Classification of Hickman 1980
Subcl. †Opisthobranchia Milne-Edwards 1848
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Fm. Conidae Fleming 1822 [cone shell]
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Subcl. Prosobranchia Milne-Edwards 1848
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Or. Archaeogastropoda Thiele 1925
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Superfm. Patellacea Rafinesque 1815
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Fm. Trochidae Rafinesque 1815 [top snail]
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Subfm. Margaritinae Stoliczka 1868
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G. Bathybembix Crosse 1892
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†Bathybembix arnoldi Durham 1944
†Bathybembix columbiana Dall 1909
†Bathybembix nitor Hickman 1980
†Bathybembix santacruzana Arnold 1908
†Bathybembix turbonata Clark 1932
†Bathybembix washingtoniana Dall 1909
G. Margarites Gray 1847
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Subg. Margarites (Margarites) Gray 1847
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†Margarites (Margarites) chappelli Durham 1944
Margarites (Margarites) groenlandicus Gmelin 1791
†Margarites (Margarites) sericeus Hickman 1980
Or. Mesogastropoda Thiele 1925
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Invalid names: Calyptraeacea Lamarck 1809 [empty], Cymatiacea [empty], Epitoniacea Berry 1910 [empty], Eulimacea [empty], Naticacea Forbes 1838 [empty], Tonnacea Suter 1913 [empty], Turritellacea Clarck 1851 [empty]
Or. Neogastropoda Thiele 1929
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Superfm. Buccinacea Rafinesque 1815
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Fm. Buccinidae Rafinesque 1815 [true whelk]
Fm. Nassariidae Iredale 1916
Superfm. Conacea Rafinesque 1815
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Superfm. Volutacea Rafinesque 1815
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Fm. Olividae Latreille 1825 [olive snail]
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Invalid names: Cancellariacea [empty]
Fm. Turriculidae Blainville 1824
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G. †Acamptogenotia Rovereto 1899
G. Comitas Finlay 1926
G. †Turrinosyrinx Hickman 1976
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†Turrinosyrinx nodifera Hickman 1976
†Turrinosyrinx packardi Weaver 1916
Subg. †Comitas (Boreocomitas)
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†Comitas (Boreocomitas) monile Hickman 1976
†Comitas (Boreocomitas) oregonensis Hickman 1976
Subg. †Acamptogenotia (Acamptogenotia) Rovereto 1899
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†Acamptogenotia (Acamptogenotia) nodulosa Hickman 1976
†Acamptogenotia (Acamptogenotia) tessellata Hickman 1976
Subg. Bonellitia (Bonellitia) Jousseaume 1887
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†Bonellitia (Bonellitia) smithwickensis Hickman 1980