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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)
Subclass Autobranchia (23 308)
Infraclass Heteroconchia (16 648)
Subterclass Archiheterodonta (1 208)
Subterclass Euheterodonta (11 366)
Superorder Anomalodesmata (987)
Superorder Imparidentia (10 346)
Order Adapedonta (262)
Order Cardiida (3 057)
Order Galeommatida (791)
Order Gastrochaenida (43)
Order Hiatellida represented as Adapedonta
Order Hippuritida † (322)
Suborder Hippuritidina † (255)
Superfamily Caprinoidea A. d'Orbigny, 1847 † (51)
Family Antillocaprinidae MacGillavry, 1937 † (23)
Family Caprinidae A. d'Orbigny, 1847 † (8)
Family Caprinuloideidae Damestoy, 1971 † (15)
Subfamily Caprinuloideinae Damestoy, 1971 † accepted as Caprinuloideidae Damestoy, 1971 †
Genus Amphitriscoelus G. D. Harris & F. Hodson, 1922 † (2)
Genus Caprinuloidea R. H. Palmer, 1928 † (1)
Genus Coalcomana G. D. Harris & F. Hodson, 1922 † (1)
Genus Conchemipora Chartrousse & Masse, 1998 † (1)
Genus Ethra Matheron, 1878 † accepted as Retha L. R. Cox, 1965 †
Genus Guzzyella Alencáster, 1999 † (2)
Genus Huetamia Alencáster & Pantoja Alor, 1998 † (1)
Species Huetamia buitronae Alencáster & Pantoja Alor, 1998 †
Genus Immanitas R. H. Palmer, 1928 † (1)
Genus Jalpania Alencáster & Aguilar-Pérez, 1996 † (1)
Genus Kimbleia Coogan, 1973 †
Genus Mexicaprina Coogan, 1973 †
Genus Muellerriedia Alencáster, 1999 † (1)
Genus Neokimbleia Mitchell, 2013 †
Genus Oedomyophorus Skelton, 2004 †
Genus Pantojaloria Alencáster & Pantoja Alor, 1996 † (1)
Genus Planocaprina R. H. Palmer, 1928 † (1)
Genus Retha L. R. Cox, 1965 † (2)
Genus Texicaprina Coogan, 1973 †
Genus Youngicaprina Mitchell, 2013 †
Family Ichthyosarcolitidae Douvillé, 1887 † (4)
Genus Oryxia Rineau & Villier, 2018 † (1)
Superfamily Hippuritacea accepted as Radiolitoidea A. d'Orbigny, 1847 †
Superfamily Radiolitoidea A. d'Orbigny, 1847 † (196)
Genus Anodontopleura Felix, 1891 † (1)
Genus Baryconites R. H. Palmer, 1928 † (1)
Genus Cryptaulia Počta, 1889 † (3)
Genus Dessia Pamouktchiev, 1983 † (1)
Genus Lithocalamus Lupher & E. L. Packard, 1929 † (1)
Genus Palus R. H. Palmer, 1928 † (1)
Genus Rousselia Douvillé, 1898 †
Genus Sabinia Parona, 1908 †
Genus Somalites Pamouktchiev, 1983 †
Suborder Requieniidina † (67)
Order Lucinida (997)
Order Megalodontida † (141)
Order Modiomorphida † (94)
Order Myacea accepted as Myida
Order Myida (924)
Order Sphaeriida (662)
Order Venerida (2 826)
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 (4 073)
Superorder Heteroconchia incertae sedis † (1)
Infraclass Pteriomorphia (6 660)
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 (1 838)
Class Conchifera accepted as Bivalvia
Class Cricoconarida † (1)
Class Gastropoda (102 777)
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