Potamites strangulatus
Potamites strangulatus (Cope, 1868)
P. strangulatus is distinguished from other species of Potamites by the following combination of characters: (1) tympanum joined to the surface of the head by a smooth curve; (2) absence of a fold of scales overhanging the tympanum; (3) absence of an auditory meatus; (4) caudal crests poorly…
