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Genus: Floyda Webster, 1905 † (DB: 2 SP)
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Floyda concentrica
W.H. Webster, 1905 † (FOSSIL)
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Floyda depressa W.H. Webster, 1906 † =» Floyda concentrica
W.H. Webster, 1905 †
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Floyda gigantea J.W. Hall & R.P. Whitfield, 1873 † =» Floyda concentrica
W.H. Webster, 1905 †
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Naticopsis gigantea J.W. Hall & R.P. Whitfield, 1873 † =» Floyda concentrica
W.H. Webster, 1905 †
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Naticopsis magnifica W.H. Webster, 1905 † =» Floyda concentrica
W.H. Webster, 1905 †
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Floyda magnifica W.H. Webster, 1905 † =» Floyda concentrica
W.H. Webster, 1905 †
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Floyda multisinuata Fenton, 1918 † =» Floyda concentrica
W.H. Webster, 1905 †
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Floyda obliqua
(Spriesterbach, 1919 †) (FOSSIL)
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Pileolus obliquus Spriesterbach, 1919 † =» Floyda obliqua
(Spriesterbach, 1919 †)
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Genus: Palaeotrochus Hall, 1879 † (DB: 1 SP)
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Palaeotrochus kearnyi
(J.W. Hall, 1861 †) (FOSSIL)
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Palaeotrochus kearneyi J.W. Hall, 1861 † =» Palaeotrochus kearnyi
(J.W. Hall, 1861 †)
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Genus: Turbonopsis Grabau & Shimer, 1909 † (DB: 5 SP)
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Turbonopsis apachiensis
Day & Beus, 1982 † (FOSSIL)
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Turbonopsis coronola
(A.H. Clarke & Swartz, 1913 †) (FOSSIL)
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Turbo coronola A.H. Clarke & Swartz, 1913 † =» Turbonopsis coronola
(A.H. Clarke & Swartz, 1913 †)
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Turbonopsis hackberryensis
(W.H. Webster, 1906 †) (FOSSIL)
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Turbo canaliculatus L.A. Reeve, 1848 † =» Turbonopsis hackberryensis
(W.H. Webster, 1906 †)
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Turbonopsis shumardii
(J.W. Hall, 1879 †) (FOSSIL)
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Turbo shumardii J.W. Hall, 1879 † =» Turbonopsis shumardii
(J.W. Hall, 1879 †)
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Turbonopsis spiculatus
(Fenton & Fenton, 1924 †) (FOSSIL)
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Turbo spiculatus Fenton & Fenton, 1924 † =» Turbonopsis spiculatus
(Fenton & Fenton, 1924 †)
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Genus: Westerna Webster, 1905 † (DB: 2 SP)
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Westerna gigantea
(W.H. Webster, 1888 †) (FOSSIL)
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Loxonema gigantea W.H. Webster, 1888 † =» Westerna gigantea
(W.H. Webster, 1888 †)
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Westerna pulchra
Fenton & Fenton, 1924 † (FOSSIL)
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Genus: Westwooditrochus Cook, 1998 † (DB: 1 SP)
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Westwooditrochus westwoodensis
Cook, 1998 † (FOSSIL)
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