Litophragmatoceras incomptum gen. et sp.nov. (Cretaceous Ammonoidea), a cryptic micromorph from the upper Cenomanian of Arizona
Kennedy, W.J., and Cobban, W.A., 1988, Litophragmatoceras incomptum gen. et sp.nov. (Cretaceous Ammonoidea), a cryptic micromorph from the upper Cenomanian of Arizona: Geological Magazine, v. 125, no. 5, p. 535-539.