Eudaudebardia Westerlund, 1886 (uncertain, unassessed)
Genus Eudiancta Kobelt & Möllendorff, 1898 (uncertain, unassessed)
Genus Eudiplommatina Kobelt & Möllendorff, 1898 (uncertain, unassessed)
Genus Eudissoceras Miller & Owen, 1937 † (uncertain, unassessed)
Genus Eudistemma Dall, 1895 (uncertain, unassessed)
Genus Eudoxus Albers, 1850 (uncertain, unassessed)
Genus Euechioceras Trueman & Williams, 1925 (uncertain, unassessed)
Genus Euferussacia Bourguignat, 1864 (uncertain, unassessed)
Genus Eufira Gistl, 1847 (uncertain, unassessed)
Genus Eufretum Baker, 1941 (uncertain, unassessed)
Genus Eugenia Martens, 1860 (uncertain, unassessed)
Genus Eugenoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Eugeomalacus Mabille, 1870 (uncertain, unassessed)
Genus Euglesia Jenyns, 1832 (uncertain, unassessed)
Genus Euglypta Charpentier, 1837 (uncertain, unassessed)
Genus Euhuronia Shimizu & Obata, 1936 † (uncertain, unassessed)
Genus Euhyalina Reinhardt, 1883 (uncertain, unassessed)
Genus Euhyalina Albers, 1857 (uncertain, unassessed)
Genus Euhyphantoceras Shimizu, 1935 (uncertain, unassessed)
Genus Euiberus Westerlund, 1889 (uncertain, unassessed)
Genus Eukteanochiton Vendrasco & Runnegar, 2004 † (uncertain, unassessed)
Genus Eulimax Moquin-Tandon, 1855 (uncertain, unassessed)
Genus Eulimopsis Brugnone, 1880 (uncertain, unassessed)
Genus Eulotella Martens in Weber, 1892 (uncertain, unassessed)
Genus Eumegalodon Gümbel, 1862 (uncertain, unassessed)
Genus Eumelus Rafinesque, 1820 (uncertain, unassessed)
Genus Eumilax Böttger, 1881 (uncertain, unassessed)
Genus Eumorphiana Bourguignat, 1884 (uncertain, unassessed)
Genus Eumulleria Anthony, 1907 (uncertain, unassessed)
Genus Euneritella Wagner, 1905 (uncertain, unassessed)
Genus Euophioceras Miller, 1932 (uncertain, unassessed)
Genus Euopisthostoma Kobelt & Möllendorff, 1898 (uncertain, unassessed)
Genus Euostrea Douvillé, 1920 † (uncertain, unassessed)
Genus Eupalaina Kobelt & Möllendorff, 1898 (uncertain, unassessed)
Genus Eupaludestrina Mabille, 1877 (uncertain, unassessed)
Genus Euparmacella Simroth, 1912 (uncertain, unassessed)
Genus Euparyphia Hartmann, 1840 (uncertain, unassessed)
Genus Eupecten Philippi, 1900 † (uncertain, unassessed)
Genus Euphemia Leach in Beck, 1847 (uncertain, unassessed)
Genus Euphyllites Wähner, 1898 † (uncertain, unassessed)
Genus Euphyoceramus Heinz, 1932 † (uncertain, unassessed)
Genus Eupisidium Odhner, 1921 (uncertain, unassessed)
Genus Eupomatias Wagner, 1897 (uncertain, unassessed)
Genus Eupsadara Pilsbry, 1926 (uncertain, unassessed)
Genus Eupterotrachea Bonnevie, 1920 (uncertain, unassessed)
Genus Eupupina Pfeiffer, 1876 (uncertain, unassessed)
Genus Euradiolites Wiontzek, 1934 † (uncertain, unassessed)
Genus Eurasiaticoceras Shimizu & Obata, 1935 † (uncertain, unassessed)
Genus Eurastele Coen, 1946 (uncertain, unassessed)
Genus Eurhytida Möllendorff in Martini & Chemnitz, 1903 (uncertain, unassessed)
Genus Euromus Adams, 1858 (uncertain, unassessed)
Genus Euryanodon Crosse & Fischer, 1894 (uncertain, unassessed)
Genus Eurybasis Gude, 1913 (uncertain, unassessed)
Genus Euryceramus Heinz, 1932 † (uncertain, unassessed)
Genus Eurychasma Cossmann, 1915 (uncertain, unassessed)
Genus Eurycyclus Schindewolf, 1951 † (uncertain, unassessed)
Genus Eurydice Eschscholtz, 1825 (uncertain, unassessed)
Genus Euryops Tesch, 1906 (uncertain, unassessed)
Genus Eurypteryx Fischer, 1925 (uncertain, unassessed)
Genus Euryptyxis Fischer, 1883 (uncertain, unassessed)
Genus Eurystoma Albers, 1850 (uncertain, unassessed)
Genus Eurystrophe Gude, 1911 (uncertain, unassessed)
Genus Eurytes Rafinesque, 1832 (uncertain, unassessed)
Genus Eurytropis Kobelt & Möllendorff, 1898 (uncertain, unassessed)
Genus Eurytus Albers, 1850 (uncertain, unassessed)
Genus Eusebia Maury, 1930 † (uncertain, unassessed)
Genus Eusepiola Grimpe, 1922 (uncertain, unassessed)
Genus Euspira Dall, 1908 (uncertain, unassessed)
Genus Eustreptostele Germain, 1915 (uncertain, unassessed)
Genus Eustreptostyla Baker, 1927 (uncertain, unassessed)
Genus Eustropha Charpentier, 1837 (uncertain, unassessed)
Genus Eutaxis Ancey, 1888 (uncertain, unassessed)
Genus Eutomopeas Pilsbry, 1946 (uncertain, unassessed)
Genus Eutragus Charpentier, 1837 (uncertain, unassessed)
Genus Eutrema Rafinesque, 1819 (uncertain, unassessed)
Genus Eutrephamana Caziot, 1910 (uncertain, unassessed)
Genus Eutriloba Westerlund, 1884 (uncertain, unassessed)
Genus Eutriptychia Böttger, 1877 † (uncertain, unassessed)
Genus Eutropidophora Kobelt & Möllendorff, 1898 (uncertain, unassessed)
Genus Eutudorella Henderson & Bartsch, 1920 (uncertain, unassessed)
Genus Eutudorisca Henderson & Bartsch, 1920 (uncertain, unassessed)
Genus Euvaricella Baker, 1935 (uncertain, unassessed)
Genus Euvirgatites Lewinski, 1923 † (uncertain, unassessed)
Genus Euxinicardium Eberzin, 1947 † (uncertain, unassessed)
Genus Evenus Paetel, 1875 (uncertain, unassessed)
Genus Exachorda Sacco, 1904 (uncertain, unassessed)
Genus Exalloschema Hoare, Mapes & Yancey, 2002 † (uncertain, unassessed)
Genus Exaplex Férussac, 1820 (uncertain, unassessed)
Genus Exbalea Jousseaume, 1900 (uncertain, unassessed)
Genus Excavata Wagner, 1907 (uncertain, unassessed)
Genus Excisa Ailly, 1896 (uncertain, unassessed)
Genus Excussispira Lindholm, 1925 (uncertain, unassessed)
Genus Exechoptychia Cossmann, 1903 † (uncertain, unassessed)
Genus Exogyroceras Meek & Worthen, 1868 † (uncertain, unassessed)
Genus Exomegoceras Miller & Carrier, 1942 † (uncertain, unassessed)
Genus Explanatiana Caziot, 1910 (uncertain, unassessed)
Genus Expleritoma Aldrich, 1886 † (uncertain, unassessed)
Genus Exsuavitas Baker, 1939 (uncertain, unassessed)
Genus Extranodites Jeannet, 1951 † (uncertain, unassessed)
Genus Exydra Menke, 1848 (uncertain, unassessed)
Genus Eydyusiana Locard, 1889 (uncertain, unassessed)
Genus Eyryomphala Beck, 1837 (uncertain, unassessed)
Genus Fabricium Chiaje, 1844 (uncertain, unassessed)
Genus Facorhina Baker, 1938 (uncertain, unassessed)
Genus Fadyenia Chitty, 1857 (uncertain, unassessed)
Genus Fagotiana Bourguignat, 1884 (uncertain, unassessed)
Genus Falcilituites Remelé, 1886 † (uncertain, unassessed)
Genus Fallaciturris Tomlin, 1929 † (uncertain, unassessed)
Genus Falloonella Preston, 1914 (uncertain, unassessed)
Genus Falsoglessula Dupuis & Putzeys, 1924 (uncertain, unassessed)
Genus Falsopupa Germain, 1918 (uncertain, unassessed)
Genus Falsusiana Locard, 1889 (uncertain, unassessed)
Genus Fannettia Dall, 1882 (uncertain, unassessed)
Genus Fannyia Gray, 1857 (uncertain, unassessed)
Genus Fantema Iredale, 1941 (uncertain, unassessed)
Genus Fargesia Heude, 1886 (uncertain, unassessed)
Genus Farinesiana Fagot, 1891 (uncertain, unassessed)
Genus Fasciatiana Bourguignat, 1880 (uncertain, unassessed)
Genus Fascinella Sandberger, 1872 (uncertain, unassessed)
Genus Fasciolina Conrad, 1867 (uncertain, unassessed)
Genus Fastigiceras Buckman, 1919 † (uncertain, unassessed)
Genus Fatuoa Baker, 1938 (uncertain, unassessed)
Genus Faudelia Hagenmüller, 1885 (uncertain, unassessed)
Genus Faunopsis Gill, 1863 (uncertain, unassessed)
Genus Faurotis Jousseaume, 1888 (uncertain, unassessed)
Genus Fauxulella Pilsbry, 1917 (uncertain, unassessed)
Genus Faxia Ravn, 1933 (uncertain, unassessed)
Genus Felipes Carus, 1889 (uncertain, unassessed)
Genus Fengshanites Chao, 1950 † (uncertain, unassessed)
Genus Ferganoconcha Tschernyschev, 1938 † (uncertain, unassessed)
Genus Ferrazia Reed, 1932 (uncertain, unassessed)
Genus Ferrazia Cowper Reid, 1943 † (uncertain, unassessed)
Genus Ferreta Röder, 1882 (uncertain, unassessed)
Genus Festiva Wagner, 1910 (uncertain, unassessed)
Genus Fibricutis Pilsbry in Tryon & Pilsbry, 1903 (uncertain, unassessed)
Genus Fictiscala Cossmann, 1922 (uncertain, unassessed)
Genus Fijia Gude, 1913 (uncertain, unassessed)
Genus Fijiopoma Clench, 1949 (uncertain, unassessed)
Genus Filicaulis Simroth in Voeltzkow, 1913 (uncertain, unassessed)
Genus Filocyclus Bartsch & Morrison, 1942 (uncertain, unassessed)
Genus Filumna Böttger, 1878 (uncertain, unassessed)
Genus Filurus De Kay, 1843 (uncertain, unassessed)
Genus Fimbria Bohadsch, 1761 (uncertain, unassessed)
Genus Fimbrilytoceras Buckman, 1918 † (uncertain, unassessed)
Genus Fistula Mörch, 1853 (uncertain, unassessed)
Genus Fitzia Guppy, 1895 (uncertain, unassessed)
Genus Flabellina Forbes & Hanley, 1851 (uncertain, unassessed)
Genus Flabelloides Deshayes, 1864 (uncertain, unassessed)
Genus Flabellulum Bellardi, 1872 (uncertain, unassessed)
Genus Flagellicaulis Simroth in Voeltzkow, 1913 (