Classification of Scott 1970
Fm. Turritellidae Lovén 1847 [turret shell]
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G. Turritella Lamarck 1799 [turret shell]
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†Turritella belviderei Cragin 1897
†Turritella kansasensis Meek 1871
Fm. Carditidae Fleming 1820
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†Engonoceras belviderense Cragin 1894
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Invalid names: Engonoceras uddeni Cragin 1900 [synonym]