Between brackets is the number of accepted species

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- Mollusca (132 754)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (24 992)
- Class Caudofoveata (143)
- Class Cephalopoda (1 832)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 679)
- Subclass Amphigastropoda † (387)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 623)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 917)
- Order Caenogastropoda incertae sedis (7 675)
- Order Littorinimorpha (17 171)
- Superfamily Calyptraeoidea Lamarck, 1809 (203)
- Superfamily Capuloidea J. Fleming, 1822 (218)
- Superfamily Cassoidea accepted as Tonnoidea Suter, 1913 (1825)
- Superfamily Cingulopsoidea Fretter & Patil, 1958 (193)
- Superfamily Crepiduloidea J. Fleming, 1822 accepted as Calyptraeoidea Lamarck, 1809
- Superfamily Cypraeoidea Rafinesque, 1815 (1 279)
- Superfamily Eulimoidea R. A. Philippi, 1853 accepted as Vanikoroidea Gray, 1840
- Superfamily Ficoidea Meek, 1864 (1840) (71)
- Superfamily Heteropoda Lamarck, 1812 accepted as Pterotracheoidea Rafinesque, 1814
- Superfamily Hipponicoidea Troschel, 1861 (99)
- Superfamily Littorinoidea Children, 1834 (1 372)
- Superfamily Naticoidea Guilding, 1834 (688)
- Superfamily Pterotracheoidea Rafinesque, 1814 (63)
- Superfamily Rissoacea accepted as Rissooidea Gray, 1847
- Superfamily Rissoinoidea W. Stimpson, 1865 accepted as Rissooidea Gray, 1847
- Superfamily Rissooidea Gray, 1847 (2 309)
- Superfamily Stromboidea Rafinesque, 1815 (835)
- Superfamily Tonnoidea Suter, 1913 (1825) (788)
- Superfamily Truncatelloidea J. E. Gray, 1840 (6 902)
- Superfamily Vanikoroidea Gray, 1840 (1 331)
- Superfamily Velutinoidea Gray, 1840 (648)
- Family Coriocellidae Troschel, 1848 accepted as Lamellariinae A. d'Orbigny, 1841
- Family Eratoidae Gill, 1871 (160)
- Subfamily Eratoinae Gill, 1871 accepted as Eratoidae Gill, 1871
- Tribe Eratotriviini Schilder, 1936 † accepted as Eratoidae Gill, 1871
- Tribe Johnstrupiini Schilder, 1939 † accepted as Eratoidae Gill, 1871
- Genus Alaerato C. N. Cate, 1977 (15)
- Genus Archierato F. A. Schilder, 1933 (21)
- Genus Bellerato P. A. Maxwell, 1992 † (4)
- Genus Caribeginella Espinosa & Ortea, 1998 (1)
- Genus Cypraeerato F. A. Schilder, 1933 (10)
- Genus Erato Risso, 1826 (50)
- Genus Eratoena Iredale, 1935 (15)
- Genus Eratopsis R. Hoernes, 1880 (3)
- Genus Eratotrivia Sacco, 1894 † (4)
- Genus Hespererato Schilder, 1933 (11)
- Species Hespererato ampulla (Deshayes, 1835) †
- Species Hespererato canae Groves & Landau, 2021 †
- Species Hespererato chipolana (Maury, 1910) †
- Species Hespererato cocconii F. A. Schilder, 1933 † accepted as Erato uniplicata Depontaillier, 1881 †
- Species Hespererato columbella (Menke, 1847) accepted as Archierato columbella (Menke, 1847)
- Species Hespererato domingensis (Maury, 1917) †
- Species Hespererato emmonsi (Whitfield, 1894) †
- Species Hespererato galapagensis F. Schilder, 1933 accepted as Archierato galapagensis (F. A. Schilder, 1933)
- Species Hespererato marginata (Mörch, 1860) accepted as Archierato columbella (Menke, 1847)
- Species Hespererato marqueti Fehse & Landau, 2002 †
- Species Hespererato martinicensis Schilder, 1933 accepted as Archierato martinicensis (F. A. Schilder, 1933)
- Species Hespererato maugeriae (J. E. Gray, 1832) accepted as Archierato maugeriae (J. E. Gray, 1832)
- Species Hespererato nanhaiensis X.-T. Ma, 1994
- Species Hespererato pallida Oleinik, Petuch & Aley, 2012 accepted as Eratoidea watsoni (Dall, 1881)
- Species Hespererato praeclusa Groves & Landau, 2021 †
- Species Hespererato rehderi (Raines, 2002) accepted as Sulcerato rehderi (Raines, 2002)
- Species Hespererato rubra Fehse, 2016
- Species Hespererato scabriuscula (J. E. Gray, 1832)
- Species Hespererato septentrionalis C. N. Cate, 1977 accepted as Eratoena septentrionalis (C. N. Cate, 1977)
- Species Hespererato vitellina (Hinds, 1844)
- Species Hespererato zevitellina Laws, 1941 † accepted as Bellerato zevitellina (Laws, 1941) †
- Genus Lachryma J. E. Gray, 1832 (1)
- Genus Notoficula Thiele, 1917 (3)
- Genus Praealaerato Fehse, 2018 † (3)
- Genus Proerato [sic] accepted as Proterato F. A. Schilder, 1927
- Genus Proterato F. A. Schilder, 1927 (11)
- Genus Sulcerato H. J. Finlay, 1930 (8)
- Family Lamellariidae A. d'Orbigny, 1841 accepted as Lamellariinae A. d'Orbigny, 1841
- Family Marseniidae Leach, 1847 accepted as Lamellariinae A. d'Orbigny, 1841
- Family Marseniopsidae Bandel, 1993 accepted as Marseniopsinae Fassio, Bouchet, Schiaparelli & Oliverio, 2022
- Family Sacculidae Thiele, 1929 accepted as Velutininae Gray, 1840
- Family Triviidae Troschel, 1863 (379)
- Family Velutinidae Gray, 1840 (109)
- Superfamily Vermetoidea Rafinesque, 1815 (172)
- Superfamily Xenophoroidea Troschel, 1852 (1840) accepted as Stromboidea Rafinesque, 1815
- Order Neogastropoda (23 713)
- Order Stenoglossa accepted as Neogastropoda
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 154)
- 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 (6 782)
- 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