Skeletal Remains of Propliopithecus chirobates from the Egyptian Oligocene

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Abstract
A distal humerus, a fragmentary ulna, a tibia and several partial calcanei from Oligocene sediments in the Fayum Province of Egypt are attributed to Propliopithecus chirobates. Comparison and analysis of this material indicates that this species was an arboreal quadruped. All of the skeletal elements are more similar to the same bones in the Miocene hominoid Pliopithecus vindobonensis than to any extant primate species. Like Pliopithecus and Aegyptopithecus zeuxis, Propliopithecus exhibits numerous primitive skeletal features and more closely resembles living ceboids than either extant hominoids or cercopithecoid monkeys.