ANT100Y1 Lecture Notes - Sagittal Crest, Mosaic Evolution, Brain Size
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ANT100Y1 Full Course Notes
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Document Summary
Keywords: hominin, mosaic evolution, bipedalism, relative dating, sagittal crest, nuchal crest, Hominin modern humans, chimpanzees, and fossil species closely related to one another than other living species. Hominin evolution began within the pliocene epoch of the cenozoic era. Underwent mosaic evolution collection of different hominin features evolving at different rates over time. Morphological changes primarily occured in dentition, brain size, cranial + post cranial, and bipedalism. Earlier hominins had strong chewing muscles, strong mandibles, bigger teeth, and thin enamels. Earlier species of our genus homo indicate they had thinner jaw, globular cranium, and smaller teeth => implies our species ate softer food overtime. 3 reasons for increase in size: forage for food in large area, overall increase in body size, social complexity. Reliant on morphological posture and changes to the body. Posture theory of bipedalism states that early hominins were exposed to terrestrial land to eat food as opposed to arboreal primates hanging in trees.
