ANTHROP 2200H Lecture 9: Hominid Evolution (7-2 mya)

• School: Ohio State University
• Department: Anthropology
• Course: ANTHROP 2200H
• Professor: Trask Lexine

Document Summary

Hominid evolution: the early years (7 2 mya: hominid vs. hominin, hominid. Humanlike beings after the split of evolutionary lineages (homo and pan: hominin. Evolutionary timeframe: miocene (7 5 mya, pleistocene (1. 8 0. 01 mya, holocene (0. 01 present, climate and environment. Wear on tips of canine and 3rd premolars: crushing food. Bipedal: mosaic evolution, cranial capacity, chimp 395 cc, gorilla 506 cc. Anthro 2200h: orangutan 411 cc, modern human 1325 cc. Time in trees: middle awash valley, ethiopia. 6,000 fossils (birds, reptiles, mammals, wood & pollen) Divergent hallux, long toes, rigid foot, curved phalanges. Origins and evolution of human / ape lineage. Closest of known fossils to last common ancestor (humans and chimps) Larger canines, massive jaw, thinner enamel, smaller molars, base of cranium is flattened. Position of foramen magnum (anterior), humerus (not as weight bearing), pelvis (short, broad) Cranial capacity: 380 500 cc (430 cc average) 3"6 5"1 feet, 64 154 pounds. Large teeth, intermediate jaw (neither u-shaped or parabolic)