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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)
Subclass Autobranchia (23 295)
Infraclass Heteroconchia (16 637)
Subterclass Archiheterodonta (1 208)
Subterclass Euheterodonta (11 356)
Superorder Anomalodesmata (987)
Superorder Imparidentia (10 336)
Order Adapedonta (260)
Order Cardiida (3 055)
Superfamily Anthracosioidea Amalitzky, 1892 † (215)
Superfamily Cardiacea accepted as Cardioidea Lamarck, 1809
Superfamily Cardioidea Lamarck, 1809 (1 536)
Superfamily Tellinacea accepted as Tellinoidea Blainville, 1814
Superfamily Tellinoidea Blainville, 1814 (1 304)
Family Amphidesmatidae Latreille, 1825 accepted as Semelidae Stoliczka, 1870 (1825)
Family Asaphidae Winckworth, 1932 accepted as Psammobiidae J. Fleming, 1828
Family Donacidae J. Fleming, 1828 (144)
Family Garidae Stoliczka, 1870 accepted as Psammobiidae J. Fleming, 1828
Family Icanotiidae R. Casey, 1961 † (7)
Family Lavignonidae Récluz, 1869 accepted as Semelidae Stoliczka, 1870 (1825)
Family Psammobiidae J. Fleming, 1828 (147)
Family Quenstedtiidae L. R. Cox, 1929 † (3)
Family Sanguinolariidae M. Smith, 1937 accepted as Psammobiidae J. Fleming, 1828
Family Scrobiculariidae H. Adams & A. Adams, 1856 accepted as Semelidae Stoliczka, 1870 (1825) (2)
Family Semelidae Stoliczka, 1870 (1825) (205)
Family Solecurtidae A. d'Orbigny, 1846 (54)
Genus Adasius Leach, 1852 accepted as Solecurtus Blainville, 1824
Genus Azor T. Brown, 1844 accepted as Azorinus Récluz, 1869
Genus Azorinus Récluz, 1869 (7)
Genus Clunaculum Dall, 1899 (1)
Genus Cultellus Conrad, 1837 accepted as Tagelus (Mesopleura) Conrad, 1868
Genus Cyrtosolen Herrmannsen, 1848 accepted as Solecurtus Blainville, 1824
Genus Macha Oken, 1835 accepted as Solecurtus Blainville, 1824
Genus Mesopleura Conrad, 1868 accepted as Tagelus (Mesopleura) Conrad, 1868
Genus Polia A. d'Orbigny, 1845 accepted as Pharus J. E. Gray, 1840
Genus Psammosolen Risso, 1826 accepted as Solecurtus Blainville, 1824
Subgenus Psammosolen (Zozia) Winckworth, 1930 accepted as Azorinus Récluz, 1869
Species Psammosolen guaymasensis H. N. Lowe, 1935 accepted as Solecurtus guaymasensis (H. N. Lowe, 1935)
Species Psammosolen truncatus O. Boettger, 1875 † accepted as Solecurtus truncatus (O. Boettger, 1875) †
Genus Siliquaria Schumacher, 1817 accepted as Tagelus J. E. Gray, 1847
Genus Solecurtellus Ghosh, 1920 accepted as Tagelus J. E. Gray, 1847
Genus Solecurtus Blainville, 1824 (33)
Genus Solenocurtellus Thiele, 1934 accepted as Tagelus J. E. Gray, 1847
Genus Solenocurtus P. Fischer, 1887 accepted as Solecurtus Blainville, 1824 (1)
Genus Subtagelus Ghosh, 1920 accepted as Tagelus (Mesopleura) Conrad, 1868
Genus Tagalus P. Fischer, 1887 accepted as Tagelus J. E. Gray, 1847
Genus Tagelus J. E. Gray, 1847 (12)
Genus Zozia Winckworth, 1930 accepted as Azorinus Récluz, 1869
Family Sowerbyidae L. R. Cox, 1929 † (1)
Family Tancrediidae Meek, 1864 † (4)
Family Tellinidae Blainville, 1814 (737)
Family Unicardiopsidae Chavan, 1969 †
Subfamily Scrobiculariinae H. Adams & A. Adams, 1856 accepted as Semelidae Stoliczka, 1870 (1825)
Superfamily Tridacnoidea accepted as Tridacninae Lamarck, 1819
Order Galeommatida (791)
Order Gastrochaenida (43)
Order Hiatellida represented as Adapedonta
Order Hippuritida † (321)
Order Lucinida (997)
Order Megalodontida † (141)
Order Modiomorphida † (94)
Order Myacea accepted as Myida
Order Myida (924)
Order Sphaeriida (662)
Order Venerida (2 821)
Superfamily Cyamioidea G. O. Sars, 1878 (98)
Superfamily Gaimardioidea Hedley, 1916 accepted as Cyamioidea G. O. Sars, 1878
Superfamily Galeommatacea accepted as Galeommatoidea J. E. Gray, 1840
Superfamily Grammysioidea S. A. Miller, 1877 † (90)
Superfamily Kalenteroidea Marwick, 1953 † (39)
Superfamily Mactracea accepted as Mactroidea Lamarck, 1809
Order Anomalodesmacea accepted as Anomalodesmata
Order Euheterodonta incertae sedis (27)
Order Pholadomyida represented as Anomalodesmata
Family Lipanellidae T. M. Sánchez, 2005 † (4)
Family Rhaetidiidae Dominici & Danise, 2024 † (2)
Subterclass Heterodonta
Subterclass Palaeoheterodonta (4 072)
Superorder Heteroconchia incertae sedis † (1)
Infraclass Pteriomorphia (6 658)
Subclass Bivalvia incertae sedis (7)
Subclass Palaeotaxodonta accepted as Nuculida
Subclass Paleoheterodonta accepted as Palaeoheterodonta
Subclass Protobranchia (1 365)
Infraclass Cryptodonta † (342)
Class Caudofoveata (143)
Class Cephalopoda (1 834)
Class Conchifera accepted as Bivalvia
Class Cricoconarida † (1)
Class Gastropoda (102 697)
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