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)
- 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 (1 294)
- 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 (2 312)
- Family Anabathroninae Coan, 1964 accepted as Anabathridae Keen, 1971
- Family Ansolidae Slavoshevskaya, 1975 accepted as Barleeiidae J. E. Gray, 1857
- Family Barleeidae [sic] accepted as Barleeiidae J. E. Gray, 1857
- Family Barleeiidae J. E. Gray, 1857 (105)
- Family Emblandidae Ponder, 1985 (1)
- Family Falsobuvignidae Gründel, Keupp & F. Lang, 2019 † (1)
- Family Lironobidae Ponder, 1967 (67)
- Family Merelinidae A. N. Golikov & Starobogatov, 1975 accepted as Lironobidae Ponder, 1967
- Family Onobidae A. N. Golikov & Starobogatov, 1975 accepted as Rissoidae J. E. Gray, 1847
- Family Palaeorissoinidae Gründel & Kowalke, 2002 † (26)
- Family Rissoidae J. E. Gray, 1847 (1 351)
- Family Rissoidea accepted as Rissooidea Gray, 1847
- Family Rissoinidae W. Stimpson, 1865 (529)
- Subfamily Phosinellinae Coan, 1964 accepted as Rissoinidae W. Stimpson, 1865
- Genus Ailinzebina Ladd, 1966 (11)
- Genus Anteglosia H. E. Vokes, 1948 † (2)
- Genus Apataxia Laseron, 1956 (2)
- Genus Apataxis accepted as Apataxia Laseron, 1956
- Genus Austrosina Laseron, 1956 accepted as Rissoina A. d'Orbigny, 1841
- Genus Bralitzia Gründel, 1998 † (12)
- Genus Caporista Iredale, 1955 accepted as Rissoina A. d'Orbigny, 1841
- Genus Chiliostigma Melvill, 1918 (3)
- Species Chiliostigma obsoleta (M. Hörnes, 1856) †
- Species Chiliostigma refugium (Melvill, 1918)
- Species Chiliostigma tumida Faber & Moolenbeek, 2014
- Genus Condylicia Laseron, 1956 accepted as Rissoina A. d'Orbigny, 1841
- Genus Costalynia Laseron, 1956 accepted as Rissoina (Rissolina) Gould, 1861
- Genus Dentirissoina accepted as Dentrissoina Laseron, 1956
- Genus Fractoralla Laseron, 1956 accepted as Rissoina (Rissolina) Gould, 1861
- Genus Hudlestonella [sic] † accepted as Hudlestoniella Cossmann, 1909 †
- Genus Hudlestonia Cossman, 1893 † accepted as Hudlestoniella Cossmann, 1909 †
- Genus Hudlestoniella Cossmann, 1909 † (6)
- Genus Lamellirissoina Kuroda & Habe, 1991 (1)
- Genus Laseronia Cotton, 1959 accepted as Rissoina A. d'Orbigny, 1841
- Genus Lasseronia Cotton, 1959 accepted as Laseronia Cotton, 1959
- Genus Leaella Cossmann, 1921 †
- Genus Moerchiella G. Nevill, 1885 (13)
- Genus Monostigma Arango, 1880 accepted as Zebinella Mörch, 1876
- Genus Ottoina G. D. Harris & K. van W. Palmer, 1947 † (1)
- Genus Pachyrissoina O. Boettger, 1893 accepted as Rissoina (Pachyrissoina) O. Boettger, 1893
- Genus Parazebinella O. Boettger, 1893 accepted as Rissoa (Rissoina) A. d'Orbigny, 1841
- Genus Peripetella Laseron, 1956 accepted as Rissoina A. d'Orbigny, 1841
- Genus Phintorene Iredale, 1955 accepted as Phosinella Mörch, 1876
- Genus Phosinella Mörch, 1876 (49)
- Genus Planapexia Laseron, 1956 accepted as Phosinella Mörch, 1876
- Genus Pleneconea Laseron, 1956 accepted as Zebinella Mörch, 1876
- Genus Rissocerithium M. A. Conti & J. C. Fischer, 1981 † (1)
- Genus Rissoina A. d'Orbigny, 1841 (368)
- Genus Rissoinia accepted as Rissoina A. d'Orbigny, 1841
- Genus Rissolina Gould, 1861 accepted as Rissoina (Rissolina) Gould, 1861 (1)
- Genus Stiva Hedley, 1904 accepted as Rissoina A. d'Orbigny, 1841
- Genus Sulcorissoina Kosuge, 1965 (2)
- Genus Zebinella Mörch, 1876 (55)
- Genus Zebinostoma M. A. Conti & J.-C. Fischer, 1982 † (2)
- Genus Zymalata Laseron, 1956 accepted as Zebinella Mörch, 1876
- Family Rissolinidae Voorwinde, 1966 accepted as Rissoinidae W. Stimpson, 1865
- Family Zebinidae Coan, 1964 (232)
- 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)
- Superfamily Vermetoidea Rafinesque, 1815 (172)
- Superfamily Xenophoroidea Troschel, 1852 (1840) accepted as Stromboidea Rafinesque, 1815
- Order Neogastropoda (23 752)
- 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