Between brackets is the number of accepted species

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- Mollusca (133 273)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 082)
- Class Caudofoveata (143)
- Class Cephalopoda (1 917)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (103 018)
- Subclass Amphigastropoda † (434)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 827)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 921)
- Order Caenogastropoda incertae sedis (7 701)
- Order Littorinimorpha (17 230)
- Superfamily Calyptraeoidea Lamarck, 1809 (203)
- Superfamily Capuloidea J. Fleming, 1822 (220)
- 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 (1 299)
- 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 (689)
- 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 (2 311)
- Superfamily Stromboidea Rafinesque, 1815 (839)
- Superfamily Tonnoidea Suter, 1913 (1825) (787)
- Superfamily Truncatelloidea J. E. Gray, 1840 (6 933)
- Superfamily Vanikoroidea Gray, 1840 (1 331)
- Family Aclididae G. O. Sars, 1878 accepted as Eulimidae R. A. Philippi, 1853
- Genus Austrorissopsis Ponder, 1965 accepted as Austrorissopsis Grant-Mackie & Chapman-Smith, 1971
- Genus Eusetia Cotton, 1944 accepted as Aclis Lovén, 1846
- Genus Marteliella Dautzenberg & Durouchoux, 1914 accepted as Aclis Lovén, 1846
- Genus Menippe Jeffreys, 1867 accepted as Aclis Lovén, 1846
- Genus Pherusa Jeffreys, 1869 accepted as Aclis Lovén, 1846
- Subgenus Pherusa (Cima) Chaster, 1896 accepted as Cima Chaster, 1896
- Species Pherusa carinata Chaster, 1896 accepted as Aclis trilineata R. B. Watson, 1897
- Genus Pherusina Norman, 1888 accepted as Aclis Lovén, 1846
- Genus Schwengelia Bartsch, 1947 accepted as Aclis Lovén, 1846
- Family Asterophilidae Thiele, 1925 accepted as Eulimidae R. A. Philippi, 1853
- Family Enteroxenidae Schwanwitsch, 1917 accepted as Eulimidae R. A. Philippi, 1853
- Family Entocolacidae Voigt, 1888 accepted as Eulimidae R. A. Philippi, 1853
- Family Entoconchidae Keferstein, 1864 accepted as Eulimidae R. A. Philippi, 1853
- Family Eulimidae R. A. Philippi, 1853 (1 095)
- Family Gigantocapulidae Beu, 2007 † (1)
- Family Melanellidae Iredale, 1915 accepted as Eulimidae R. A. Philippi, 1853
- Family Merriidae Hedley, 1918 accepted as Vanikoridae Gray, 1840
- Family Naricidae Récluz, 1845 accepted as Vanikoridae Gray, 1840
- Family Paedophoropodidae A. W. Ivanov, 1933 accepted as Eulimidae R. A. Philippi, 1853
- Family Pelseneeriidae Schwanwitsch, 1917 accepted as Eulimidae R. A. Philippi, 1853
- Family Pherusidae Locard, 1886 accepted as Aclididae G. O. Sars, 1878
- Family Roseniidae Nierstrasz, 1913 accepted as Eulimidae R. A. Philippi, 1853
- Family Stiliferidae H. Adams & A. Adams, 1853 accepted as Eulimidae R. A. Philippi, 1853
- Family Strombiformidae Iredale, 1915 accepted as Eulimidae R. A. Philippi, 1853
- Family Stylinidae R. A. Philippi, 1853 accepted as Eulimidae R. A. Philippi, 1853
- Family Thycidae Thiele, 1929 accepted as Eulimidae R. A. Philippi, 1853
- Family Turtoniidae Rosén, 1910 accepted as Eulimidae R. A. Philippi, 1853
- Family Vanikoridae Gray, 1840 (235)
- Subfamily Thycinae Thiele, 1929 accepted as Eulimidae R. A. Philippi, 1853
- Superfamily Velutinoidea Gray, 1840 (648)
- Superfamily Vermetoidea Rafinesque, 1815 (172)
- Superfamily Xenophoroidea Troschel, 1852 (1840) accepted as Stromboidea Rafinesque, 1815
- Order Neogastropoda (23 828)
- Order Stenoglossa accepted as Neogastropoda
- Subclass Gastropoda incertae sedis (313)
- Subclass Heterobranchia (39 225)
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Neritimorpha (1 916)
- Subclass Orthogastropoda represented as Gastropoda
- Subclass Patellogastropoda (514)
- Subclass Prosobranchia
- Subclass Psilogastropoda represented as Gastropoda
- Subclass Vetigastropoda (6 789)
- 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