BIOL 111 Lecture Notes - Lecture 21: Prehensile Tail, Thumb, Orangutan

• School: McGill University
• Department: Biology
• Course: BIOL 111
• Professor: Rudiger Krahe

Document Summary

Biol 111 lecture 21 mammals ii: primates, hominid evolution, & the central nervous. Lecture date/time: nov 19th, 2015 / 10:35-11:25 am. Arboreal ancestor, ~230-270 species (some are nocturnal) Grasping limb with opposable thumb (opossums also have opposable thumbs) Big cerebrum (center of intellect of brain) Highly social, reduced brood size & extended parental care. 48% of primate species are in danger of extinction within the next decade (land use, disease) Once found on all continents, but now just. Lemurs in madagascar have radiated, nat all are found in trees & some are diurnal (day) Amongst the smallest primates, the only entirely carnivorous primate. Fossils found in asia, europe, & north america. (rest of lecture speaks about anthropoids: monkeys, chimps, orangutans, humans) Prehensile tail: tail used to grasp/ hold objects not present in old world monkeys, present in most new world monkeys. New world monkeys also have flat noses & tend to be arboreal.