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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)
Superfamily Ampullarioidea Gray, 1824 (250)
Superfamily Cyclophoroidea J. E. Gray, 1847 (3 905)
Family Aciculidae J. E. Gray, 1850 (104)
Family Acmeidae Pollonera, 1905 accepted as Aciculidae J. E. Gray, 1850
Family Alycaeidae W. T. Blanford, 1864 accepted as Alycaeinae W. T. Blanford, 1864
Family Bolaniidae Wenz, 1915 accepted as Craspedopomatidae Kobelt & Möllendorff, 1898
Family Cochlostomatidae Kobelt, 1902 (118)
Family Craspedopomatidae Kobelt & Möllendorff, 1898 (21)
Family Cyclophoridae J. E. Gray, 1847 (1 604)
Family Cytoridae Climo, 1969 accepted as Liareinae A. W. B. Powell, 1946
Family Dicristidae A. N. Golikov & Starobogatov, 1975 accepted as Neocyclotidae Kobelt & Möllendorff, 1897
Family Diplommatinidae L. Pfeiffer, 1856 (1 026)
Family Ferussinidae Wenz, 1923 (1915) † accepted as Ferussininae Wenz, 1923 (1915) †
Family Hainesiidae Thiele, 1929 (220)
Family Lagocheilidae Stoliczka, 1872 accepted as Cyclophoridae J. E. Gray, 1847
Family Maizaniidae Tielecke, 1940 (40)
Family Megalomastomatidae W. T. Blanford, 1864 (100)
Family Megalostomatidae [sic] accepted as Megalomastomatidae W. T. Blanford, 1864
Family Neocyclotidae Kobelt & Möllendorff, 1897 (242)
Subfamily Amphicyclotinae Kobelt & Möllendorff, 1897 (49)
Genus Amphicyclotulus Kobelt, 1912 (10)
Genus Amphicyclotus Crosse & P. Fischer, 1879 (11)
Genus Barbacyclus Bartsch & J. P. E. Morrison, 1942 (3)
Species Barbacyclus boucardi (Angas, 1878)
Species Barbacyclus princeps (Pilsbry, 1935)
Species Barbacyclus underwoodi (S. I. Da Costa, 1900)
Genus Calacyclotus Bartsch & J. P. E. Morrison, 1942 (2)
Genus Cyclohaitia Bartsch, 1942 (1)
Genus Cyclopedus Gargominy & Muratov, 2012 (1)
Genus Dublonia Clench, 1949 accepted as Ostodes (Dublonia) Clench, 1949
Genus Filocyclus Bartsch & J. P. E. Morrison, 1942 (1)
Genus Lagocyclus Bartsch & J. P. E. Morrison, 1942 (5)
Genus Liracyclotus Bartsch & J. P. E. Morrison, 1942 (1)
Genus Megacyclotus Bartsch & J. P. E. Morrison, 1942 accepted as Amphicyclotus Crosse & P. Fischer, 1879
Genus Ostodes A. Gould, 1862 (14)
Subfamily Crocidopomatinae F. G. Thompson, 1967 accepted as Neocyclotinae Kobelt & Möllendorff, 1897
Subfamily Crocidopominae F. G. Thompson, 1967 accepted as Neocyclotinae Kobelt & Möllendorff, 1897
Subfamily Neocyclotinae Kobelt & Möllendorff, 1897 (157)
Genus Austrocyclotus Bartsch, 1942 accepted as Neocyclotus Crosse & P. Fischer, 1886
Genus Buckleyia E. T. Higgins, 1872 accepted as Daronia A. Adams, 1861
Genus Cycladamsia Bartsch, 1942 (5)
Genus Cyclochittya J. P. E. Morrison, 1955 (6)
Genus Cyclojamaicia Bartsch, 1942 (2)
Genus Cyclopilsbrya Bartsch, 1942 (12)
Genus Cyclovendreysia Bartsch, 1942 (1)
Genus Daronia A. Adams, 1861 (6)
Genus Incerticyclus J. P. E. Morrison, 1955 (3)
Genus Rugicyclotus J. P. E. Morrison, 1955 (1)
Family Pollicariidae Thiele, 1929 (6)
Family Pupinidae L. Pfeiffer, 1853 (421)
Family Strophostomatidae Wenz, 1915 † accepted as Ferussininae Wenz, 1923 (1915) †
Genus Carinomphalus W. Yü, 1974 † (1)
Genus Diplommoptychia Maillard, 1884 †
Genus Loriolina Huckriede, 1967 † (1)
Genus Maillardinus Bandel, 1991 † (1)
Superfamily Viviparoidea Gray, 1847 (764)
Order Caenogastropoda incertae sedis (7 677)
Order Littorinimorpha (17 189)
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