Between brackets is the number of accepted species

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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)
- Family Sowerbyidae L. R. Cox, 1929 † (1)
- Family Tancrediidae Meek, 1864 † (4)
- Family Tellinidae Blainville, 1814 (737)
- Subfamily Aenigmotellininae M. Huber, Langleit & Kreipl, 2015 (8)
- Subfamily Apolymetinae M. Huber, Langleit & Kreipl, 2015 (16)
- Subfamily Arcopagiinae M. Huber, Langleit & Kreipl, 2015 (93)
- Subfamily Gastraninae M. Huber, Langleit & Kreipl, 2015 (16)
- Subfamily Macominae Olsson, 1961 (124)
- Subfamily Moerellinae M. Huber, Langleit & Kreipl, 2015 (49)
- Subfamily Phyllodainae M. Huber, Langleit & Kreipl, 2015 (1)
- Subfamily Strigillinae Habe, 1977 (24)
- Genus Strigilla W. Turton, 1822 (24)
- Subgenus Strigilla (Aeretica) Dall, 1900 represented as Strigilla W. Turton, 1822
- Subgenus Strigilla (Pisostrigilla) Olsson, 1961 represented as Strigilla W. Turton, 1822
- Subgenus Strigilla (Rombergia) Dall, 1900 represented as Strigilla W. Turton, 1822
- Subgenus Strigilla (Simplistrigilla) Olsson, 1961 represented as Strigilla W. Turton, 1822
- Subgenus Strigilla (Strigilla) W. Turton, 1822 represented as Strigilla W. Turton, 1822
- Species Strigilla amitrovi Glibert & van de Poel, 1967 † accepted as Cyclotellina amitrovi (Glibert & van de Poel, 1967) †
- Species Strigilla australis Tate, 1887 †
- Species Strigilla carnaria (Linnaeus, 1758)
- Species Strigilla chroma A. E. Salisbury, 1934
- Species Strigilla cicercula (R. A. Philippi, 1846)
- Species Strigilla costulifera Mörch, 1860 accepted as Strigilla dichotoma (R. A. Philippi, 1846)
- Species Strigilla cyrenoidea (Hanley, 1844)
- Species Strigilla densestriata Preston, 1908
- Species Strigilla dichotoma (R. A. Philippi, 1846)
- Species Strigilla disjuncta P. P. Carpenter, 1856 accepted as Strigilla sincera (Hanley, 1844)
- Species Strigilla elegans M. Huber, Langleit & Kreipl, 2015
- Species Strigilla elegantissima Bertin, 1878
- Species Strigilla ervilia (R. A. Philippi, 1846)
- Species Strigilla euronia Hedley, 1908
- Species Strigilla eutykta J. A. Gardner & Aldrich, 1919 †
- Species Strigilla flexuosa (Say, 1822) accepted as Tellina flexuosa Say, 1822
- Species Strigilla gabbi Olsson & McGinty, 1958
- Species Strigilla grasi M. Huber, Langleit & Kreipl, 2015
- Species Strigilla grossiana Hedley, 1908
- Species Strigilla interrupta Mörch, 1860
- Species Strigilla magna Mörch, 1860 accepted as Strigilla cicercula (R. A. Philippi, 1846)
- Species Strigilla mirabilis (R. A. Philippi, 1841)
- Species Strigilla panamensis Olsson, 1961 accepted as Strigilla interrupta Mörch, 1860
- Species Strigilla pilsbryi Olsson & McGinty, 1958 accepted as Strigilla pisiformis (Linnaeus, 1758)
- Species Strigilla pisiformis (Linnaeus, 1758)
- Species Strigilla polyaulax Tomlin & Shackleford, 1915 accepted as Strigilla splendida (Anton, 1838)
- Species Strigilla producta Tryon, 1870
- Species Strigilla pseudocarnaria Boss, 1969
- Species Strigilla rombergii Mörch, 1853 accepted as Strigilla carnaria (Linnaeus, 1758)
- Species Strigilla salisburyi Glibert & van de Poel, 1967 †
- Species Strigilla serrata Mörch, 1860
- Species Strigilla sincera (Hanley, 1844)
- Species Strigilla splendida (Anton, 1838)
- Species Strigilla strata Olsson, 1961 accepted as Strigilla serrata Mörch, 1860
- Species Strigilla surinamensis Boss, 1972
- Species Strigilla tomlini E. A. Smith, 1915
- Species Strigilla trotteriana G. B. Sowerby III, 1894 accepted as Iacra trotteriana (G. B. Sowerby III, 1894)
- Subfamily Tellininae Blainville, 1814 (389)
- Genus Aeretica Dall, 1900 accepted as Strigilla (Aeretica) Dall, 1900
- Genus Ascitellina Marwick, 1928 accepted as Elliptotellina Cossmann, 1886
- Genus Atlantella M. Huber, Langleit & Kreipl, 2015 accepted as Moerella P. Fischer, 1887
- Genus Bartrumia Marwick, 1934 † (2)
- Genus Barytellina Marwick, 1924 † (2)
- Genus Bertinella Glibert & van de Poel, 1967 † (1)
- Genus Capsa H. Adams & A. Adams, 1856 accepted as Leporimetis Iredale, 1930
- Genus Cydippe Leach, 1852 accepted as Arcopagia T. Brown, 1827
- Genus Cydippina Dall, 1900 accepted as Psammotreta Dall, 1900
- Genus Dellius M. Huber, Langleit & Kreipl, 2015 (1)
- Genus Finlayella Laws, 1933 † (4)
- Genus Florimetis Olsson & Harbison, 1953 accepted as Leporimetis Iredale, 1930
- Genus Hemimetis Thiele, 1934 accepted as Apolymetis A. E. Salisbury, 1929
- Genus Iraqitellina Dance & Eames, 1966 accepted as Tellinangulus Thiele, 1934
- Genus Limicola Leach, 1852 accepted as Macoma Leach, 1819
- Genus Linearia Conrad, 1860 † (2)
- Genus Liotellina P. Fischer, 1887 accepted as Tellina Linnaeus, 1758
- Genus Liotribella Afshar, 1969 accepted as Tellinella Mörch, 1853
- Genus Loxoglypta Dall, Bartsch & Rehder, 1938 accepted as Jactellina Iredale, 1929
- Genus Maera [sic] accepted as Moerella P. Fischer, 1887
- Genus Maoritellina Finlay, 1926 accepted as Serratina Pallary, 1920
- Genus Metis H. Adams & A. Adams, 1856 accepted as Apolymetis A. E. Salisbury, 1929
- Genus Musculus Mörch, 1853 accepted as Tellina Linnaeus, 1758
- Genus Nipponopagia Ogasawara, 1977 † accepted as Macoma Leach, 1819
- Genus Obtellina Iredale, 1929 accepted as Quadrans (Obtellina) Iredale, 1929
- Genus Palaeomoera Stoliczka, 1870 † (4)
- Genus Peronaeoderma Poli, 1795 accepted as Peronaea Poli, 1791
- Genus Pilsbrymetis Afshar, 1969 accepted as Leporimetis Iredale, 1930
- Genus Pinguimacoma Iredale, 1936 accepted as Macoma (Pinguimacoma) Iredale, 1936
- Genus Pisostrigilla Olsson, 1961 accepted as Strigilla (Pisostrigilla) Olsson, 1961
- Genus Pistris Thiele, 1934 accepted as Serratina Pallary, 1920
- Genus Polymetis A. E. Salisbury, 1929 accepted as Apolymetis A. E. Salisbury, 1929
- Genus Pristis Jousseaume, 1918 accepted as Pistris Thiele, 1934
- Genus Psammothalia Olsson, 1961 accepted as Temnoconcha Dall, 1921
- Genus Pseudometis Jousseaume, 1918 accepted as Psammacoma Dall, 1900
- Genus Punipagia Iredale, 1930 accepted as Abranda Iredale, 1924
- Genus Quodrans [sic] accepted as Quadrans Bertin, 1878
- Genus Roemerilla Afshar, 1969 accepted as Strigilla W. Turton, 1822
- Genus Rombergia Dall, 1900 accepted as Strigilla W. Turton, 1822
- Genus Schumacheria Cossmann, 1902 accepted as Psammotreta Dall, 1900
- Genus Scrobiculina Dall, 1900 accepted as Psammotreta Dall, 1900
- Genus Simplistrigilla Olsson, 1961 accepted as Strigilla (Simplistrigilla) Olsson, 1961
- Genus Sinomacoma G. Yamamoto & Habe, 1959 accepted as Heteromacoma Habe, 1952
- Genus Smitharcopagia Afshar, 1969 accepted as Scutarcopagia Pilsbry, 1918
- Genus Smithsonella Afshar, 1969 accepted as Scutarcopagia Pilsbry, 1918
- Genus Solyma Conrad, 1870 † (1)
- Genus Tellinarius Froriep, 1806 accepted as Tellina Linnaeus, 1758
- Genus Tellinarius A. E. Salisbury, 1934 accepted as Tellinella Mörch, 1853
- Genus Tellinites Schlotheim, 1820 †
- Genus Tellinungula Römer, 1873 accepted as Macalia H. Adams, 1861
- Genus Uncidens Coen, 1934 accepted as Gastrana Schumacher, 1817
- Genus Zearcopagia H. J. Finlay, 1926 accepted as Pseudarcopagia Bertin, 1878
- 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