Week 13 ANT 102
Popular in Human Origins
Popular in anthropology, evolution, sphr
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This 0 page Class Notes was uploaded by Kelsey Gaudette on Friday November 13, 2015. The Class Notes belongs to ANT 102 at Illinois State University taught by Fred Smith in Fall 2015. Since its upload, it has received 12 views. For similar materials see Human Origins in anthropology, evolution, sphr at Illinois State University.
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Date Created: 11/13/15
The Earliest Humans A Key terms 1 Arboreal 2 Adaptive radiation rapid diversi cation into different niches fruits leaves insects birds small mammals Climate change 1 Climate change has a large effect on all animal evolution especially primate evolution 2 Monsoon season after formation of Himalayas Africa cradle of humankind 1 Home of nearest living relatives 2 Who are tropical forest adapted Early to middle Miocene Age of Apes dentition and body plan determines if ape or not Over 100 species identi ed Most of EuropeAfrica was forest Middle Miocene disruption i Disappearance of a lot of forest ii Dramatic drop in apes PWF Late Miocene 1 Climatic shift cooler dryer 2 Shift to grasslandssavanna 3 Opening up to opportunity for new species like horses Australopithecus 1 421 mya 2 First thing that happens in evolution is bipedalism getting rid of overlapping canines follows 3 Find most fossils for these in the Great Rift Valley South East and Central Africa 4 Geological time periods and dates Pliocene 525 mya and Pleistocene 25 mya 5 Physical description combo of ape and human features with some of their own i Modern looking pelvis basin shaped ii Bipedal iii Femur angled inwards at the knee bicondylar angle iv Laetoli footprints aligned big toe v Long arms short legs these walkers retained suspensory ability climbing vi Skull is apelike prognathism muzzle like lower face but the foramen magnum is under the skull vii Encephalization increase in brain size that matters viii Maxillary canine still large with distal cutting blade but smaller than modern chimps small diastema huge cheek teeth ix Small brain size 6 Lucy example of Australopithecus G Later Australopithecus 1 Human caninepremolar complex 2 Expanded cheek teeth 3 Cranial size bigger than chimpanzee 4 Sexual dimorphism 5 Retain somewhat long arms H Robust Australopithocene 1 Not our ancestors 2 More like bipedal gorillas 3 Have a sagital crest a place to center and anchor chewing muscles on
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