Classification of Todd 2001
Cl. Bivalvia Linnaeus 1758 [clam]
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Subcl. Pteriomorphia Beurlen 1944
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Or. Arcoida Stoliczka 1871
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Superfm. Limopsoidea Dall 1895
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Fm. Glycymerididae Newton 1922
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G. Axinactis Mörch 1861
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Subg. Axinactis (Axinactis) Mörch 1861
Subg. Axinactis (Glycymerella) Woodring 1925
G. Bellaxinaea Nicol 1984
G. Tucetona Iredale 1939
Or. Limoida Moore 1952
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Or. Ostreoida Fërussac 1822 [oyster]
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Superfm. Anomioidea Rafinesque 1815
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Fm. Anomiidae Rafinesque 1815
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G. Anomia Linnaeus 1758 [jingle]
G. †Carolia Cantraine 1838
G. Pododesmus Philippi 1837
Fm. Placunidae Gray 1842
Superfm. Dimyoidea Fischer 1886
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Superfm. Ostreoidea Rafinesque 1815
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Fm. Ostreidae Rafinesque 1815 [oyster]
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G. Crassostrea Sacco 1897
G. Dendostrea Swainson 1835
G. Ostreola Monterosato 1884
G. Saccostrea Dolfuss and Dautzenberg 1920
G. Striostrea Vyalov 1936
G. Undulostrea Harry 1985
Superfm. Pectinoidea Rafinesque 1815
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Fm. Propeamussiidae Abbott 1954 [mud scallop]
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G. Cyclopecten Verrill 1897
G. Propeamussium de Gregorio 1884
G. Nucula Lamarck 1799
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Subg. Nucula (Lamellinucula) Schenck 1944
Subg. Nucula (Nucula) Lamarck 1799
G. Anadara Gray 1847 [ark]
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Subg. Anadara (Caloosarca) Olsson 1961
Subg. Anadara (Cunearca) Dall 1898
Subg. Anadara (Diluvarca) Woodring 1925
Subg. Anadara (Esmerarca) Olsson 1961
Subg. Anadara (Grandiarca) Olsson 1961
Subg. Anadara (Larkinia) Reinhart 1935
Subg. †Anadara (Potiarca) Iredale 1939
Subg. †Anadara (Rasia) Gray 1857
Subg. Anadara (Sectiarca) Olsson 1961
Subg. †Anadara (Tosarca) Noda 1965
Or. Mytiloida Rafinesque 1815
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Superfm. Mytiloidea Rafinesque 1815
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Fm. Mytilidae Rafinesque 1815 [mussel]
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G. Amygdalum Megerle 1811
G. Botula Mörch 1853
G. Brachidontes Swainson 1840
G. Crenella Brown 1827
G. Dacrydium Torell 1859
G. Gregariella Monterosato 1883
G. Ischadium Jukes-Browne 1905
G. Lioberus Dall 1898
G. Modiolus Lamarck 1801
G. Mytella Soot-Ryen 1955
G. Mytiloconcha Conrad 1862
G. Mytilus Linnaeus 1758
G. Scolimytilus Olsson 1961
G. Septifer Récluz 1848
Fm. Pectinidae Wilkes 1810 [scallop]
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G. Aequipecten Fischer 1886 [scallop]
G. Amusium Röding 1798
G. Argopecten Monterosato 1889 [calico scallop]
G. Bractechlamys Iredale 1939
G. Caribachlamys Waller 1993
G. Chlamys Röding 1798
G. Delectopecten Stewart 1930
G. Euvola Dall 1898
G. Excellichlamys Iredale 1939
G. Flabellipecten Sacco 1897
G. Laevichlamys Waller 1993
G. †Lepidopecten Woodring 1982
G. Lindapecten Petuch 1988
G. Nodipecten Dall 1898
G. Spathochlamys Waller 1993
Superfm. Arcoidea Lamarck 1809
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Fm. Arcidae Lamarck 1809
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G. Acar Gray 1857 [miniature ark]
G. Arca Linnaeus 1758 [ark]
G. Barbatia Gray 1842
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Subg. Barbatia (Barbatia) Gray 1842
Subg. Barbatia (Cucullaearca) Conrad 1865
Subg. Barbatia (Fugleria) Reinhart 1937
Subg. Barbatia (Obliquarca) Sacco 1898
G. Bathyarca Kobelt 1891
G. Calloarca Gray 1857
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Subg. Calloarca (Calloarca) Gray 1857
Subg. †Calloarca (Taeniarca) Olsson 1965
G. Lunarca Gray 1857
Superfm. Nuculanoidea Adams and Adams 1858
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Fm. Nuculanidae Adams and Adams 1858 [pointed nut clam]
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G. Adrana Adams and Adams 1858
G. †Calorhadia Stewart 1930
G. Costelloleda Hertlein and Strong 1940
G. Jupiteria Bellardi 1875
G. Ledella Verrill and Bush 1897
G. Nuculana Link 1807
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Subg. Nuculana (Politoleda) Hertlein and Strong 1940
Subg. Nuculana (Thestyleda) Iredale 1929
G. Propeleda Iredale 1924
G. Saccella Woodring 1925
Fm. Tindariidae Verrill and Bush 1897
Subcl. Protobranchia Pelseneer 1889
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Or. Nuculoida Dall 1889
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Superfm. Nuculoidea Gray 1824
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Fm. Nuculidae Gray 1824 [nut clam]
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G. Acila Adams and Adams 1858 [divaricate nutclam]
G. Leionucula Quenstedt 1930
G. Varinucula Maxwell 1988
Superfm. Lucinoidea Fleming 1828
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Fm. Ungulinidae Adams and Adams 1857
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G. Microstagon Cossmann 1896
G. Phlyctiderma Dall 1899
G. Timothynus Harris and Palmer 1946
Superfm. Cardioidea Lamarck 1809
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Superfm. Cuspidarioidea Dall 1886
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Superfm. Veneroidea Rafinesque 1815
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Fm. Veneridae Rafinesque 1815 [venus clam]
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G. Anomalocardia Schumacher 1817
G. Chione von Mühlfield 1811
G. Chionista Keen 1958
G. Chionopsis Olsson 1932
G. Cyclinella Dall 1902
G. Dosinia Scopoli 1777
G. Gouldia Adams 1847
G. Hysteroconcha Dall 1902
G. Irus Schmidt 1818
G. Lamelliconcha Dall 1902
G. Lirophora Conrad 1863
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Subg. Lirophora (Lirophora) Conrad 1863
Subg. †Lirophora (Panchione) Olsson 1964
G. Mercenaria Schumacher 1817 [quahog]
G. Parastarte Conrad 1862
G. Periglypta Jukes-Browne 1914
G. Pitar Römer 1857
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Subg. Pitar (Hyphantosoma) Dall 1902
Subg. Pitar (Nanopitar) Rehder 1943
Subg. Pitar (Pitarenus) Rehder and Abbott 1951
G. Protothaca Dall 1902
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Subg. Protothaca (Antinioche) Olsson 1961
Subg. Protothaca (Leukoma) Römer 1857
Subg. Protothaca (Notochione) Hertlein and Strong 1948
Subg. †Protothaca (Tropithaca) Olsson 1961
G. Puberella Fischer-Piette and Vukadinovic 1977
G. Timoclea Brown 1827
G. Transennella Dall 1884
G. Ventricolaria Keen 1954
Superfm. Tellinoidea Blainville 1814
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Fm. Tellinidae Blainville 1814 [tellin clam]
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G. Acorylus Olsson and Harbison 1953
G. Angulus Megerle 1811
G. Arcopagia Leach 1827
G. Cymatoica Dall 1889
G. †Elliptotellina Cossmann 1886
G. Eurytellina Fischer 1887
G. Florimetis Olsson and Harbison 1953
G. Merisca Dall 1900