PaleoDB taxon number: 145275
Full reference: N. H. Landman and K. M. Waage. 1993. Scaphitid ammonites of the Upper Cretaceous (Maastrichtian) Fox Hills Formation in South Dakota and Wyoming. Bulletin of the American Museum of Natural History 215:1-257
Type specimen: YPM 23052, a shell. Its type locality is Locality 305, south of Eagle Butte, which is in a Maastrichtian marine siliciclastic in the Fox Hills Formation of South Dakota.
Ecology: fast-moving nektonic carnivore