121archaic

121archaic - Archaic Homo sapiens Important events during...

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Archaic Homo sapiens
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Important events during the Middle Pleistocene: 700,000 years ago to 130,000 years ago • Climatic conditions alternated between cold wet and warm dry periods. • This undoubtedly selected for rapid adaptation to the environment through culture.
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The Demise of Homo erectus H. erectus persisted in Africa and Asia until about 400,000 years ago when archaic members of our own species, Homo sapiens, began to appear. • The relationship between H. erectus and later forms is a matter of debate. Population replacement and continuity are both postulated.
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Middle Pleistocene Trends in Biological Evolution • Trends toward increased brain size, hemispheric specialization and reduction in the size of the jaws • Appearance of the first Homo sapiens with cranial capacities comparable to those of modern humans
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Differences Between Early H. sapiens and H. erectus • Lack well developed supraorbital torus of H. erectus • Have a cranial capacity and dental dimensions that fall within the lower part of the range found for modern human populations • More rounded occipital region than in H. erectus and the face is flatter
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Changes in Cranial Vault Shape • Largest width of the cranial vault is high on the skull rather than low as in H. erectus • Cranial vault is not as thick as in H. erectus and more
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This note was uploaded on 08/06/2008 for the course ANTH 121 taught by Professor Walker during the Spring '08 term at UCSB.

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121archaic - Archaic Homo sapiens Important events during...

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