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The heteromorph ammonite Didymoceras cochleatum (Meek and Hayden, 1858), from the Pierre Shale of South Dakota and Wyoming

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

Publication info: New York, NY, American Museum of Natural History, c1999

Holding Institution: American Museum of Natural History Library

Subjects: Ammonoidea Cretaceous Didymoceras cochleatum Mollusks, Fossil Niobrara County Paleontology Pierre Shale South Dakota Wyoming