ANT 301 Chapter Notes - Chapter 9: Kamoya Kimeu, Homo Erectus, Lake Turkana

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Chapter 9: the first dispersal of the genus homo: homo erectus and contemporaries. Grade- a grouping of organisms sharing a similar adaptive pattern; grade isn"t necessarily based on closeness of evolutionary relationship, but it does contrast organisms in a useful way. Dramatic increase in robusticity (heavily built body) Would have been around 6 feet tall. Considerable brain enlargement (also remember that brain size is linked to overall body size; h. erectus was considerably larger than earlier members of the genus homo) Less encephalized than later members of the genus homo. Crania displays a distinct shape (long, low braincase, wide base, sagittal keeling) Pre-natal brain growth was more like that of later humans and quite different from that found in apes or in australopiths such as lucy. Brain growth after birth was more rapid than in modern humans. Nuchal torus- a projection of bone in the back of the cranium where neck muscles attach; these muscles hold up the head.

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