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I argued that the development of the Anterior Inferior Iliac Spine (AIIS), an entirely novel trait unique to the hominin pelvis, signaled a critical transformation from facultative (occasional) to obligate

I argued that the development of the Anterior Inferior Iliac Spine (AIIS), an entirely novel trait unique to the hominin pelvis, signaled a critical transformation from facultative (occasional) to obligate (exclusive) bipedality. The species that were considered included Homo sapiens, Australopithecus afarensis (Lucy), Ardipithecus ramidus (Ardi) and Pan troglodytes (chimpanzee); Ar. ramidus is believed to have been a facultative biped while both A. afarensis and H.

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Date Created
  • 2016-12
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