Classification of Palmer 1937
G. †Cypraeorbis Conrad 1865
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†Cypraeorbis alabamensis de Gregorio 1890
†Cypraeorbis nuculoides Aldrich 1903
G. Neosimnia Fischer 1884
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†Neosimnia subtruncata Johnson 1899
†Neosimnia texana Johnson 1899
G. †Sulcocypraea Conrad 1865
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†Sulcocypraea kennedyi Harris 1895
†Sulcocypraea vaughani Johnson 1899
G. †Transovula De Gregorio 1880
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Subg. †Transovula (Oxycypraea) Schilder 1924
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†Transovula (Oxycypraea) naviculae Palmer 1937
†Transovula (Oxycypraea) symmetrica Aldrich 1903
†Transovula (Oxycypraea) transovuloides Schilder 1927
G. Turritella Lamarck 1799 [turret shell]
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†Turritella apita de Gregorio 1890
†Turritella obruta Conrad 1833
G. Murex Linnaeus 1758
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Fm. Buccinidae Rafinesque 1815 [true whelk]
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Fm. Cancellariidae Gray 1853
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Fm. Marginellidae Fleming 1828 [margin shell]
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