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Genus: Ammonitella J.G. Cooper, 1868 (DB: 1 SP)
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Ammonitella yatesii
J.G. Cooper, 1869
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Genus: Glyptostoma T.B. Bland & W.G. Binney, 1873 (DB: 2 SP)
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Glyptostoma gabrielense
H.A. Pilsbry, 1938
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Glyptostoma newberryanum
(W.G. Binney, 1858)
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Genus: Megomphix F.C. Baker, 1930 (DB: 3 SP)
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Megomphix californicus
A.G. Smith, 1960
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Megomphix hemphilli
(W.G. Binney, 1879)
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Megomphix lutarius
H.B. Baker, 1932
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Genus: Polygyrella W.G. Binney, 1863 (DB: 1 SP)
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Polygyrella polygyrella
(T.B. Bland & J.G. Cooper, 1861)
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Genus: Polygyroidea H.A. Pilsbry, 1930 (DB: 1 SP)
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Polygyroidea harfordiana
(J.G. Cooper, 1870)
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