PaleoDB taxon number: 340526
Full reference: W. J. Kennedy, W. A. Cobban, and N. H. Landman. 1996. New records of acanthoceratid ammonoids from the Upper Cenomanian of South Dakota. American Museum Novitates 3161:1-18
Type specimen: AMNH 44332, a shell. Its type locality is AMNH 3155, Belle Fourche Reservoir, Butte, which is in a Cenomanian marine shale/limestone in the Greenhorn Limestone Formation of South Dakota.
Ecology: fast-moving nektonic carnivore
Average measurements (in mm): shell width 26.2, shell diameter 37.4