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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

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By: Kennedy, W. J. (William James) - Landman, Neil H. - Cobban, William Aubrey,

Publication info: New York, N.Y, American Museum of Natural History, c1996

Holding Institution: American Museum of Natural History Library

Subjects: Ammonoidea Coahuilites sheltoni Cretaceous Mexico, Northern Paleontology Sphenodiscus pleurisepta West (U.S.)