PaleoDB taxon number: 125121
Full reference: R. Zangerl. 1953. The vertebrate fauna of the Selma Formation of Alabama. Part III. The turtles of the family Protostegidae. Fieldiana: Geology Memoirs 3(3):63-133
Sister taxa: none
Type specimen: CNHM PR129, a partial skeleton. Its type locality is Burkville locality, which is in a Santonian/Campanian marine limestone in the Mooreville Chalk Formation of Alabama.