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Mollusca (132 791)
Subphylum Aculifera
Subphylum Conchifera
Subphylum Placophora accepted as Polyplacophora
Superclass Aplacophora
Class Amphineura accepted as Aculifera
Class Bivalvia (25 009)
Class Caudofoveata (143)
Class Cephalopoda (1 834)
Class Conchifera accepted as Bivalvia
Class Cricoconarida † (1)
Class Gastropoda (102 697)
Subclass Amphigastropoda † (390)
Subclass Angiogastropoda represented as Gastropoda
Subclass Apogastropoda
Subclass Caenogastropoda (53 636)
Subterclass Sorbeoconcha (147)
Superorder Hypsogastropoda
Order Architaenioglossa (4 918)
Order Caenogastropoda incertae sedis (7 676)
Order Littorinimorpha (17 179)
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 (1 285)
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)
Family Annulariidae J. B. Henderson & Bartsch, 1920 (716)
Family Bembiciidae H. J. Finlay, 1928 accepted as Lacuninae Gray, 1857
Family Bohaispiridae B.-Y. Huang, 1983 † (35)
Family Cyclostomatidae Menke, 1828 accepted as Pomatiidae R. B. Newton, 1891 (1828)
Family Ericiidae Wenz, 1915 accepted as Pomatiidae R. B. Newton, 1891 (1828)
Family Lacunidae Gray, 1857 accepted as Littorinidae Children, 1834
Family Leviathaniidae Harzhauser & S. Schneider, 2014 † (7)
Family Littorinidae Children, 1834 (305)
Family Melarhaphidae Starobogatov & Sitnikova, 1983 accepted as Littorininae Children, 1834
Family Pomatiidae R. B. Newton, 1891 (1828) (281)
Subfamily Cyclotopsinae Kobelt & Möllendorff, 1898 accepted as Pomatiidae R. B. Newton, 1891 (1828)
Genus Anapomatias Hrubesch, 1965 † (1)
Genus Arabia Pallary, 1925 accepted as Rochebrunia Bourguignat, 1881
Genus Bauxia Caziot, 1890 † (3)
Genus Bembridgia P. Fischer, 1885 † (2)
Genus Canaripoma Starobogatov & V. Anistratenko, 1991 accepted as Pomatias S. Studer, 1789
Genus Cinnabarica Neubert, 2009 (5)
Genus Clatripoma Neubert, 2009 (7)
Genus Cochlocycla Jan, 1830 accepted as Pomatias S. Studer, 1789
Genus Cyclostoma Draparnaud, 1801 accepted as Pomatias S. Studer, 1789 (1)
Genus Cyclostomus Montfort, 1810 accepted as Cyclostoma Draparnaud, 1801
Genus Cyclotellina Wenz, 1923 † accepted as Procyclotopsis Wenz, 1924 †
Genus Cyclotellinodes Strand, 1928 † accepted as Procyclotopsis Wenz, 1924 †
Genus Cyclotopsis W. T. Blanford, 1864 (10)
Genus Dioscopoma Neubert, 2009 (7)
Genus Dissostoma Cossmann, 1888 † (8)
Species Dissostoma brauni (Noulet, 1854) †
Species Dissostoma desnoyersianum (Filhol, 1877) †
Species Dissostoma fasciatum (K. Miller, 1907) †
Species Dissostoma mumia (Lamarck, 1804) †
Species Dissostoma sparnacense (Deshayes, 1863) †
Species Dissostoma styx (Oppenheim, 1890) †
Species Dissostoma submumia Doncieux, 1912 †
Species Dissostoma veslense Cossmann, 1907 †
Genus Eichwaldipoma Starobogatov & V. Anistratenko, 1991 accepted as Pomatias S. Studer, 1789
Genus Ericia Partiot, 1848 accepted as Pomatias S. Studer, 1789
Genus Georgia Bourguignat, 1882 accepted as Socotora Pallary, 1925 (3)
Genus Guillainia Crosse, 1885 (1)
Genus Leonia Gray, 1850 (2)
Genus Ligatella E. von Martens, 1880 accepted as Tropidophora Troschel, 1847 (1)
Genus Lithidion J. E. Gray, 1850 (9)
Genus Neobembridgia Kadolsky, 1989 † (1)
Genus Omanitopsis Harzhauser & Neubauer, 2016 † (2)
Genus Palaeocyclotus P. Fischer, 1885 † (3)
Genus Platypoma Neubert, 2009 (1)
Genus Politioana Jekelius, 1944 † accepted as Pomatias S. Studer, 1789
Genus Pomatias S. Studer, 1789 (29)
Genus Procyclotella [sic] † accepted as Procyclotopsis Wenz, 1924 †
Genus Procyclotopsis Wenz, 1924 † (9)
Genus Pseudotopoma Thiele, 1929 accepted as Rochebrunia Bourguignat, 1881
Genus Revoilia Bourguignat, 1881 accepted as Rochebrunia Bourguignat, 1881
Genus Rochebrunia Bourguignat, 1881 (9)
Genus Socotora Pallary, 1925 (6)
Genus Tropidophora Troschel, 1847 (147)
Genus Tudorella P. Fischer, 1885 (14)
Family Purpuroideidae Guzhov, 2004 † (7)
Family Risellidae Kesteven, 1903 accepted as Lacuninae Gray, 1857
Family Skeneopsidae Iredale, 1915 (4)
Family Tripartellidae Gründel, 2001 †
Family Zerotulidae Warén & Hain, 1996 (17)
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 (2 311)
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 (23 716)
Order Stenoglossa accepted as Neogastropoda
Subclass Gastropoda incertae sedis (308)
Subclass Heterobranchia (39 156)
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