Classification of Grant, IV and Gale 1931
G. Dentalium Linnaeus 1758
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Dentalium neohexagonum Sharp and Pilsbry 1897
Dentalium pretiosum Nuttall in Sowerby 1860
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Invalid names: Dentalium indianorum Carpenter 1864 [synonym]
Dentalium semistriatum Turton 1819
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Dentalium semistriatum semipolitum Broderip and Sowerby 1829
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Invalid names: Dentalium liratum Carpenter 1855 [synonym], Dentalium lirulatum Mörch 1861 [synonym]
G. Ranella Lamarck 1816
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G. Turritella Lamarck 1799 [turret shell]
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Turritella cooperi Carpenter 1864
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Invalid names: Turritella cooperi fernandoensis Arnold 1907 [invalid subgroup], Turritella nova Nomland 1916 [synonym]
G. Cancellaria Lamarck 1799
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Cancellaria cooperi Gabb 1865
†Cancellaria fergusoni Carson 1926
†Cancellaria tritonidea Gabb 1866
G. Clavus Monfort 1810
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G. Kelletia Fischer 1884
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G. Mangelia Loven 1846
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Subg. Mangelia (Mangelia) Grant, IV and Gale 1931
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Mangelia (Mangelia) hexagona Gabb 1865
Mangelia (Mangelia) merita Hinds 1843
G. Mitrella Risso 1826
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G. Moniliopsis Conrad 1865
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G. Purpura Bruguière 1789
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Subg. Purpura (Centrifuga)
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Purpura (Centrifuga) centrifuga Hinds 1844
Purpura (Centrifuga) leeana Dall 1890
G. Spirotropis Sars 1878
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Subg. Spirotropis (Antiplanes)
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Spirotropis (Antiplanes) bulimoides Dall 1919
Spirotropis (Antiplanes) perversa Gabb 1865
†Spirotropis kincaidi Weaver 1916
G. †Surculites Conrad 1865
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G. Ostrea Linnaeus 1758
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†Ostrea atwoodi Gabb 1866
Ostrea californica Mareon 1858
†Ostrea erici Hertlein 1929
†Ostrea heermani Conrad 1855
Ostrea lurida Carpenter 1864
Ostrea palmula Carpenter 1857
†Ostrea tayloriana Gabb 1866
G. Mactra Linnaeus 1767
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Fm. Arcidae Lamarck 1809
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G. Arca Linnaeus 1758 [ark]
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Subg. Arca (Arca) Linnaeus 1758
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Arca (Arca) formosa Sowerby 1833
Arca (Arca) grandis Broderip and Sowerby 1829
Arca (Arca) perlabiata Grant, IV and Gale 1931
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Invalid names: Arca (Scapharca) labiata Sowerby 1833 [replaced]
†Arca (Arca) trilineata Conrad 1856
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†Arca (Arca) trilineata calcarea Grant, IV and Gale 1931
Invalid names: Arca canalis Conrad 1856 [synonym], Arca schizotoma Dall 1898 [synonym], Arca sulcicosta Gabb 1866 [synonym]
Arca (Arca) tuberculosa Sowerby I 1833
Subg. Arca (Barbatia) Gray 1842
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Arca (Barbatia) reeveana d'Orbigny 1846
†Arca (Barbatia) reticulata Gmelin 1792
Subg. Arca (Navicula) Blainville 1825
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Arca (Navicula) pacifica Sowerby 1833
†Arca (Navicula) terminumbonis Grant, IV and Gale 1931
Subg. Arca (Trisidos) Ršding 1798
G. Glycymeris Da Costa 1778
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Glycymeris corteziana Dall 1916
†Glycymeris grewingki Dall 1909
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Invalid names: Glycymeris coalingensis Arnold 1909 [synonym], Glycymeris conradi Whitfield 1885 [synonym], Glycymeris gabbi Dall 1909 [synonym], Glycymeris larvula Hanna 1924 [synonym]
Glycymeris inaequalis Sowerby 1832
†Glycymeris kashewarowi Grewingk 1848
Glycymeris maculata Broderip 1832
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Invalid names: Glycymeris (Glycymeris) gigantea Reeve 1843 [synonym]
Glycymeris multicostata Sowerby 1833
Fm. Nuculanidae Adams and Adams 1858 [pointed nut clam]
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G. Nuculana Link 1807
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Nuculana acuta Conrad 1832 [pointed nut clam]
Nuculana cellulita Dall 1896
Nuculana fossa Baird 1863
Nuculana hamata Carpenter 1864
†Nuculana orcutti Arnold 1908
Nuculana oxia Dall 1916
Nuculana penderi Dall and Bartsch 1910
Nuculana taphria Dall 1896
†Nuculana whitmani Dall 1909
Nuculana williamettensis Shumard 1858
G. Yoldia Möller 1842
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Subg. Yoldia (Kalayoldia) Grant, IV and Gale 1931
Yoldia cooperi Gabb 1865
†Yoldia oregona Shumard 1858
Fm. Nuculidae Gray 1824 [nut clam]
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G. Nucula Lamarck 1799
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Subg. Nucula (Acila) Adams and Adams 1858 [divaricate nutclam]
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†Nucula (Acila) blancoensis Howe 1922
Nucula (Acila) castrensis Hinds 1843
†Nucula (Acila) ermanni Girard 1843
Nucula (Acila) semirostrata Grant, IV and Gale 1931
Subg. Nucula (Nucula) Lamarck 1799
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Nucula (Nucula) exigua Sowerby 1833
Nucula (Nucula) tenuis Montagu 1808
†Nucula (Nucula) townsendi Dall 1909
Fm. Pectinidae Wilkes 1810 [scallop]
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G. Pecten Müller 1776
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Subg. Pecten (Pallium) Schumacher 1817
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†Pecten (Pallium) hamlini Arnold 1906
Pecten (Pallium) swiftii Bernardi 1858
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†Pecten (Pallium) swiftii etchegoini Anderson 1905
†Pecten (Pallium) swiftii kindlei Dall 1920
†Pecten (Pallium) swiftii nutteri Arnold 1906
Subg. Pecten (Pecten) Müller 1776
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†Pecten (Pecten) bartschi Arnold 1906
Pecten (Pecten) beringianus Middendorff 1849
†Pecten (Pecten) dallasi Jordan and Hertlein 1926
Pecten (Pecten) hastatus Sowerby 1842
Pecten (Pecten) islandicus Müller 1776
Pecten (Pecten) lioicus Dall 1907
Pecten (Pecten) multirugosus Gale 1928
Subg. Pecten (Propeamussium) de Gregorio 1884
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Pecten hindsi Carpenter 1864
Fm. Philobryidae Bernard 1897
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Fm. Pinnidae Leach 1819
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G. Pinna Linnaeus 1758
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Subg. Pinna (Atrina) Gray 1842
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†Pinna (Atrina) alamadensis Yates in Cooper 1888
†Pinna (Atrina) bicuneata Nomland 1917
Subg. Pinna (Pinna) Linnaeus 1758
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†Pinna (Pinna) latrania Hanna 1926
†Pinna (Pinna) mendenhalli Hanna 1926
Fm. Solemyidae Adams and Adams 1857 [Awning Clam]
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Subg. Pecten (Patinopecten) Dall 1898
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†Pecten (Patinopecten) healeyi Arnold 1906
Subg. Thais (Stramonita) Schumacher 1817
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†Thais (Stramonita) imperialis Dall 1908
Subg. Nassarius (Schizopyga) Conrad 1856
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Subg. Corbula (Corbula) Bruguière 1798
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†Corbula (Corbula) gibbiformis Grant, IV and Gale 1931
Subg. Pecten (Aequipecten) Fischer 1886 [scallop]
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†Pecten (Aequipecten) deserti Conrad 1855
†Pecten (Aequipecten) discus Conrad 1857
†Pecten (Aequipecten) eldridgei Arnold 1906
Pecten (Aequipecten) hallae Dall 1921
†Pecten (Aequipecten) pabloensis Conrad 1857
Pecten (Aequipecten) tumbezensis d'Orbigny 1846
Subg. Pecten (Janira) Schumacher 1817
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Subg. Polinices (Neverita) Risso 1826
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Polinices (Neverita) reclusianus Deshayes 1839
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Polinices (Neverita) reclusianus callosa Gabb 1866
Cryptomya californica Conrad 1837
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Invalid names: Cryptomya magna Dall 1921 [synonym], Cryptomya oregonensis Dall 1909 [synonym], Cryptomya ovalis Conrad 1856 [synonym], Cryptomya quadrata Arnold 1909 [synonym], Cryptomya washingtoniana Weaver 1912 [synonym], Macoma kerica Hendrickson 1928 [synonym], Mya inopia Hanna 1924 [synonym]
Subg. Venus (Chione) von Mühlfield 1811
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Venus (Chione) succincta Valenciennes 1821
Subg. Lucina (Myrtea) Turton 1822
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Lucina (Myrtea) acutilineata Conrad 1849
Lucina (Myrtea) nuttallii Conrad 1837
Subg. Laevicardium (Laevicardium) Swainson 1840
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Laevicardium (Laevicardium) substriatum Conrad 1837
Subg. Tegula (Chlorostoma) Swainson 1840
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Tegula (Chlorostoma) gallina Forbes 1850
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Invalid names: Trochus (Monodonta) pyriformis Gould 1853 [synonym]
Tegula (Chlorostoma) ligulata Menke 1850
Cancellaria obesa Sowerby 1832
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†Cancellaria obesa planospira Grant, IV and Gale 1931
Subg. Laevicardium (Trachycardium) Mörch 1853
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Invalid names: Cardium (Granocardium) Gabb 1869 [synonym]
Tellina idae Dall 1891
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Invalid names: Tellina nevadensis Anderson and Martin 1914 [synonym]
Subg. Laevicardium (Cerastoderma) Mörch 1853
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Laevicardium (Cerastoderma) corbis Martyn 1784
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Subg. Clavus (Cymatosyrinx) Dall 1889
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Clavus (Cymatosyrinx) pallidus Sowerby 1833
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Invalid names: Drillia empyrosia Dall 1899 [synonym]