Emarginachelys cretacea is the earliest described chelydrid of the genus Emarginachelys, known from well preserved fossils from the Maastrichtian stage of the Late Cretaceous of Montana.

Emarginachelys cretacea is the earliest described chelydrid of the genus Emarginachelys, known from well preserved fossils from the Maastrichtian stage of the Late Cretaceous of Montana.