baa outline 8

baa outline 8 - November 13, 2007 Powerpoints 10 and 11...

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November 13, 2007 Powerpoints 10 and 11 Early Archaic H. Sapiens evolved from Homo erectus o Middle Pleistocene specimens are ALL Homo sapiens but much diversity within this group Late Archaic H. Sapiens (Neanderthals) o Specimens found in very cold weather sites o Brain is larger than modern H. sapiens (see skull picture on slide) o Large cranium o Occipital bun on back of skull o Longer skull from front to back but more shallow from top to bottom o Large eyebrow ridges o Lived 600, 000 to 40, 000 years ago o Complete skeleton found in France (1908) Lots of disagreement on how: o Early Homo evolved into H. erectus o H. erectus evolved into early H. sapiens o Archaic H. sapiens evolved into modern H. sapiens 2 possible phylogenies (see slides) o 1st is very direct line from australopithecus to modern human o 2 nd is more branched and does not include the “archaic H. sapiens” category Issues with taxonomy: o “archaic H. sapiens” is a very poorly defined group so it is hard to classify fossils o Some early archaic specimens of Homo are very different from H. sapiens o Some argue that neanderthals are a separate species called H. neanderthalensis
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baa outline 8 - November 13, 2007 Powerpoints 10 and 11...

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