Between brackets is the number of accepted species

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- Mollusca (132 738)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (24 984)
- Subclass Autobranchia (23 270)
- Infraclass Heteroconchia (16 634)
- Subterclass Archiheterodonta (1 205)
- Order Actinodontida † (196)
- Order Carditida (1 008)
- Superfamily Astartacea accepted as Crassatelloidea A. Férussac, 1822
- Superfamily Astartoidea A. d'Orbigny, 1844 accepted as Crassatelloidea A. Férussac, 1822
- Superfamily Carditoidea A. Férussac, 1822 (597)
- Family Cardiniidae Zittel, 1881 † (38)
- Family Carditidae A. Férussac, 1822 (491)
- Subfamily Carditamerinae Chavan, 1969 (46)
- Subfamily Carditellinae Kuroda, Habe & Oyama, 1971 accepted as Condylocardiinae F. Bernard, 1896
- Subfamily Carditesinae Chavan, 1969 accepted as Venericardiinae Chavan, 1969
- Subfamily Carditinae A. Férussac, 1822 (66)
- Subfamily Condylocardiinae F. Bernard, 1896 accepted as Condylocardiidae F. Bernard, 1896
- Subfamily Cuninae Chavan, 1969 (80)
- Subfamily Miodomeridinae Chavan, 1969 (44)
- Subfamily Palaeocarditinae Chavan, 1969 † (3)
- Subfamily Scalaricarditinae D. E. Pérez, 2019 (63)
- Subfamily Thecaliinae Dall, 1903 (4)
- Subfamily Venericardiinae Chavan, 1969 (149)
- Genus Actinobolus Mörch, 1853 accepted as Cardites Link, 1807
- Genus Acturellina Chavan, 1951 † accepted as Arcturellina Chavan, 1951
- Genus Agaria J. E. Gray, 1847 accepted as Cardiocardita Anton, 1838
- Genus Arcturella Chavan, 1941 accepted as Arcturellina Chavan, 1951
- Genus Arcturellina Chavan, 1951 (23)
- Genus Bathycardita Iredale, 1924 (1)
- Genus Cardiocardita Anton, 1838 (8)
- Species Cardiocardita ajar (Bruguière, 1792)
- Species Cardiocardita gabonensis Cosel, 1995
- Species Cardiocardita lacunosa (Reeve, 1843)
- Species Cardiocardita obesa Cosel, 1995
- Species Cardiocardita oostinghi Beets, 1987 †
- Species Cardiocardita peregrina Pacaud, 2019 †
- Species Cardiocardita pinnula (Basterot, 1825) †
- Species Cardiocardita tankervillii (W. Wood, 1828)
- Genus Cardites Link, 1807 (16)
- Genus Claibornicardia Stenzel & E. K. Krause, 1957 † (3)
- Genus Darwinicardia D. E. Pérez & del Río, 2017 † (1)
- Genus Fasciculicardia P. A. Maxwell, 1969 †
- Genus Glyptoactis R. B. Stewart, 1930 † (11)
- Genus Kalelia D. E. Pérez & del Río, 2017 †
- Genus Lazariella Sacco, 1899 (3)
- Genus Leuroactis R. B. Stewart, 1930 †
- Genus Lunulicardita Popov, 1983 † accepted as Strophocardia Olsson, 1961
- Genus Megacardita Sacco, 1899 (20)
- Genus Neovenericor Rossi de García & Levy, 1980 † (1)
- Genus Pacificor Verastegui, 1953 †
- Genus Paraglans Chavan, 1941 † (4)
- Genus Purpurocardia P. A. Maxwell, 1969 (17)
- Genus Rotundicardia Heaslip, 1968 † (12)
- Genus Strophocardia Olsson, 1961 (1)
- Genus Venericardia Lamarck, 1801 (25)
- Genus Venericardita Habe, 1958 accepted as Venericardia Lamarck, 1801
- Genus Venericardium [sic] † accepted as Venericardia Lamarck, 1801
- Genus Venericor R. B. Stewart, 1930 † (3)
- Genus Ainicardita Popov, 1983 † (2)
- Genus Carditella E. A. Smith, 1881 (21)
- Genus Chavanella Jaworski, 1939 † accepted as Miodomeris Chavan, 1938 †
- Genus Eomiodon Chavan, 1936 † accepted as Miodomeris Chavan, 1938 †
- Genus Fenestricardita R. Casey, 1961 † (1)
- Genus Hamacuna Cotton, 1931 (6)
- Genus Maghrebella Freneix, 1972 † (1)
- Genus Trapezicardita R. Casey, 1961 † (1)
- Genus Tutcheria L. R. Cox, 1946 † (4)
- Family Condylocardiidae F. Bernard, 1896 (68)
- Family Palaeocarditidae Chavan, 1969 † accepted as Palaeocarditinae Chavan, 1969 †
- Superfamily Crassatelloidea A. Férussac, 1822 (410)
- Family Archaeocardiidae Khalfin, 1940 †
- Family Eodonidae J. G. Carter, D. C. Campbell & M. R. Campbell, 2000 † (1)
- Order unranked_Archiheterodonta † (1)
- Subterclass Euheterodonta (11 356)
- Subterclass Heterodonta
- Subterclass Palaeoheterodonta (4 072)
- Superorder Heteroconchia incertae sedis † (1)
- Infraclass Pteriomorphia (6 636)
- 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 (1 830)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 673)
- 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