ANTH 2010 Lecture Notes - Lecture 27: Sagittal Crest, Sahelanthropus, Koobi Fora

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All subject to debate for hominin status for all of these, never full agreement. Australopithecus anamensis: root of everything: analyzing bones, str aight up and down, 4ma, discovered early 90s, joint canyon american/ethopian/japanese team working at the same time. Orrorin tugenensis: earlier fossil, 6. 0ma (orrorin, original person. 350 cubic centimeters (just like chimp), beyond 4ma: small brains, neck region of skull is long, not rounded like in humans, which suggests stronger neck features (primitive feature) Northern tanzania: leakey family working from 1931, nding stone tools, basic stu , knew they were hominids but couldn"t nd any. Cheek teeth, small interior teeth, much like robustus but exaggerated even more, some teeth even smaller, some even bigger, teeth 2. 7 expected size for primate of its body size, As well as a toolmaker: p. boisei named. This was the true toolmaker and homo, while boisei was around, so was this one called homo habilis (coined by ramon dart)

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