ANTHROP 2E03 Lecture Notes - Lecture 9: Foramen Magnum, Toe, Sexual Dimorphism
9 Apr 2018
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Document Summary
Plesiadapiforms: primate like mammals, found in north america and europe, probably not ancestors of primates. Morphology: no post orbital bar closure, 3. 1. 4. 3 dentition, procumbent incisors, many quadrupeds, thumb/big toe. Arboreal life (szalay, 1973: herbivory, acrobatic jumping and climbing. Visual predation (cartmill, 1992: stereoscopic vision and flat nails. Identify prey visually and grip it with forelimbs. Rise of the angiosperms (sussman, 1991: coincides with flowering plants, reaching flowers/fruits/nectar on thin branches. Locomotion (crompton, 1995: primary selection pressure was locomotion, stereoscopic vision for jumping on small branches. First remains from north america is now disputed. More material in the last 20 years from asia. The first catarhines: egypt, richest primate fossil localities. Ape characteristics: appendix, no tail (cid:862)if it has no tail its an ape(cid:863, highly mobile arms (shoulder and elbow joints, unique elbow joint. More monkey like early miocene apes: deep thorax, long limbs, long mobile backs, oval radius, stable wrists, short straight digits, ex/ proconsul, afropithecus, mototopithecus, griphopithecus.
