The Maastrichtian ammonites Coahuilites sheltoni Böse, 1928, and Sphenodiscus pleurisepta (Conrad, 1857), from the uppermost Pierre shale and basal Fox Hills formation of Colorado and Wyoming. American Museum novitates ; no. 3186

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Date

1996

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New York, N.Y. : American Museum of Natural History

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14 p. : ill. (some col.) ; 26 cm.
Includes bibliographical references (p. 13-14).

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