Neil H. Landman, W. James Kennedy, Neal L. Larson
American Museum Novitates 2015 (3833), 1-40, (30 April 2015) https://doi.org/10.1206/3833.1
We describe a new species of scaphitid ammonite from the Upper Cretaceous (lower Maastrichtian) of North America. Hoploscaphites sargklofak, n. sp., is endemic to the U.S. Western Interior, but closely resembles H. constrictus Sowerby, 1817, from the Maastrichtian of northern Europe.