Xenothrix AMNHM

Phee, R. D. E. M & Meldrum, Jeff, 2006, Postcranial Remains of the Extinct Monkeys of the Greater Antilles, with Evidence for Semiterrestriality in Paralouatta, American Museum Novitates 3516, pp. 1-66 : 40

Xenothrix AMNHM 259903

Two proximal tibiae from the Long Mile faunal collection (the more complete of which is illustrated in fig. 22) were assigned to Xenothrix by MacPhee and Fleagle (1991). No additional discoveries have been made in recent years. As preserved the incomplete shafts of the Long Mile specimens are comparatively straight. The medial condylar articular facet is larger in area than the lateral, which is consistent with the asymmetry of the femoral condyles in Xenothrix . According to MacPhee and Fleagle (1991), certain features (size and prominence of scars for hamstrings and tibial tuberosity) suggest an animal that was capable of powerful flexion and extension at the knee. However, because of the inferred overall shortness of the hind limb and presence of features indicating slow climbing, exceptional leaping ability is unlikely.