Between brackets is the number of accepted species

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- Mollusca (132 888)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 022)
- Class Caudofoveata (143)
- Class Cephalopoda (1 838)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 777)
- Subclass Amphigastropoda † (396)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 684)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 919)
- Order Caenogastropoda incertae sedis (7 677)
- Order Littorinimorpha (17 189)
- Order Neogastropoda (23 752)
- Superfamily Buccinoidea Rafinesque, 1815 (5 255)
- Superfamily Cancellarioidea Forbes & Hanley, 1851 accepted as Volutoidea Rafinesque, 1815
- Superfamily Conoidea J. Fleming, 1822 (8 696)
- Superfamily Mitroidea Swainson, 1831 (633)
- Superfamily Muricacea accepted as Muricoidea Rafinesque, 1815
- Superfamily Muricoidea Rafinesque, 1815 (2 941)
- Superfamily Neogastropoda incertae sedis (296)
- Superfamily Olivoidea Latreille, 1825 (740)
- Superfamily Pholidotomoidea Cossmann, 1896 † (56)
- Superfamily Pseudolivoidea De Gregorio, 1880 accepted as Olivoidea Latreille, 1825
- Superfamily Pyrifusoidea Bandel & Dockery, 2001 † accepted as Pholidotomoidea Cossmann, 1896 †
- Superfamily Sarganoidea Stephenson, 1923 † accepted as Pholidotomoidea Cossmann, 1896 †
- Superfamily Toxoglossa Troschel, 1848 accepted as Conoidea J. Fleming, 1822
- Superfamily Turbinelloidea Swainson, 1835 (1 253)
- Superfamily Volutoidea Rafinesque, 1815 (3 882)
- Family Cancellariidae Forbes & Hanley, 1851 (855)
- Family Cystiscidae W. Stimpson, 1865 (556)
- Family Granulinidae G. A. Coovert & H. K. Coovert, 1995 (155)
- Family Marginellidae J. Fleming, 1828 (1 445)
- Family Marginellonidae Coan, 1965 (4)
- Family Paladmetidae Stephenson, 1941 † accepted as Admetinae Troschel, 1865
- Family Plesiocystiscidae G. A. Coovert & H. K. Coovert, 1995 accepted as Plesiocystiscinae G. A. Coovert & H. K. Coovert, 1995
- Family Volutidae Rafinesque, 1815 (867)
- Subfamily Amoriinae J. E. Gray, 1857 (170)
- Tribe Amoriini J. E. Gray, 1857 (75)
- Genus Amorena Iredale, 1929 accepted as Amoria J. E. Gray, 1855
- Genus Amoria J. E. Gray, 1855 (36)
- Subgenus Amoria (Amorena) Iredale, 1929 accepted as Amorena Iredale, 1929
- Subgenus Amoria (Amoria) J. E. Gray, 1855 represented as Amoria J. E. Gray, 1855
- Subgenus Amoria (Cymbiolista) Iredale, 1929 represented as Amoria J. E. Gray, 1855
- Subgenus Amoria (Zebramoria) Iredale, 1929 accepted as Amoria J. E. Gray, 1855
- Species Amoria austellus H. Morrison & B. Schneider, 2021
- Species Amoria benthalis McMichael, 1964
- Species Amoria canaliculata (F. McCoy, 1869)
- Species Amoria chaneyi H. Morrison, 2012
- Species Amoria costellifera (Tate, 1889) †
- Species Amoria damonii J. E. Gray, 1864
- Subspecies Amoria damonii damonii J. E. Gray, 1864
- Subspecies Amoria damonii ludbrookae Bail & Limpus, 1996
- Subspecies Amoria damonii reevii (G. B. Sowerby II, 1864)
- Species Amoria dampieria C. S. Weaver, 1960
- Species Amoria diamantina B. R. Wilson, 1972
- Species Amoria ellioti (G. B. Sowerby II, 1864)
- Species Amoria exoptanda (Reeve, 1849)
- Species Amoria grayi Ludbrook, 1953
- Species Amoria grossi Iredale, 1927 accepted as Volutoconus grossi (Iredale, 1927)
- Species Amoria guttata McMichael, 1964
- Species Amoria hansenae H. Morrison, 2012
- Species Amoria hunteri (Iredale, 1931)
- Species Amoria jamrachii J. E. Gray, 1864
- Species Amoria jansae van Pel & Moolenbeek, 2010
- Species Amoria kingi (J. C. Cox, 1871) accepted as Amoria undulata (Lamarck, 1804)
- Species Amoria lineola Bail & Limpus, 2009
- Species Amoria macandrewi (G. B. Sowerby III, 1887)
- Species Amoria maculata (Swainson, 1822)
- Species Amoria marshallorum H. Morrison & B. Schneider, 2021
- Species Amoria masoni (Tate, 1889) †
- Species Amoria mihali H. Morrison, 2018
- Species Amoria molleri (Iredale, 1936) accepted as Relegamoria molleri Iredale, 1936
- Species Amoria necopinata Darragh, 1983
- Species Amoria newmanae Cotton, 1949 accepted as Amoria turneri (J. E. Gray, 1834)
- Species Amoria peterstimpsoni T. Cossignani & Allary, 2019
- Species Amoria praetexta (Reeve, 1849)
- Species Amoria rinkensi Poppe, 1986
- Species Amoria ryosukei T. Habe, 1975
- Species Amoria simoneae Bail & Limpus, 2003
- Species Amoria spenceriana (Gatliff, 1908)
- Species Amoria stricklandi Bail & Limpus, 2016
- Species Amoria subfossilis Bail & Limpus, 2011
- Species Amoria thorae J. M. Healy, 2020
- Species Amoria turneri (J. E. Gray, 1834)
- Species Amoria undulata (Lamarck, 1804)
- Species Amoria weldensis Bail & Limpus, 2001
- Species Amoria zebra (Leach, 1814)
- Genus Canamoria Bondarev, 1995 accepted as Amoria J. E. Gray, 1855
- Genus Cymbiolista Iredale, 1929 accepted as Amoria (Cymbiolista) Iredale, 1929
- Genus Nannamoria Iredale, 1929 (23)
- Genus Paramoria McMichael, 1960 (4)
- Genus Relegamoria Iredale, 1936 (12)
- Genus Zebramoria Iredale, 1929 accepted as Amoria J. E. Gray, 1855
- Tribe Melonini Pilsbry & Olsson, 1954 (63)
- Tribe Notovolutini Bail & Poppe, 2001 (32)
- Subfamily Athletinae Pilsbry & Olsson, 1954 (105)
- Subfamily Calliotectinae Pilsbry & Olsson, 1954 (22)
- Subfamily Cymbiinae H. Adams & A. Adams, 1853 (1847) (236)
- Subfamily Cymbiolinae Bondarev, 1995 accepted as Melonini Pilsbry & Olsson, 1954
- Subfamily Eovolutinae Pacaud, 2016 † (25)
- Subfamily Fulgorariinae Pilsbry & Olsson, 1954 (57)
- Subfamily Indovolutinae Halder & S. S. Das, 2019 † (11)
- Subfamily Plicolivinae Bouchet, 1990 (2)
- Subfamily Scaphellinae Gray, 1857 (64)
- Subfamily Volutilithinae Pilsbry & Olsson, 1954 † (21)
- Subfamily Volutinae Rafinesque, 1815 (154)
- Subfamily Volutomitrinae J. E. Gray, 1854 accepted as Volutomitridae J. E. Gray, 1854
- Subfamily Zidoninae H. Adams & A. Adams, 1853 accepted as Zidonini H. Adams & A. Adams, 1853
- Genus Rostellites Conrad, 1855 †
- Genus Tectaplica Wade, 1916 †
- Order Stenoglossa accepted as Neogastropoda
- Subclass Gastropoda incertae sedis (309)
- Subclass Heterobranchia (39 180)
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Neritimorpha (1 914)
- Subclass Orthogastropoda represented as Gastropoda
- Subclass Patellogastropoda (511)
- Subclass Prosobranchia
- Subclass Psilogastropoda represented as Gastropoda
- Subclass Vetigastropoda (6 783)
- 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 (1 377)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Rostroconchia † (64)
- Class Scaphopoda (752)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata