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 (132 754)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (24 992)
- Subclass Autobranchia (23 278)
- Infraclass Heteroconchia (16 634)
- Subterclass Archiheterodonta (1 205)
- Subterclass Euheterodonta (11 356)
- Superorder Anomalodesmata (987)
- Superorder Imparidentia (10 336)
- Order Adapedonta (260)
- Order Cardiida (3 055)
- 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)
- Suborder Myina represented as Myida
- Superfamily Dreissenoidea J. E. Gray, 1840 (304)
- Superfamily Myoidea Lamarck, 1809 (309)
- Superfamily Pholadacea accepted as Pholadoidea Lamarck, 1809
- Superfamily Pholadoidea Lamarck, 1809 (294)
- Family Pholadidae Lamarck, 1809 (123)
- Subfamily Jouannetiinae Tryon, 1862 (17)
- Genus Jouannetia Desmoulins, 1828 (13)
- Genus Netastoma P. P. Carpenter, 1864 (4)
- Species Netastoma darwinii (G. B. Sowerby II, 1849)
- Species Netastoma japonicum (Yokoyama, 1920)
- Species Netastoma rostratum (Valenciennes, 1846)
- Species Netastoma squiresi G. L. Kennedy, 1993 †
- Genus Nettastomella P. P. Carpenter, 1865 accepted as Netastoma P. P. Carpenter, 1864
- Genus Pholadopsis Conrad, 1849 accepted as Jouannetia (Pholadopsis) Conrad, 1849
- Genus Scyphomya Dall, 1898 accepted as Jouannetia Desmoulins, 1828
- Genus Triomphalia G. B. Sowerby II, 1849 accepted as Jouannetia Desmoulins, 1828
- Subfamily Martesiinae U. S. Grant & Gale, 1931 (58)
- Subfamily Pholadideinae Taki & Habe, 1955 accepted as Martesiinae U. S. Grant & Gale, 1931
- Subfamily Pholadinae Lamarck, 1809 (48)
- Subfamily Xylophagainae Purchon, 1941 accepted as Xylophagaidae Purchon, 1941
- Family Teredinidae Rafinesque, 1815 (103)
- Family Xylophagaidae Purchon, 1941 (68)
- Family Xylophagidae Purchon, 1941 accepted as Xylophagaidae Purchon, 1941
- Superfamily Pleuromyoidea Zittel, 1895 † (17)
- Family Aloididae Thiele, 1934 accepted as Corbulidae Lamarck, 1818
- Family Myacidae accepted as Myidae Lamarck, 1809
- 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 (6 644)
- 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 (1 832)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 679)
- 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