ANT100Y1 Lecture Notes - Lecture 5: Homo Habilis, Homo Rudolfensis, Homo Erectus
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ANT100Y1 Full Course Notes
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Mosaic evolution- major evolutionary changes tend to take place in stages, not all at once. Hallux in feet just like hand in gorilla. In the back on gorilla, in the middle of skull in humans. Hips: long and narrow in gorilla, wide and short in human. Humans barrel shaped rib cage while gorilla looks like arrow. Ardipithecus ramidus: middle awash, ethiopia -4. 4mya, teeth and fragments, various upper and lower bones recovered, bothe ape-like (thin enamel) and human like traits, big toe off to the side. Some key austrolapithecines first (cid:862)real(cid:863) ho(cid:373)i(cid:374)i(cid:374)s: australopithecus afarensis. Ethiopia (hadar, omo, fejej) and tanzania (laetoli) Complex morphology exhibiting some ape-like traits (sagittal crests) and hominin like traits (valgus knee) Still sexually dimorphic canines, but less than apes. Laetoli footprints (in ash, fossilized: 3. 6 mya, demonstrate early hominins bipedal, big toes hardly diverge from rest of foot, (cid:862)heel toe(cid:863) gait like hu(cid:373)a(cid:374)s.
