Classification of Addicott 1973
G. Calyptraea Lamarck 1799
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†Calyptraea diegoana Conrad 1855
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Invalid names: Calyptraea washingtonensis Weaver 1916 [synonym], Galerus excentricus Gabb 1864 [synonym]
G. †Calicantharus Clark 1938
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†Calicantharus branneri Clark and Arnold 1923
†Calicantharus dalli Clark 1918
Subg. Acila (Truncacila) Grant and Gale 1931
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†Acila (Truncacila) muta Clark 1918
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Invalid names: Acila muta markleyensis Clark 1918 [invalid subgroup]
G. Crenomytilus Soot-Ryen 1955
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†Crenomytilus arnoldi Clark 1918
†Crenomytilus expansus Arnold 1907
†Crenomytilus mathewsoni Gabb 1866
G. Amiantis Carpenter 1863
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G. Lucinoma Dall 1901
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Lucinoma acutilineata Conrad 1849
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Invalid names: Cyclas permacra Conrad 1857 [synonym], Pectunculus patulus Conrad 1849 [synonym]
G. Spisula Gray 1837
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†Spisula ramonensis Packard 1916
†Spisula rushi Wagner and Schilling 1923
G. Tellina Linnaeus 1758
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Subg. †Tellina (Olcesia) Addicott 1973
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†Tellina (Olcesia) piercei Arnold 1909
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Invalid names: Macoma nasuta Conrad 1837 [synonym], Tellina nevadensis Anderson and Martin 1914 [synonym], Tellina ocoyana Conrad 1855 [synonym]
†Tellina townsendensis Clark 1925
†Tellina vancouverensis Clark and Arnold 1923
G. Panopea Menard 1807
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Subg. †Panopea (Panopea) Menard 1807
†Panopea ramonensis Clark 1925
Fm. Tellinidae Blainville 1814 [tellin clam]
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G. Heteromacoma Habe 1952
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†Heteromacoma rostellata Clark 1918
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Invalid names: Apolymetis twinensis Durham 1944 [synonym], Apolymetis vancouverensis Weaver 1942 [synonym], Macoma sespeensis Loel and Corey 1932 [synonym], Metis sespeensis Loel and Corey 1932 [synonym], Metis vancouverensis Clark and Arnold 1923 [synonym], Poromya teglandae Weaver 1942 [synonym]
Subg. Pecten (Pecten) Müller 1776
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†Pecten (Pecten) sanctaecruzensis Arnold 1906
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Invalid names: Pecten (Pecten) dickersoni Wagner and Schilling 1923 [synonym]
Subg. Yoldia (Kalayoldia) Grant, IV and Gale 1931
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†Yoldia (Kalayoldia) tenuissima Clark 1918
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Invalid names: Yoldia (Portlandia) oregona Shumard 1858 [synonym]
Subg. Dosinia (Dosinia) Scopoli 1777
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Subg. Neverita (Glossaulax) Pilsbry 1929
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†Neverita (Glossaulax) thomsonae Hickman 1969
Subg. Tellina (Tellinella) Mörch 1853
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†Tellina (Tellinella) tenuilineata Clark 1918
Subg. Miltha (Miltha) Adams and Adams 1857
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†Miltha (Miltha) sanctaecrucis Arnold 1909
Subg. Tellina (Oudardia)
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†Tellina (Oudardia) emacerata Conrad 1849
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Invalid names: Tellina clallamensis Reagan 1908 [synonym], Tellina oregonensis Conrad 1848 [synonym]