Early Homo and Homo erectus

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Early Homo and Homo erectus

Discusses early Homo species and Homo erectus in particular.

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University of Missouri
Anthro 2050 - Introduction to Biological Anthropology With Laboratory
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Anthro2050 1st Edition Lecture 28 Outline of Last Lecture I. Gracile Australopithecines Continued II. Robust Australopithecines Outline of Current Lecture I. Early Homo II. Homo erectus Current Lecture Early Homo: -around 2.5 million years ago, a lot started happening in hominid evolution, and there was an explosion of speciation. -1.6 to 2.3 million years ago, Homo habilis. -the first species found to exhibit tool usage -East Africa -Oldowan stone tools, first hominid tool usage. it is tool usage that separates the genus Homo from other hominids. -H. habilis, a more shallow face, under the orbits. and a larger brain with the beginnings of a forehead. -animal remains with cut marks on the bones, clearly made by tools and not teeth, suggesting either early hunting or, more likely, savaging from other predator's kills. Either way, the eating of meat begins a rapid diet change as well as a rapid change in brain size. Homo erectus: -first hominid to leave Africa (many stayed in Africa but also expanded onwards) ending up in Europe, the Middle East, and as far as South Asia. (ex. Georgia, China, and India) -huge jump in cranial capacity (750-1067cc) -due to larger brains, the cranium starts expanding, which creates the potential for babies to have trouble squeezing their heads through the pelvis at birth. Also, this meant babies would need to be born earlier, before their heads got too big to go through the pelvis at all. -since children were being born more immature, this required greater parental investment. Also, bigger brains require more energy, and since brains develop rapidly in early years, this placed pressure on parents to be able to provide the caloric needs for the children. -giant brow ridges present -sagittal keel (not related to a sagittal crest) which is a slight thickening of the skull in a These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.

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