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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)
- 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)
- Order Sphaeriida (662)
- Order Venerida (2 821)
- Superfamily Arcticoidea R. B. Newton, 1891 (1844) (67)
- Superfamily Chamoidea Lamarck, 1809 (105)
- Superfamily Corbiculoidea J. E. Gray, 1847 accepted as Cyrenoidea J. E. Gray, 1840
- Superfamily Cyrenoidea J. E. Gray, 1840 (441)
- Superfamily Cyrenoidoidea H. Adams & A. Adams, 1857 (1853) accepted as Cyrenoidea J. E. Gray, 1840
- Superfamily Glossoidea J. E. Gray, 1847 (1840) (218)
- Superfamily Hemidonacoidea Scarlato & Starobogatov, 1971 (7)
- Superfamily Mactroidea Lamarck, 1809 (372)
- Superfamily Opokielloidea Kanev, 1983 † (10)
- Superfamily Palaeanodontoidea Modell, 1964 † accepted as Palaeomuteloidea Lahusen, 1897 †
- Superfamily Prilukielloidea Starobogatov, 1970 † (59)
- Superfamily Ungulinoidea J. E. Gray, 1854 (159)
- Superfamily Veneracea accepted as Veneroidea Rafinesque, 1815
- Superfamily Veneroidea Rafinesque, 1815 (1 383)
- Family Bernardinidae Keen, 1969 accepted as Neoleptonidae Thiele, 1934
- Family Callocardiidae Dall, 1895 accepted as Callocardiinae Dall, 1895
- Family Chionidae Frizzell, 1936 accepted as Chioninae Frizzell, 1936
- Family Clementiidae Frizzell, 1936 accepted as Clementiinae Frizzell, 1936
- Family Cooperellidae Dall, 1900 accepted as Petricolinae A. d'Orbigny, 1840
- Family Dosiniidae Deshayes, 1853 † accepted as Dosiniinae Deshayes, 1853
- Family Gafrariidae Korobkov, 1954 accepted as Gouldiinae R. B. Stewart, 1930
- Family Isocyprinidae R. N. Gardner, 2005 † (4)
- Family Meretricidae J. E. Gray, 1847 accepted as Meretricinae J. E. Gray, 1847
- Family Mysiidae J. E. Gray, 1854 accepted as Petricolinae A. d'Orbigny, 1840
- Family Neoleptonidae Thiele, 1934 (61)
- Family Oncophoridae Davitashvili, 1934 † accepted as Tapetinae J. E. Gray, 1851
- Family Petricolidae A. d'Orbigny, 1840 accepted as Petricolinae A. d'Orbigny, 1840
- Family Rzehakiidae Korobkov, 1954 † accepted as Tapetinae J. E. Gray, 1851
- Family Sunettidae Stoliczka, 1870 accepted as Sunettinae Stoliczka, 1870
- Family Turtoniidae W. Clark, 1855 accepted as Turtoniinae W. Clark, 1855
- Family Veneridae Rafinesque, 1815 (1 318)
- Subfamily Arteminae F. W. Hutton, 1880 accepted as Dosiniinae Deshayes, 1853
- Subfamily Callistinae T. Habe & Kosuge, 1967 accepted as Callocardiinae Dall, 1895
- Subfamily Callocardiinae Dall, 1895 (318)
- Subfamily Chioninae Frizzell, 1936 accepted as Venerinae Rafinesque, 1815
- Subfamily Circinae Dall, 1895 accepted as Gouldiinae R. B. Stewart, 1930
- Subfamily Clementiinae Frizzell, 1936 (14)
- Subfamily Cyclininae Frizzell, 1936 (10)
- Subfamily Cythereinae J. E. Gray, 1838 accepted as Meretricinae J. E. Gray, 1847
- Subfamily Dosiniinae Deshayes, 1853 (158)
- Subfamily Gemminae Dall, 1895 (3)
- Subfamily Gouldiinae R. B. Stewart, 1930 (63)
- Genus Circe Schumacher, 1817 (13)
- Genus Circenita Jousseaume, 1888 (4)
- Genus Circentia [sic] accepted as Circenita Jousseaume, 1888
- Genus Comus L. R. Cox, 1930 (1)
- Genus Crenocirce Habe, 1960 accepted as Dorisca Dall, Bartsch & Rehder, 1938
- Genus Dorisca Dall, Bartsch & Rehder, 1938 (6)
- Genus Gafrarium Röding, 1798 (20)
- Subgenus Gafrarium (Circe) Schumacher, 1817 accepted as Circe Schumacher, 1817
- Subgenus Gafrarium (Corbis) Cuvier, 1816 accepted as Fimbria Megerle von Mühlfeld, 1811
- Subgenus Gafrarium (Crista) Römer, 1857 accepted as Gafrarium Röding, 1798
- Subgenus Gafrarium (Gafrarium) Röding, 1798 represented as Gafrarium Röding, 1798
- Subgenus Gafrarium (Gouldia) C. B. Adams, 1847 accepted as Gouldia C. B. Adams, 1847
- Subgenus Gafrarium (Roemeriana) M. Huber, 2010 represented as Gafrarium Röding, 1798
- Species Gafrarium aduncum (Römer, 1869)
- Species Gafrarium aequivocum (Holten, 1802)
- Species Gafrarium alfredense (Bartsch, 1915)
- Species Gafrarium angulatum Röding, 1798 accepted as Gafrarium tumidum Röding, 1798
- Species Gafrarium arabicum (Lamarck, 1818) accepted as Circenita varia (Forsskål, 1775)
- Species Gafrarium australe (G. B. Sowerby II, 1851)
- Species Gafrarium barandae (Hidalgo, 1885)
- Species Gafrarium caelatum A. Adams, 1854 accepted as Herouvalia caelata (A. Adams, 1854)
- Species Gafrarium californiensis [sic] accepted as Gouldia californica Dall, 1917
- Species Gafrarium callipygum (von Born, 1778) accepted as Circenita callipyga (Born, 1778)
- Species Gafrarium cardiodeum Röding, 1798 accepted as Gafrarium pectinatum (Linnaeus, 1758)
- Species Gafrarium catillum Hedley, 1909
- Species Gafrarium catillus Hedley, 1909 accepted as Gafrarium catillum Hedley, 1909
- Species Gafrarium costatum Röding, 1798 accepted as Gafrarium pectinatum (Linnaeus, 1758)
- Species Gafrarium depressum Röding, 1798 accepted as Gafrarium pectinatum (Linnaeus, 1758)
- Species Gafrarium discors (Gmelin, 1791)
- Species Gafrarium dispar (Holten, 1802)
- Species Gafrarium divaricata [sic] accepted as Gafrarium divaricatum (Gmelin, 1791)
- Species Gafrarium divaricatum (Gmelin, 1791)
- Species Gafrarium eximium (M. Hörnes, 1861) †
- Species Gafrarium hanzawai Nomura & Zinbo, 1936 accepted as Dorisca amica (E. A. Smith, 1885)
- Species Gafrarium harteae M. Huber, 2010
- Species Gafrarium hartei M. Huber, 2010 accepted as Gafrarium harteae M. Huber, 2010
- Species Gafrarium minima (Montagu, 1803) accepted as Gouldia minima (Montagu, 1803)
- Species Gafrarium minimum (Montagu, 1803) accepted as Gouldia minima (Montagu, 1803)
- Species Gafrarium navigatum Hedley, 1906 accepted as Fluctiger navigatus (Hedley, 1906)
- Species Gafrarium numulinum (Lamarck, 1818)
- Species Gafrarium obliquissimum (E. A. Smith, 1885)
- Species Gafrarium pectinatum (Linnaeus, 1758)
- Species Gafrarium perornatum N. H. Woods, 1931 †
- Species Gafrarium pulchella (Abrard, 1947) †
- Species Gafrarium savignyi (Jonas, 1846)
- Species Gafrarium scitulum A. Adams, 1854 accepted as Notomyrtea scitula (A. Adams, 1854)
- Species Gafrarium soyoae (Habe, 1951) accepted as Laevicirce soyoae Habe, 1951
- Species Gafrarium speciosum (Römer, 1869)
- Species Gafrarium stephensae E. K. Jordan, 1936 accepted as Gouldia californica Dall, 1917
- Species Gafrarium tumidum Röding, 1798
- Species Gafrarium venustum (K. Martin, 1879) †
- Species Gafrarium yukitai Habe, 1977 accepted as Gafrarium barandae (Hidalgo, 1885)
- Genus Gouldia C. B. Adams, 1847 (10)
- Genus Gouldiopa Iredale, 1924 (1)
- Genus Laevicirce T. Habe, 1951 (2)
- Genus Microcirce Habe, 1951 (3)
- Genus Parmulina Dall, 1902 accepted as Circe (Parmulophora) Dall, 1905
- Genus Parmulophora Dall, 1905 accepted as Circe (Parmulophora) Dall, 1905
- Genus Parvicirce Cosel, 1995 (1)
- Genus Privigna Dall, Bartsch & Rehder, 1938 (1)
- Genus Redicirce Iredale, 1936 (1)
- Subfamily Lioconchinae Habe, 1977 accepted as Callocardiinae Dall, 1895
- Subfamily Mclellaniinae D. Wilson, 1983 † accepted as Chioninae Frizzell, 1936
- Subfamily Meretricinae J. E. Gray, 1847 (87)
- Subfamily Meroinae Tryon, 1884 accepted as Sunettinae Stoliczka, 1870
- Subfamily Paphiinae Finlay, 1928 accepted as Tapetinae J. E. Gray, 1851
- Subfamily Petricolinae A. d'Orbigny, 1840 (53)
- Subfamily Pitarinae R. B. Stewart, 1930 accepted as Callocardiinae Dall, 1895 (6)
- Subfamily Samarangiinae Keen, 1969 (4)
- Subfamily Sunettinae Stoliczka, 1870 (22)
- Subfamily Tapetinae J. E. Gray, 1851 (171)
- Subfamily Turtoniinae W. Clark, 1855 (1)
- Subfamily Venerinae Rafinesque, 1815 (372)
- Genus Acritopaphia Iredale, 1936 accepted as Paphia Röding, 1798
- Genus Ampithaea Leach, 1852 accepted as Dosinia Scopoli, 1777
- Genus Anaitis Römer, 1857 accepted as Placamen Iredale, 1925
- Genus Aphrodina Conrad, 1869 † (3)
- Genus Arctoe Risso, 1826 accepted as Dosinia Scopoli, 1777
- Genus Artemis Conrad, 1831 accepted as Dosinia Scopoli, 1777
- Genus Artemis Poli [auctt.] accepted as Arthemis Poli, 1791
- Genus Arthemiderma Poli, 1795 accepted as Dosinia Scopoli, 1777
- Genus Arthemis Poli, 1791 accepted as Dosinia Scopoli, 1777
- Genus Asa Basterot, 1825 accepted as Dosinia (Asa) Basterot, 1825
- Genus Atopodonta Cossmann, 1886 † accepted as Callocardia (Atopodonta) Cossmann, 1886 †
- Genus Aureitapes Chiamenti, 1900 accepted as Polititapes Chiamenti, 1900
- Genus Austrocardilanx R. N. Gardner, 2005 † (2)
- Genus Callicistronia Dall, 1883 accepted as Parastarte Conrad, 1862
- Genus Callistina Jukes-Browne, 1908 † (2)
- Genus Callistinae F. Nordsieck, 1969 accepted as Callocardiinae Dall, 1895
- Genus Callizona Jukes-Browne, 1913 accepted as Transennella Dall, 1884
- Genus Callizonata Strand, 1928 accepted as Transennella Dall, 1884
- Genus Chione J. E. Gray, 1838 accepted as Callista Poli, 1791 (3)
- Genus Clausina T. Brown, 1827 accepted as Venus Linnaeus, 1758
- Genus Cockburnia Zinsmeister, 1984 † (1)
- Genus Colonche Olsson, 1961 accepted as Leukoma Römer, 1857
- Genus Crassivenus Perkins, 1869 accepted as Mercenaria Schumacher, 1817
- Genus Crista Römer, 1857 accepted as Gafrarium Röding, 1798
- Genus Cryptogramma Mörch, 1853 accepted as Anomalocardia Schumacher, 1817
- Genus Cryptonemella Kuroda & Habe, 1951 accepted as Cryptonema Jukes-Browne, 1914
- Genus Cyaneitapes Chiamenti, 1900 accepted as Polititapes Chiamenti, 1900
- Genus Cyclorisma Dall, 1902 † (1)
- Genus Cytherea Röding, 1798 accepted as Periglypta Jukes-Browne, 1914 (1)
- Genus Dione J. E. Gray, 1847 accepted as Hysteroconcha Dall, 1902
- Genus Dosinella Dall, 1902 accepted as Dosinia (Dosinella) Dall, 1902
- Genus Dosinidia Dall, 1902 accepted as Dosinia Scopoli, 1777
- Genus Dosinisca Dall, 1902 accepted as Dosinia Scopoli, 1777
- Genus Dosinorbis Dall, 1902 accepted as Dosinia Scopoli, 1777
- Genus Dosinula H. J. Finlay, 1926 accepted as Dosina J. E. Gray, 1835
- Genus Eocyclina Dall, 1908 accepted as Cyclina Deshayes, 1850
- Genus Ergenica Goncharova, 1981 † (1)
- Genus Eurhomalia [sic] accepted as Eurhomalea Cossmann, 1920
- Genus Eusalacia Cossmann, 1920 accepted as Callanaitis Iredale, 1917
- Genus Eutapes Chiamenti, 1900 accepted as Paphia Röding, 1798
- Genus Euterentia Cossmann, 1920 accepted as Kyrina Jousseaume, 1894
- Genus Exoleta T. Brown, 1827 accepted as Dosinia Scopoli, 1777
- Genus Fallartemis Iredale, 1930 accepted as Dosinia (Fallartemis) Iredale, 1930
- Genus Finlaya Marwick, 1927 † accepted as Marwickia Finlay, 1930 †
- Genus Fossacallista Marwick, 1938 accepted as Notocallista (Fossacallista) Marwick, 1938 †
- Genus Frigichione Fletcher, 1938 † (1)
- Genus Glycydonta Cotton, 1936 † accepted as Timoclea T. Brown, 1827
- Genus Gnidiella Parker, 1949 accepted as Chionopsis Olsson, 1932
- Genus Granithaca Fischer-Piette & Vukadinovic, 1977 accepted as Leukoma Römer, 1857
- Genus Hemitapes Römer, 1864 accepted as Marcia H. Adams & A. Adams, 1857
- Genus Hermione Leach, 1852 accepted as Chamelea Mörch, 1853
- Genus Irona Finlay, 1926 accepted as Irus (Notirus) Finlay, 1928
- Genus Jukesbrownia Cossmann, 1920 accepted as Transennella Dall, 1884
- Genus Katherinella Tegland, 1929 † (1)
- Genus Kereia Marwick, 1927 accepted as Dosinia (Kereia) Marwick, 1927
- Genus Legumen Conrad, 1858 † (3)
- Genus Lepidocardia Dall, 1902 accepted as Callista Poli, 1791
- Genus Levimarcia L. R. Cox, 1927 accepted as Marcia H. Adams & A. Adams, 1857
- Genus Loxo Dailey & Popenoe, 1966 † (1)
- Genus Meridosinia Iredale, 1930 accepted as Dosinia Scopoli, 1777
- Genus Meroena Jukes-Browne, 1908 † (5)
- Genus Metis H. Adams & A. Adams, 1857 accepted as Venerupis Lamarck, 1818
- Genus Murcia Römer, 1857 accepted as Anomalocardia Schumacher, 1817
- Genus Myrsus H. Adams & A. Adams, 1858 accepted as Venerupis Lamarck, 1818
- Genus Naulia Cox, 1952 † (1)
- Genus Nioche Hertlein & A. M. Strong, 1948 accepted as Leukoma Römer, 1857
- Genus Notochione Hertlein & A. M. Strong, 1948 accepted as Leukoma Römer, 1857
- Genus Novathaca Habe, 1951 accepted as Leukoma Römer, 1857
- Genus Omphaloclathrum Mörch, 1853 accepted as Antigona Schumacher, 1817
- Genus Oncophora Rzehak, 1882 † accepted as Rzehakia Korobkov, 1954 †
- Genus Orbiculus Megerle von Mühlfeld, 1811 accepted as Dosinia Scopoli, 1777
- Genus Ortygia T. Brown, 1827 accepted as Chamelea Mörch, 1853
- Genus Paphirus Finlay, 1926 accepted as Venerupis Lamarck, 1818
- Genus Paradione Dall, 1909 † accepted as Pitar (Chionella) Cossmann, 1886 †
- Genus Paragouldia W. Miller, 1985 † accepted as Gouldia (Paragouldia) W. Miller, 1985 †
- Genus Pardosinia Iredale, 1929 accepted as Dosinia Scopoli, 1777
- Genus Parembola Römer, 1857 accepted as Tapes Megerle von Mühlfeld, 1811
- Genus Pasiphae Leach, 1852 accepted as Timoclea T. Brown, 1827
- Genus Pectunculus da Costa, 1778 accepted as Dosinia (Pectunculus) da Costa, 1778
- Genus Petroderma Kuroda, 1945 accepted as Samarangia Dall, 1902
- Genus Phacosoma Jukes-Browne, 1912 accepted as Dosinia (Phacosoma) Jukes-Browne, 1912
- Genus Pitarella K. van W. Palmer, 1927 † accepted as Agriopoma Dall, 1902
- Genus Pitaria Dall, 1902 accepted as Pitar Römer, 1857
- Genus Pitarina Jukes-Browne, 1913 accepted as Pitar (Pitarina) Jukes-Browne, 1913
- Genus Protothaca Dall, 1902 accepted as Leukoma Römer, 1857 (1)
- Genus Psathura Deshayes, 1858 † (1)
- Genus Psephidia Dall, 1902 accepted as Nutricola F. R. Bernard, 1982
- Genus Psephis P. P. Carpenter, 1864 accepted as Nutricola F. R. Bernard, 1982
- Genus Pseudamiantis Kuroda, 1933 † (1)
- Genus Rhabdopitaria K. van W. Palmer, 1927 †
- Genus Rzehakia Korobkov, 1954 † (4)
- Genus Salacia Jukes-Browne, 1914 accepted as Callanaitis Iredale, 1917
- Genus Semelartemis Iredale, 1930 accepted as Dosinia Scopoli, 1777
- Genus Sulcocardia Rovereto, 1898 †
- Genus Textrix Römer, 1857 accepted as Paratapes Stoliczka, 1870
- Genus Thetis C. B. Adams, 1845 accepted as Gouldia C. B. Adams, 1847
- Genus Tinctora Jukes-Browne, 1914 accepted as Transennella Dall, 1884
- Genus Transenella [sic] accepted as Transennella Dall, 1884
- Genus Trigona Megerle von Mühlfeld, 1811 accepted as Gomphina Mörch, 1853
- Genus Trigonocallista Rennie, 1930 † (2)
- Genus Triquetra Blainville, 1829 accepted as Anomalocardia Schumacher, 1817
- Genus Tropithaca Olsson, 1961 accepted as Leukoma Römer, 1857
- Genus Tuangia Marwick, 1927 accepted as Leukoma Römer, 1857
- Genus Urbnisia Goncharova, 1981 † (1)
- Genus Ventricola Römer, 1867 accepted as Venus Linnaeus, 1758
- Genus Venulites Schlotheim, 1813 † accepted as Venus Linnaeus, 1758
- Genus Venusarius Duméril, 1805 accepted as Venus Linnaeus, 1758
- Genus Veremolpa Iredale, 1930 accepted as Timoclea T. Brown, 1827
- Genus Zoreia Brusina, 1907
- 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 (6 636)
- 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