Fig. 6. Isotemnid foot. AMNH 28690. A in Morphological Diversity in the Postcranial Skeleton of Casamayoran (?Middle to Late Eocene) Notoungulata and Foot Posture in Notoungulates

Fig. 6. Isotemnid foot. AMNH 28690. A, Dorsal view of pes; B, astragalus in plantar view (left) and lateral view (right); C, calcaneum in dorsal view (left) and lateral view (right); D, line drawing illustrating maximum dorsiflexion of the upper ankle joint (left) and maximum plantarflexion (right); E, posterior view of upper ankle joint at maximum plantarflexion, showing the exposed superior astragalar foramen and groove for the tendon of the flexor hallucis longus. Abbreviations: cu, cuboid; dp, dorsal; ect f, ectal facet; ent, entocuneiform; fib, fibula; fib f, fibular facet; flx g, groove for the tendon of the flexor hallucis longus; med p, medial process; nav, navicular; nav f, navicular facet; plnt ast f, plantar astragalar foramen; pp, peroneal process; ps, peroneal shelf; sup ast f, superior astragalar foramen; tib, tibia. (The upper scale bar applies to A, B, and C, the lower bar to D and E.)