ANT101H5 Lecture Notes - Lecture 10: Olduvai Gorge, Paranthropus, Sagittal Crest
10 Feb 2017
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Robust australopithecines (paranthropus) what is the functional specifics of the robust. Massive flat molars, with crowding of the front teeth. Lake turkana, kenya, east africa (1985) 2. 5 mya. Very large palate large area back teeth primitive traits. 1. 75 mya (cid:498)zinjanthropus boisei(cid:499) by louis leakey lg body size (34 49 kg) Cheek bones flare out to the sides. Massive palate & premolars large flat premolars and molars. Dating is not definite: thought to be anywhere from 1. 8 1 mya. Body size similar to a. africanus (32-40 kg) Bipedal thick bones & prominent ms markings. Cranial anatomy / brain flattened (cid:498)dished out(cid:499) face face positioned high with a low forehead. Sagittal crest smaller than a. boisei, and compound as in a. aethiopicus. Cranial capacity of approx 530 cc (450-550 cc) Dentition large flat molars (not in proportions as great as in a. boisei) We know that : there are at least 2 separate hominin lines between 3-1 mya.
