Classification of Hertlein and Grant 1972

G. Modiolus Lamarck 1801
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Modiolus rectus Conrad 1837
G. Cyclopecten Verrill 1897
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Cyclopecten pernomus Hertlein 1935
G. Irusella Hertlein and Grant 1972
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G. Sphenia Turton 1822
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†Sphenia luticola Valenciennes 1846
Fm. Arcidae Lamarck 1809
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G. Anadara Gray 1847 [ark]
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†Anadara trilineata Conrad 1856
G. Arca Linnaeus 1758 [ark]
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Subg. Arca (Arca) Linnaeus 1758
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†Arca (Arca) sisquocensis Reinhart 1937
G. Barbatia Gray 1842
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Subg. Barbatia (Fugleria) Reinhart 1937
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Fm. Glycymerididae Newton 1922
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G. Glycymeris Da Costa 1778
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Subg. Glycymeris (Axinola) Hertlein and Grant 1972
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Invalid names: Glycymeris coalingensis Arnold 1909 [synonym]
Fm. Mytilidae Rafinesque 1815 [mussel]
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G. Aeidimytilus Olsson 1961
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G. Crenella Brown 1827
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Crenella inflata Carpenter 1864
G. Gregariella Monterosato 1883
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Gregariella chenui Récluz 1842
G. Lithophaga Röding 1798
G. Mytilus Linnaeus 1758
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Subg. Mytilus (Crenomytilus) Soot-Ryen 1955
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Subg. Mytilus (Mytilus) Linnaeus 1758
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Fm. Nuculanidae Adams and Adams 1858 [pointed nut clam]
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G. Nuculana Link 1807
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Subg. Nuculana (Nuculana) Link 1807
Subg. Nuculana (Saccella) Woodring 1925
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Fm. Nuculidae Gray 1824 [nut clam]
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G. Acila Adams and Adams 1858 [divaricate nutclam]
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Subg. Acila (Truncacila) Grant and Gale 1931
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G. Nucula Lamarck 1799
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Subg. Nucula (Ennucula) Iredale 1931
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Nucula (Ennucula) balboana Hertlein and Grant 1972
Subg. Nucula (Lamellinucula) Schenck 1944
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Subg. Yoldia (Kalayoldia) Grant, IV and Gale 1931
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