ANTH 505 Lecture Notes - Lecture 2: Postorbital Bar, Parallel Evolution, Toe
22 Sep 2013
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Document Summary
Old world monkey (owm) - cercopithecoids (cercopithecine and colombines) - monkeys in the old world (africa, asia and europe) New world monkey (nwm) - monkeys in the new world (americas) Traits that are shared because of a common ancestor. A phylogenetic tree as a notion of time and molecular data. Traits are relative, they depend on which group you are talking. Traits are relative, they depend on which group you are talking about. Example of plesiomorphy for primates: pendactily and fur/hair. A trait not present in the previous ancestral taxon. An apomorphy can be a loss or reversal. Due to parallel evolution and not to common ancestry. 4 groups - hands and feet, eyes and orbit, the ear, dental and postcranial features. Forward facing eyes - stereoscopic vision and depth perspective. Emphasis on vision - bigger area in the brain for the visual cortex.
