ANT 2000 Lecture Notes - Lecture 9: Postorbital Bar, Old World Monkey, Toe
Document Summary
Opposable pollexes - using your thumbs to grab things, opposable hallux (except humans), Dermal ridges (fingerprints), nails instead of claws. Forward facing eyes, color vision, postorbital bar all primates have a postorbital bar (behind the eye) higher primates have a postorbital bar with closure. Aye-aye features the most specialized of all primates. Secondarily evolved claws (very rare, evolved claws after evolving nails) Large brain, larger than any other strepsirhini. Female reproductive success limited by access to food. Male reproductive success limited by access to females. Ischial callosities (sitting pads) on the butt to protect it. Two families: cercopithecines , frugivorous (fruit eating) - cheek-pouch monkey, arboreal - long tails, terrestrial - short tails, colobines, folivorous (leave eating) - large multi-chambered stomach, long-tails, wide array of coloration, arboreal. Strictly arboreal (live and exist in trees) Prehensile tails (the end of the tail is full of muscle) only primates with this type of tail: spider monkey, woolly monkeys, howler monkeys.
