Between brackets is the number of accepted species
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Shows the number of accepted species within the taxon
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- Mollusca (133 259)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 079)
- Class Caudofoveata (143)
- Class Cephalopoda (1 917)
- Subclass Coleoidea (1 150)
- Subclass Endoceratia † (34)
- Subclass Multiceratia † (307)
- Subclass Nautiloida (171)
- Order Actinocerida † accepted as Actinoceratida †
- Order Ellesmerocerida † accepted as Ellesmeroceratida †
- Order Intejocerida † (1)
- Order Mixosiphonata † (1)
- Order Nautilida (168)
- Superfamily Aipoceratoidea Hyatt, 1883 † (3)
- Superfamily Aturioidea Hyatt, 1894 † (9)
- Superfamily Clydonautiloidea Hyatt, 1900 † (3)
- Superfamily Nautiloidea Blainville, 1825 (96)
- Superfamily Tainoceratoidea Hyatt, 1883 † (7)
- Superfamily Trigonoceratoidea Kummel, 1964 † (49)
- Family Centroceratidae Hyatt, 1900 †
- Family Grypoceratidae Hyatt, 1900 † (9)
- Family Trigonoceratidae Hyatt, 1884 † (40)
- Genus Aphelaeceras Hyatt, 1884 † (1)
- Genus Chouteauoceras A. K. Miller & H. Garner, 1953 † (1)
- Genus Echigoceras Niko, 2002 † (1)
- Genus Endolobus Meek & Worthen, 1865 † (1)
- Genus Epistroboceras J. S. Turner, 1954 † (1)
- Genus Imonautilus Niko & Mapes, 2007 † (1)
- Genus Lispoceras Hyatt, 1893 † (1)
- Genus Maccoyoceras Miller, Dunbar & Condra, 1933 † (5)
- Genus Pararineceras Turner, 1954 † accepted as Rineceras Hyatt, 1893 †
- Genus Planetoceras Hyatt, 1893 † (2)
- Genus Rineceras Hyatt, 1893 † (8)
- Genus Stroboceras Hyatt, 1884 † (4)
- Genus Stroborineceras Korn & Bockwinkel, 2022 † (2)
- Genus Temnocheilus F. McCoy, 1844 † (2)
- Genus Thrincoceras Hyatt, 1893 † (1)
- Genus Triboloceras Hyatt, 1884 †
- Genus Trigonoceras M'Coy, 1844 †
- Genus Trilobitoceras Korn & Bockwinkel, 2022 † (1)
- Genus Vestinautilus Ryckholt, 1852 † (8)
- Species Vestinautilus altidorsalis (Winchell, 1862) †
- Species Vestinautilus angulatus Korn & Bockwinkel, 2022 †
- Species Vestinautilus biangulatus (J. de C. Sowerby, 1825) †
- Species Vestinautilus bicristatus Korn & Bockwinkel, 2022 †
- Species Vestinautilus cariniferus (J. de C. Sowerby, 1825) †
- Variety Vestinautilus cariniferus var. magnicameratus Foord, 1900 †
- Species Vestinautilus concinnus Korn, L. Miao & Bockwinkel, 2022 †
- Species Vestinautilus crassimarginatus Foord, 1900 †
- Species Vestinautilus crateriformis Foord, 1900 †
- Species Vestinautilus inflexus Korn & Bockwinkel, 2022 †
- Species Vestinautilus kesslerae Korn & Klug, 2023 †
- Species Vestinautilus koninckii (d'Orbigny, 1847) †
- Species Vestinautilus multicarinatus (J. de C. Sowerby, 1825) †
- Species Vestinautilus padus Korn, L. Miao & Bockwinkel, 2022 †
- Species Vestinautilus papilio Korn & Bockwinkel, 2022 †
- Species Vestinautilus pinguis (de Koninck, 1844) †
- Species Vestinautilus semiglaber Foord, 1900 †
- Species Vestinautilus semiplicatus Foord, 1900 †
- Family Nautilida incertae sedis † (1)
- Order Nautiloida incertae sedis † (1)
- Order Oncocerida † accepted as Oncoceratida †
- Order Orthocerida † accepted as Orthoceratida †
- Subclass Orthoceratia † (212)
- Subclass Plectronoceratia † (16)
- Subclass Tarphyceratia † (27)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (103 007)
- Class Lamellibranchiata accepted as Bivalvia
- Class Loricata accepted as Polyplacophora
- Class Mollusca incertae sedis † (372)
- Class Monoplacophora (229)
- Class Pelecypoda accepted as Bivalvia
- Class Polyplacophora (1 381)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Rostroconchia † (64)
- Class Scaphopoda (753)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata
