ANT101H5 Lecture Notes - Lecture 6: Orrorin, Paleozoic, Lake Turkana
Document Summary
Ecological niche: a species way of life considered in the context of its environment (haviland , global climatically change (cid:224) appearance of some species and extinction of. Adaptive radiation: rapid diversification of an evolving population as it adapts to a variety of available niches (haviland & crawford, 2009: 138) Major periods & epochs of evolution of life. Paleozoic permian period (280 mya: permian deposits show mammal like reptiles, slimmer, flesh eaters, reduction in bones, shifting limbs : from side to interior, beginning of separation between mouth & nasal cavity, dental differentiation. 1st true mammals appeared: end of triassic period (190 mya: small flesh eaters, nocturnal, enlarged cerebral cortex, loss of color vision enhanced smell & hearing : olfactory. Suborder: plesiadapiformes: extinct mammal common ancestry with primates, squirrel like insectivore, flexible digits, wrists, ankles : for brachiating, tree-dwellers: arboreal. 1990s: scientists belived that they were convergent evolution that adapted to similar environment: carpolestes: in 2008, found in north america, plesiadapiformes evidence.
