ANTH 1001 Lecture Notes - Lecture 10: Postorbital Bar, Trichromacy, Binocular Vision
Document Summary
Two main groups of primates: suborder strepsirhini and suborder haplorhini. Derived homologies, criteria to identify primates: petrosal bulla only trait that de nes primates and does not apply to any other group. Not important because we don"t know what it does: high degree of grasping ability in the hands and feet can apply to other animals, increased ability compared to other animals. All primates have at least one nail: decreased reliance on olfaction (smell), olfactory regions of the brain are reduced in size in primates. Haplorhines lack a moist naked skin surrounding the nostrils in comparison to strepsirhines. Haplorhine primates have a signi cant higher percentage of pseudogenes among the olfactory receptor: stereoscopic vision and enhances depth perception. Trichromatic vision in old world monkeys, apes, humans and some new world. Monkeys: forward-facing eyes with an enclosed bony orbit (postorbital bar, enclosed bony orbits, large brain relative to body size, expanded neocortex, prolonged life history, single o spring.
