Classification of Stephenson 1941

G. Cypraea Linnaeus 1758 [cowry]
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†Cypraea nuciformis Stephenson 1941
G. †Paladmete Gardner 1916
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†Paladmete corbuliformis Stephenson 1941
G. †Baculites Lamarck 1799
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Baculites claviformis Stephenson 1941
†Baculites columna Morton 1834
G. †Scaphites Parkinson 1811
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†Scaphites brevis Meek 1876
G. †Gryphaeostrea Conrad 1865
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†Gryphaeostrea vomer Morton 1828
Fm. Olividae Latreille 1825 [olive snail]
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G. †Fulgerca Stephenson 1941
Fm. Trochidae Rafinesque 1815 [top snail]
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G. †Garramites Stephenson 1941
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†Garramites nitidus Stephenson 1941
Fm. Turbinellidae Swainson 1840
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G. †Napulus Stephenson 1941
Superfm. Toxoglossa Troschel 1848
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Fm. Turritidae Swainson 1840 [turrid]
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G. †Lutema Stephenson 1941