Fig. 6 in Cranial morphology, systematics and succession of beavers from the middle Miocene Valentine Formation of Nebraska, USA

Fig. 6. The beavers from the middle Miocene Valentine Formation of Nebraska, USA. A. Prodipoides burgensis (Korth, 2002). B. Eucastor tortus (Leidy, 1858). Left mandibles in lateral view. A. FAM 64857, from Crookston Bridge Member. B. FAM 64966, from the Devil's Gulch Member.