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B427 (2019) Description of Two Species of Hoploscaphites

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B427 (2019) 72 pp. Neil H. Landman, W. James Kennedy, Neal L. Larson, Joyce C. Grier, James W. Grier and Tom Linn. Description of two species of Hoploscaphites (Ammonoidea, Ancyloceratina) from the Upper Cretaceous (Lower Maastrichtian) of the U.S. Western Interior.