ANTHROP 2200 Lecture Notes - Lecture 8: Paranthropus, Foramen Magnum, Mosaic Evolution
7 Apr 2016
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Anthropology 2200: introduction to physical anthropology: describe five features of an obligate bipedal hominin that differ from a quadruped. The foramen magnum is repositioned farther underneath the skull for bipedal hominines, so that the head is more or less balanced on the spine. The pelvis is shaped more in the form of a basin to support internal organs within bipedal hominines. The lower limbs are elongated in bipedal hominines. The femur is angled inward, keeping the legs more directly under the body in bipedal hominines. The big toe is enlarged and brought in line with the other toes, a distinctive longitudinal arch forms, and this helps absorb shock. Mosaic evolution in relation to hominid evolution is the slow changes that took place in our ancestors before we actually became our normal hominid stage. Like the stages from transitioning from more chimp like characteristics to more common features. The robust australopithecines tend have the u-shaped dental arcade: patrick brown.
