Full reference: R. W. Imlay. 1960. Early Cretaceous (Albian) ammonites from the Chitna Valley and Talkeetna Mountains, Alaska. United States Geological Survey Professional Paper 354(D):87-114
Type specimen: USNM 130138, a shell. Its type locality is Alaska, Kennicott Formation, USGS Mes. loc. 9492, which is in an Albian marginal marine sandstone in Alaska.
Ecology: nektonic carnivore
Average measurements (in mm): shell 46.0 x 21.0