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STL Science Center
24 December 2014
Human Ankle, Tarsier Leg
The morphology of Archicebus indicates that it is one of, if not exactly the last common ancestor of all primates from humans to monkeys. The largest similarities between primates and Archicebus are found in the metatarsals and the ankle, particularly the calcaneus. These bones are similar in shape and proportion to those seen in later primates. Archicebus, however, also possesses a skull, teeth, and limb bones that are much more common to a groupof lower mammals (tarsiers).