13_from_hominin_to_homo

13_from_hominin_to_homo - 2/11/2011 How Humans Evolved...

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2/11/2011 1 How Humans Evolved Chapter 13: From Hominin to Homo W. W. Norton & Company © 2009
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2/11/2011 2 Homo ergaster Origins b Lived from around 1.8 to 0.6 mya in Africa. b May have coexisted with H. habilis in Kenya.
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2/11/2011 3 Homo ergaster Morphology b Ancestral features include narrowing of braincase behind the eyes, receding forehead, no chin. b Derived features include shorter nose, less prognathic face, taller skull, smaller jaws and molars, occipital torus, large browridges; many of these traits are probably related to diet.
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2/11/2011 4 Homo ergaster Morphology b Anatomical suite of characteristics indicates H . ergaster was fully adapted for terrestrial life, without the adaptations for arboreal life seen in earlier hominins. b Less sexual dimorphism than in other hominins.
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2/11/2011 5 Homo ergaster Morphology b No evidence that there was spoken language. b More rapid juvenile development than humans, but slower than earlier hominins.
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2/11/2011 6 Homo ergaster Tools and subsistence b Between 1.6 and 1.4 mya, H . ergaster improved on Oldowan tools and added the stone biface, a Mode 2 technological innovation that was part of the Acheulean industry. b Axes could have been used to butcher animals, to dig up tubers or water, to strip bark from trees, as projectiles to hurl at animals or people, or to generate flake tools.
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2/11/2011 7 Homo ergaster Tools and subsistence
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This note was uploaded on 10/02/2011 for the course BIO 1mo3 taught by Professor Rock during the Spring '11 term at McMaster University.

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13_from_hominin_to_homo - 2/11/2011 How Humans Evolved...

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