ANTH 1001 Chapter : Notes For Test 2 5
Document Summary
Evolution of the extant hominoids: hylobatids: the lesser apes split from the great ape lineage around 20 ma, the african great apes also have a meager fossil records. Gap in the african hominoid fossil record between 13 and 10 ma. Humans are not desecendants of chimps and gorillas. Three hypotheses for the rise of the primates. Flowering plants and primates at the same time. Eocene?< two major events: first appurtenance of pesimians, then anthropoids. When: molecular clock suggests the split between humans and chimps was 6-8 ma. Mosaic evolution: a pattern of evolution in which the rates of evolution in one functional system vary from those in other systems. Bipedalism: stance phase: contact, midstance, propulsion, swing phase: toe-off, heel strike, center gravity. Hominin bipedalism: habitual: bipedalism is standard and most efficient form of locomotion, obligate: in that hominins cannot locomote efficiently in any other way. Foramen magnum- hole at the bottom of the skull.
