Classification of Turner 1938
Cl. Scaphopoda Bronn 1862 [tusk shell]
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Cl. Gastropoda Cuvier 1795 [snail]
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Fm. Acteonidae d'Orbigny 1835
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Fm. Buccinidae Rafinesque 1815 [true whelk]
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G. Buccinofusus Conrad 1868
G. Pseudoliva Swainson 1840
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†Pseudoliva dilleri Dickerson 1914
†Pseudoliva umpquaensis Turner 1938
G. Siphonalia Adams 1863
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Fm. Calyptraeidae Lamarck 1809 [slipper shell]
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Fm. Cassididae Adams and Adams 1853
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Fm. Cerithiidae Fleming 1822 [cerith snail]
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G. †Benoistia Cossmann 1899
G. †Potamides Brongniart 1810
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†Potamides carbonicola Cooper 1894
†Potamides lamarcki Brongniart 1810
†Potamides lewisiana Weaver 1912
Fm. Cymatiidae Iredale 1913
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Fm. Fasciolariidae Gray 1853
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G. Latirus Monfort 1810
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G. †Streptochetus Cossmann 1901
G. †Whitneyella Stewart 1927
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†Whitneyella coosensis Turner 1938
†Whitneyella meganosensis Turner 1938
†Whitneyella oregonensis Turner 1938
†Whitneyella sinuata Gabb 1864
Fm. Ficidae Meek 1864 [fig shell]
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G. †Ficopsis Conrad 1866
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†Ficopsis cowlitzensis Weaver 1912
†Ficopsis meganosensis Clark and Woodford 1927
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†Ficopsis meganosensis packardi Merriam and Turner 1937
Fm. Mitridae Swainson 1831 [mitre shell]
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G. Mitra Lamarck 1798
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†Mitra cretacea Gabb 1864
†Mitra douglasensis Turner 1938
†Mitra washingtoniana Weaver 1912
Fm. Muricidae Rafinesque 1815 [murex snail]
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Fm. Naticidae Guilding 1834 [moon snail]
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G. †Amaurellina Fischer 1885
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Subg. †Amaurellina (Euspirocrommium) Sacco 1890
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†Amaurellina (Euspirocrommium) clarki Stewart 1927
†Amaurellina hendoni Turner 1938
G. †Ampullina Férussac 1822
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G. †Cernina Gray 1842
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G. Polinices Monfort 1810 [moon snail]
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†Polinices hornii Gabb 1864
†Polinices weaveri Dickerson 1915
Fm. Turbinidae Rafinesque 1815
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G. Homalopoma Carpenter 1864
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†Homalopoma umpquaensis Merriam and Turner 1937
†Homalopoma wattsi Dickerson 1916
Fm. Turridae Swainson 1840 [turrid]
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G. Turricula Schumacher 1817
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†Turricula crenatospira Cooper 1894
Turricula flammea Schumacher 1817
Fm. Turritellidae Lovén 1847 [turret shell]
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G. Turritella Lamarck 1799 [turret shell]
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†Turritella andersoni Dickerson 1916
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†Turritella andersoni comstockensis Turner 1938
†Turritella andersoni glidensis Turner 1938
†Turritella bramkampi Merriam and Turner 1937
†Turritella buwaldana Dickerson 1916
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†Turritella buwaldana coosensis Turner 1938
†Turritella buwaldana crooki Merriam and Turner 1937
†Turritella meganosensis Clark and Woodford 1927
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†Turritella meganosensis protumescens Merriam and Turner 1937
†Turritella merriami Dickerson 1913
†Turritella uvasana Conrad 1855
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†Turritella uvasana hendoni Turner 1938
†Turritella uvasana stewarti Turner 1938
Fm. Volutidae Rafinesque 1815 [volute]
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Invalid names: Alectrionidae [empty], Crepidulidae [empty]
Cl. †Pelecypoda Goldfuss 1820
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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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†Nuculana cowlitzensis Weaver and Palmer 1922
†Nuculana fresnoensis Dickerson 1916
†Nuculana gabbi Conrad 1866
Fm. Anomiidae Rafinesque 1815
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Fm. Cardiidae Lamarck 1809 [cockle]
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G. †Plagiocardium Cossmann 1866
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Subg. †Plagiocardium (Schedocardia) Stewart 1930
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†Plagiocardium (Schedocardia) brewerii Gabb 1864
Fm. Carditidae Fleming 1820
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G. Venericardia Lamarck 1801
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†Venericardia aragonia Arnold and Hannibal 1914
†Venericardia hornii Gabb 1864
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†Venericardia hornii clarki Weaver and Palmer 1930
†Venericardia hornii lutmani Turner 1938
†Venericardia planicosta Lamarck 1801
Fm. Corbiculidae Gray 1847
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Fm. Crassatellidae Férussac 1822
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Fm. Cuspidariidae Dall 1886
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Fm. Lucinidae Fleming 1828
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Fm. Ostreidae Rafinesque 1815 [oyster]
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†Venericardia (Venericor) hornii Gabb 1864
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†Venericardia (Venericor) hornii calafia Stewart 1930
Fm. Glycimeridae Bronn 1849
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G. Glycimeris Da Costa 1778
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†Glycimeris eocenica Weaver 1912
†Glycimeris fresnoensis Dickerson 1916
†Glycimeris perrini Dickerson 1916
†Glycimeris sagittatus Gabb 1864