Classification of Durham 1944
G. Balanophyllia Wood 1844
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†Balanophyllia fulleri Durham 1942
†Balanophyllia teglandae Durham 1942
G. Caryophyllia Lamarck 1801
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†Caryophyllia blakeleyensis Durham 1942
†Caryophyllia woodmanensis Durham 1942
G. Siderastrea Blainville 1830
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†Siderastrea vancouverensis Clark and Arnold 1923
†Siderastrea washingtonensis Durham 1942
G. Trochocyathus Milne-Edwards and Haime 1848
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†Trochocyathus townsendensis Durham 1942
G. Dentalium Linnaeus 1758
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†Dentalium conradi Dall 1909
†Dentalium petricola Dall 1909
†Dentalium porterensis Weaver 1912
Cl. †Pelecypoda Goldfuss 1820
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Invalid names: Corbidae [empty], Gariidae [empty], Solemyacidae H. Adams and Adams 1857 [empty]
Fm. Turritellidae Lovén 1847 [turret shell]
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G. Turritella Lamarck 1799 [turret shell]
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†Turritella blakeleyensis Weaver 1912
†Turritella diversilineata Merriam 1897
†Turritella olympicensis Durham 1944
†Turritella oregonensis Conrad 1849
†Turritella porterensis Weaver 1912
†Turritella wheatlandensis Clark and Anderson 1938
Fm. Acteonidae d'Orbigny 1835
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Fm. Arcidae Lamarck 1809
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G. Arca Linnaeus 1758 [ark]
G. Barbatia Gray 1842
G. Glycymeris Da Costa 1778
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†Glycymeris chehalisensis Weaver 1916
†Glycymeris vancouverensis Clark and Arnold 1923
Fm. Buccinidae Rafinesque 1815 [true whelk]
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G. †Molopophorus Gabb 1869
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†Molopophorus dalli Anderson and Martin 1914
†Molopophorus effingeri Effinger 1938
†Molopophorus fishii Gabb 1866
†Molopophorus gabbi Dall 1909
†Molopophorus newcombei Merriam 1897
†Molopophorus stephensoni Dickerson 1917
Fm. Bursidae Thiele 1925 [frog shell]
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G. †Olequahia Stewart 1927
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†Olequahia lincolnensis Weaver 1916
†Olequahia lorenzana Wagner and Schilling 1923
†Olequahia schencki Durham 1944
Fm. Calyptraeidae Lamarck 1809 [slipper shell]
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G. Calyptraea Lamarck 1799
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†Calyptraea diegoana Conrad 1855
Calyptraea sookensis Clark and Arnold 1923
Fm. Cancellariidae Gray 1853
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G. Cancellaria Lamarck 1799
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†Cancellaria landesi Winkle 1918
†Cancellaria washingtonensis Weaver 1916
Fm. Cardiidae Lamarck 1809 [cockle]
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Fm. Carditidae Fleming 1820
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G. Venericardia Lamarck 1801
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Subg. Venericardia (Cyclocardia) Conrad 1867
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†Venericardia (Cyclocardia) castor Dall 1909
†Venericardia (Cyclocardia) hannai Tegland 1933
†Venericardia (Cyclocardia) hannibali Clark 1925
†Venericardia (Cyclocardia) subtenta Conrad 1849
Fm. Cassididae Adams and Adams 1853
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G. Echinophoria Sacco 1890
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†Echinophoria apta Tegland 1931
†Echinophoria dalli Dickerson 1917
†Echinophoria fax Tegland 1931
†Echinophoria rex Tegland 1931
Fm. Cerithiopsidae Adams and Adams 1853
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Fm. Conidae Fleming 1822 [cone shell]
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Fm. Corbulidae Lamarck 1818
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Fm. Cymatiidae Iredale 1913
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Fm. Cypraeidae Rafinesque 1815 [cowry]
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Fm. Epitoniidae Berry 1910 [wentletrap]
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G. Acrilla Adams and Adams 1860
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Subg. Acrilla (Ferminoscala) Dall 1908
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†Acrilla (Ferminoscala) becki Durham 1937
†Acrilla (Ferminoscala) dickersoni Durham 1937
†Acrilla (Ferminoscala) lincolnensis Weaver 1916
G. Epitonium Bolten 1798
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Subg. Epitonium (Boreoscala) Kobelt 1905
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†Epitonium (Boreoscala) condoni Dall 1909
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†Epitonium (Boreoscala) condoni hadlockense Durham 1937
†Epitonium (Boreoscala) condoni quimperense Durham 1937
†Epitonium (Boreoscala) condoni townsendense Durham 1937
†Epitonium (Boreoscala) condoni woodmanense Durham 1937
G. Opalia Adams and Adams 1853
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Fm. Ficidae Meek 1864 [fig shell]
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G. Ficus Röding 1798
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†Ficus gesteri Wagner and Schilling 1923
†Ficus restorationensis Winkle 1918
Fm. Fissurellidae Fleming 1822
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Fm. Hipponicidae Troschel 1861 [hoof shell]
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Fm. Limidae Rafinesque 1815 [file clam]
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G. Lima Bruguière 1797
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†Lima bela Dickerson 1917
†Lima robertsae Durham 1944
†Lima twinensis Durham 1944
Fm. Limopsidae Dall 1895
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Fm. Mactridae Lamarck 1809
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G. Mactra Linnaeus 1767
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Subg. Mactra (Spisula) Gray 1837
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†Mactra (Spisula) hannibali Clark and Arnold 1923
†Mactra (Spisula) packardi Dickerson 1917
†Mactra (Spisula) pittsburgensis Clark 1925
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†Mactra (Spisula) pittsburgensis frustra Tegland 1933
†Mactra (Spisula) ramonensis Packard and Clark 1915
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†Mactra (Spisula) ramonensis attenuata Clark 1918
†Mactra (Spisula) sammamishensis Durham 1944
Fm. Marginellidae Fleming 1828 [margin shell]
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G. Marginella Lamarck 1799
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†Marginella instabilata Hanna 1924
†Marginella shepardae Tegland 1933
Fm. Muricidae Rafinesque 1815 [murex snail]
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Fm. Mytilidae Rafinesque 1815 [mussel]
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G. Mytilus Linnaeus 1758
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†Mytilus sammamishensis Weaver 1912
†Mytilus snohomishensis Weaver 1912
†Mytilus stillaguamishensis Weaver 1912
Fm. Naticidae Guilding 1834 [moon snail]
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G. Natica Scopoli 1777
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Subg. Natica (Natica) Scopoli 1777
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†Natica (Natica) teglandae Hanna and Hertlein 1938
†Natica (Natica) weaveri Tegland 1933
†Natica oligocenica Winkle 1918
G. Polinices Monfort 1810 [moon snail]
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Subg. Polinices (Euspira) Agassiz 1837
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†Polinices (Euspira) rectus Tegland 1933
†Polinices (Euspira) victoriana Clark and Arnold 1923
†Polinices lincolnensis Weaver 1916
Fm. Neritidae Rafinesque 1815
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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 alkiensis Clark 1925
†Nuculana astoriana Henderson 1920
†Nuculana lincolnensis Weaver 1916
†Nuculana merriami Dickerson 1917
†Nuculana ochsneri Anderson and Martin 1914
†Nuculana washingtonensis Weaver 1916
G. Yoldia Möller 1842
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†Yoldia blakeleyensis Durham 1944
†Yoldia chehalisensis Arnold 1908
†Yoldia olympiana Clark 1925
†Yoldia temblorensis Anderson and Martin 1914
Fm. Nuculidae Gray 1824 [nut clam]
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G. Acila Adams and Adams 1858 [divaricate nutclam]
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Subg. Acila (Acila) Adams and Adams 1858
Subg. Acila (Truncacila) Grant and Gale 1931
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†Acila (Truncacila) muta Clark 1918
†Acila (Truncacila) nehalemensis Hanna 1924
†Acila (Truncacila) nelsoni Clark 1925
†Acila (Truncacila) pugetensis Clark 1925
†Acila (Truncacila) shumardi Dall 1909
Fm. Olividae Latreille 1825 [olive snail]
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Fm. Ostreidae Rafinesque 1815 [oyster]
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Fm. Pandoridae Rafinesque 1815
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G. Pandora Bruguière 1797
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†Pandora vanwinkleae Tegland 1933
†Pandora washingtonensis Weaver 1916
Fm. Pectinidae Wilkes 1810 [scallop]
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G. Palliolum Monterosato 1884
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G. Pecten Müller 1776
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Fm. Periplomatidae Dall 1895
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Fm. Planorbidae Rafinesque 1815
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Fm. Pyramidellidae Gray 1840
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G. Odostomia Fleming 1817
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G. Pyramidella Lamarck 1799
Fm. †Pyrenidae Suter 1909
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Fm. Ringiculidae Philippi 1853
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Fm. Scaphandridae Sars 1878
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G. Scaphander Monfort 1810
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†Scaphander gordoni Tegland 1933
†Scaphander stewarti Durham 1944
†Scaphander washingtonensis Tegland 1933
Fm. Solenidae Lamarck 1809
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G. Solen Linnaeus 1758
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Subg. †Solen (Plectosolen) Conrad 1866
†Solen clallamensis Clark and Arnold 1923
†Solen lincolnensis Weaver 1916
Fm. Strombidae Rafinesque 1815 [true conch]
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Fm. Tellinidae Blainville 1814 [tellin clam]
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G. Tellina Linnaeus 1758
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†Tellina ocoyana Conrad 1855
†Tellina pittsburgensis Clark 1925
†Tellina townsendensis Clark 1925
†Tellina woodmanensis Durham 1944
Fm. Thraciidae Stoliczka 1870
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G. Thracia Blainville 1824
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†Thracia condoni Dall 1909
†Thracia gibsonensis Van Winkle 1918
†Thracia schencki Teglund 1933
Thracia trapezoides Conrad 1849
Fm. Thyasiridae Dall 1901
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Fm. Trichotropidae Gray 1850
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Fm. Trochidae Rafinesque 1815 [top snail]
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G. †Turcicula Koken 1900
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†Turcicula arnoldi Durham 1944
†Turcicula columbiana Dall 1909
†Turcicula turbonata Clark 1932
†Turcicula washingtoniana Dall 1909
Fm. Turbinidae Rafinesque 1815
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Fm. Turridae Swainson 1840 [turrid]
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G. Aforia Dall 1889 [aforia]
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†Aforia campbelli Durham 1944
†Aforia clallamensis Weaver 1916
†Aforia packardi Weaver 1916
G. Clavatula Lamarck 1801
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G. Clavus Monfort 1810
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G. †Nekewis Stewart 1927
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†Nekewis nehalemensis Anderson and Martin 1914
†Nekewis scowensis Durham 1944
G. †Priscofusus Conrad 1865
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†Priscofusus chehalisensis Weaver 1912
†Priscofusus foxi Durham 1944
†Priscofusus hannibali Clark and Arnold 1923
†Priscofusus stewarti Tegland 1933
G. Spirotropis Sars 1878
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†Spirotropis bainbridgensis Durham 1944
†Spirotropis campi Durham 1944
†Spirotropis dickersoni Weaver 1916
G. Suavodrillia Dall 1918
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†Suavodrillia hertleini Durham 1944
†Suavodrillia thurstonensis Weaver 1916
†Suavodrillia worcesteri Winkle 1918
G. †Surculites Conrad 1865
G. Turricula Schumacher 1817
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†Turricula beanensis Durham 1944
†Turricula bremertonensis Durham 1944
†Turricula mclellani Tegland 1933
Fm. Ungulinidae Adams and Adams 1857
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Fm. Veneridae Rafinesque 1815 [venus clam]
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G. Chione von Mühlfield 1811
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†Chione carmanahensis Clark 1925
†Chione cathcartensis Weaver 1912
†Chione clallamensis Reagan 1909
G. Macrocallista Meek 1876
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†Macrocallista pittsburgensis Dall 1900
†Macrocallista weaveri Clark 1918
G. Marcia Adams and A. 1857
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Subg. †Marcia (Mercimonia) Dall 1902
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†Marcia (Mercimonia) angustifrons Conrad 1849
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†Marcia (Mercimonia) angustifrons brevilineata Conrad 1849
Fm. Volutidae Rafinesque 1815 [volute]
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G. Pitaria Roemer 1857
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Subg. Pitaria (Katherinella) Tegland 1929
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†Pitaria (Katherinella) arnoldi Weaver 1916
†Pitaria (Katherinella) californica Clark 1918
†Pitaria lorenzana Clark 1918
Fm. Cyrenidae Gray 1840
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Fm. †Crepidulidae
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G. Crepidula Lamarck 1799
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†Crepidula pileum Gabb 1864
†Crepidula sookensis Clark and Arnold 1923
†Crepidula ungana Dall 1908
Fm. Neptuneidae Stimpson 1865
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G. Ancistrolepis Dall 1895
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†Ancistrolepis landesi Tegland 1933
†Ancistrolepis packardi Durham 1944
G. †Bruclarkia Trask 1926
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†Bruclarkia acuminatum Anderson and Martin 1914
†Bruclarkia blakeleyensis Durham 1944
†Bruclarkia columbianum Anderson and Martin 1914
†Bruclarkia fulleri Durham 1944
†Bruclarkia seattlensis Durham 1944
†Bruclarkia thor Tegland 1931
†Bruclarkia yaquinanum Anderson and Martin 1914
G. Siphonalia Adams 1863
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†Siphonalia hadlockensis Durham 1944
†Siphonalia teglandae Durham 1944
Subg. Ringicula (Ringiculella) Sacco 1892
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†Ringicula (Ringiculella) clarki Durham 1944
Fm. Saxicavidae Swainson 1835
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Subg. Nucula (Acila) Adams and Adams 1858 [divaricate nutclam]
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†Nucula (Acila) gettysburgensis Regan 1909
Fm. Acmaeidae Forbes 1850
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G. Acmaea Eschscholtz 1830 [limpet]
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†Acmaea oakvillensis Winkle 1918
†Acmaea simplex Dickerson 1917
†Acmaea sookensis Clark and Arnold 1923
Fm. Cerithiidae Fleming 1822 [cerith snail]
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Subg. Pitaria (Lamelliconcha) Dall 1902
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†Pitaria (Lamelliconcha) clarki Dickerson 1917
Subg. Pecten (Propeamusium) Dall 1886
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†Pecten (Propeamusium) clallamensis Arnold 1906