Between brackets is the number of accepted species

Click on "-" to collapse/hide all child taxa
Shows the number of accepted species within the taxon
The last expanded taxon is highlighted
Click on "+" to expand/show all child taxa
Click to see the taxon details page
- Mollusca (133 221)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 077)
- Subclass Autobranchia (23 354)
- Infraclass Heteroconchia (16 679)
- Subterclass Archiheterodonta (1 210)
- Subterclass Euheterodonta (11 394)
- Superorder Anomalodesmata (990)
- Superorder Imparidentia (10 371)
- Order Adapedonta (263)
- Order Cardiida (3 058)
- Order Galeommatida (791)
- Order Gastrochaenida (43)
- Order Hiatellida represented as Adapedonta
- Order Hippuritida † (322)
- Suborder Hippuritidina † (255)
- Superfamily Caprinoidea A. d'Orbigny, 1847 † (51)
- 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 †
- Species Sabinia klinghardti J. Böhm, 1927 † accepted as Pseudosabinia klinghardti (J. Böhm, 1927) †
- Species Sabinia orbiculata R. H. Palmer, 1928 †
- Species Sabinia totiseptata R. H. Palmer, 1928 †
- Species Sabinia vivari R. H. Palmer, 1928 †
- Genus Somalites Pamouktchiev, 1983 †
- Suborder Requieniidina † (67)
- Order Lucinida (998)
- Order Megalodontida † (141)
- Order Modiomorphida † (95)
- Order Myacea accepted as Myida
- Order Myida (925)
- Order Sphaeriida (662)
- Order Venerida (2 827)
- 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 † (102)
- Superfamily Kalenteroidea Marwick, 1953 † (46)
- 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 (4 074)
- Superorder Heteroconchia incertae sedis † (1)
- Infraclass Pteriomorphia (6 675)
- Subclass Bivalvia incertae sedis (7)
- Subclass Palaeotaxodonta accepted as Nuculida
- Subclass Paleoheterodonta accepted as Palaeoheterodonta
- Subclass Protobranchia (1 374)
- Infraclass Cryptodonta † (342)
- Class Caudofoveata (143)
- Class Cephalopoda (1 917)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 971)
- 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 (1 381)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Rostroconchia † (64)
- Class Scaphopoda (753)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata