On the supposed presence of Prognathodon solvayi in the Demopolis Chalk

While reporting on the mosasaurid fauna of the upper Demopolis Chalk of western Alabama and northeastern Mississippi, Derstler (1988) noted the presence of numerous remains of Plioplatecarpus sp. and Mosasaurus conodon, and a single isolated tooth of Prognathodon cf. Prognathodon solvayi. These remains are of Late Campanian age, originating from within a few meters of the lower boundary of the Bluffport Marl Member.