Lab notes 11132009 - Australopithecus africanus...

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Adaptations to Bipedalism -big pelvis -distal femur – bicondylar angle -robust Australopith dentition Reduced canine seize Megadontia: enlarged molars Temporalis muscle: original- parientals, insertion- coronoid process Masseter muscle: origin- zygomatic arches, insertion- ascending ramus Summary Trends over time -reduced canine size Shift in dietary preference from LCA w/chimpanzees -thicker enamel -reduced facial prognathism -megadontia -elaborate chewing musculature Ardipithecus ramidus -thin molar enamel -canines are larger than later australopiths Australopithecus anamensis
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-1 st clear evidence of bipedalism Australopithecus afarensis -thick molar enamel -reduced canines -bipedal postcranial adaptations
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Unformatted text preview: Australopithecus africanus Paranthropus robustus-reduced canines-robust australopith-megadontia-flaring zygomatics-sagittal crest Paranthropus boisei-east Africa-reduced canines Paranthropus aethiopicus-the black skull, hyper robust, sasgittal crest, sexual dimorphism Station 1: Look at surface area of molars Station 2: postorbital constriction Measure widest reath of orbits , width of braincase at smalles point immediately behind Station 3: pelvic shape Measure width and height of the ilium, calculate ratio (iliac index) Ilian width / iliac height * 100 Station 5: brain size Graph a trendline Cranial capacity vs body mass...
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Lab notes 11132009 - Australopithecus africanus...

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