Classification of Squires 1999
Ph. Cnidaria Hatschek 1888
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Cl. Anthozoa Ehrenberg 1834
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Subcl. Zoantharia de Blainville 1830
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Ph. Mollusca Linnaeus 1758 [mollusk]
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Cl. Gastropoda Cuvier 1795 [snail]
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Superor. †Caenogastropoda Cox 1959
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Fm. Campanilidae Douvillé 1904
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Fm. Naticidae Guilding 1834 [moon snail]
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Fm. Turritellidae Lovén 1847 [turret shell]
Subcl. †Heterobranchia Gray 1840
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Or. Heterostropha Fischer 1885
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Fm. Architectonicidae Gray 1850
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G. Architectonica Röding 1798 [sundial]
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Subg. Architectonica (Architectonica) Röding 1798
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†Architectonica (Architectonica) llajasensis Sutherland 1966
Or. Neogastropoda Thiele 1929
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Fm. Buccinidae Rafinesque 1815 [true whelk]
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Fm. Turridae Swainson 1840 [turrid]
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Invalid names: Neritopsina Cox 1960 [empty]
G. Turritella Lamarck 1799 [turret shell]
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†Turritella buwaldana Dickerson 1916
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Invalid names: Turritella subuvasana Nelson 1925 [synonym]
†Turritella meganosensis Clark and Woodford 1927
Invalid names: Turritella susanaensis Nelson 1925 [nomen dubium]
Cl. Bivalvia Linnaeus 1758 [clam]
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Or. Myoida Goldfuss 1820
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Fm. Corbulidae Lamarck 1818
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G. Corbula Bruguière 1789
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Subg. Corbula (Caryocorbula) Gardner 1926
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†Corbula (Caryocorbula) dickersoni Weaver and Van Winkle Palmer 1922
†Corbula (Caryocorbula) parilis Gabb 1864
Or. Nuculoida Dall 1889
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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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†Acila (Truncacila) decisa Conrad 1855
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Invalid names: Nucula (Acila) stillwaterensis Weaver and Van Winkle Palmer 1922 [synonym]
Or. Ostreoida Fërussac 1822 [oyster]
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Fm. †Gryphaeidae Vialov 1936
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G. Pycnodonte Fischer von Waldheim 1835
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Subg. †Pycnodonte (Phygraea) Vyalov 1936
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†Pycnodonte (Phygraea) pacifica Squires and Demetrion 1990
Or. Veneroida Gray 1854
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Fm. Carditidae Fleming 1820
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Fm. Tellinidae Blainville 1814 [tellin clam]
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Ph. Arthropoda Latreille 1829 [arthropod]
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Cl. Malacostraca Latreille 1802
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Ph. Echinodermata Klein 1754
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Cl. Echinoidea Leske 1778 [sea urchin]
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†Venericardia (Pacificor) calafia Stewart 1930
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†Venericardia (Pacificor) calafia susanaensis Verástegui 1953