Anthro lecture 4: primate evolution: primate teeth, diphyodonty: (cid:858)(cid:271)a(cid:271)(cid:455)(cid:859) a(cid:374)d (cid:858)adult(cid:859) teeth, tooth structure: crown, neck, and root, tooth anatomy: enamel, dentine & pulp cavity, heterodonty. Arboreal theory (szalay): shift to more herbivorous diet and more acrobatic grasp- leaping type of locomotion: 2. Visual predation theory (cartmill): ancestral primate was visual predator that stalked and grasped prey in canopy or forest undergrowth: 3. May have (cid:862)rafted(cid:863) o(cid:448)er fro(cid:373) afri(cid:272)a: 3 sequential sub epochs for apes, early miocene apes, late miocene apes, miocene monkeys (see txtb, early miocene (23. 0-12. 0 mya), moneys and apes (e. g. proconsul), apparently confined to. Africa 17 mya, before continents cut off from each other by expansion of mediterranean. Reduction in level of sexual dimorphism in canine size: 3) expansion of brain, why bipedalism, theories on origin of bipedalism in human evolution are important and speculative, 1. Postural feeding hypothesis (ecology, hunt, 1996: 2.