Landman, Neil H.; Kennedy, W. J. (William James); Cobban, William A., 1916-2015.; Larson, Neal L.
(American Museum of Natural History., 2010)
Scaphitid ammonites (scaphites) are common in the Upper Cretaceous Pierre Shale and Bearpaw Shale of the Western Interior of North America. We redescribe Hoploscaphites nodosus (Owen, 1852) and H. brevis (Meek, 1876) from ...