BIOL 202 Lecture Notes - Lecture 10: Neanderthal, Homo Habilis, Gorillini
16 Mar 2016
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Lecture 10 primate diversity and hominin evoluion. Live at elevaion, can get down to -15 celsius. Strepsirrhini: found in madagascar, lemurs, slow loris, have longer hind legs that forelimbs. Haplorrhini: long arms, long tails use for balance (new world monkeys grasping/prehensile, family hominidae. Primate distribuion is limited warm climates: africa, southern/central america, southeast asia. Binocular vision and depth, for movement through trees. Nails/sensiive foot and hand pads/fricion ridges for grasping. Medial digits of hands (and feet) opposable. Oldest lineage is shelanthropus tchadensis (7 million years ago) 3. 5 million years ago: australopithecus species, wet arboreal lifestyle to dry plains. Earliest evidence of stone tools in homo habilis 2 million years ago. 25 million years ago: first apes, africa tropical, split from asian populaions. 20 million years ago: cooling and uplit reduces rainfall in parts of africa, expanded temperate zone, highlands, increased seasonality, dry belts, forces a change in ecological niche.
