121homo - Origins of the Genus Homo The Discovery of Homo...

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Origins of the Genus Homo
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The Discovery of Homo habilis • A large brained hominid first described by Lewis Leakey from Olduvai Gorge material • Found below A. boisei remains, suggesting the co- existence of several different hominid species
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Stratigraphic Relationships of Olduvai Hominids H. habilis A. boisei H. erectus H. habilis
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Homo habilis The name Homo habilis is used to distinguish the earliest members of our genus from the australopithecines. Specimens assigned to this species have been found in southern and eastern Africa in deposits dating from 2.3 to 1.6 million years ago. Since H. habilis was a product of the gradual transformation of earlier more primitive forms, the status of specimens close to the time where our genus became an independent lineage is difficult to determine.
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Differences between australopithecines and Homo habilis Homo habilis traits ¾ larger brain than the australopithecines ¾ Smaller teeth than the australopithecines
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How many transitional species were there?
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Anagenesis vs. Cladogenesis Anagenesis: A pattern of evolutionary change involving the transformation of an entire population, sometimes to a state different enough from the ancestral population to justify renaming it as a separate species; also called phyletic.
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121homo - Origins of the Genus Homo The Discovery of Homo...

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