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Unformatted text preview: • Bipedalism – the main characteristic that separates hominids from other primates What to look for? • Evidence for bipedalism o Fossil evidence Changes observable throughout the skeletal structure Head – foramen magnum located more towards the center of the skull in bipeds Spine – spinal column curved in bipeds and arched in other primates • Center of gravity Pelvis – pelvis of bipeds wider and doesn’t follow the spinal column Legs • Femur angles in in bipeds • Asymmetrical knee joints • Heel bone more robust • Foot stable and arched • No opposable big toe • Shorter toes (on average) o 2 types of evidence Bones Footprints The earliest bipeds? • Ahelanthropus tchadensis • C. 7 mya • Orrorin tugenensis • C. 6 mya...
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- Winter '09
- Anthropology, Hominidae, Hominina, bipeds Asymmetrical knee