ANTH 1001 Lecture Notes - Lecture 10: Postorbital Bar, Shoulder Joint, Brachiation
Document Summary
Introduction to biological anthropology, week 7, lecture 10__ What defines the order primates: derived homologies. Petrosal bulla- the underside of the skull, made or petrosal part of temporal bone. Non-primates do not have it made of the petrosal part, they have t from the squamosal part of temporal bone. High degree of grasping ability in hands and feet. Sensitive tactile pads with skin ridges on the tips of the digits. Decreased reliance on olfaction (smell) particularly in haplorhines. Olfactory regions of the brain are reduced. Haplorhine primates have a significantly higher percentage of pseudogenes among the olfactory receptor gene family than do other mammals, this trend is especially pronounced in humans. Nasal structures of the skill are reduced. Haplorhines lack a moist naked skin (rhinarium) surrounding the nostrils. Trichromatic color vision in old world monkeys, apes, humans and some new world monkeys. Forward facing eyes with an enclosed bony orbit (postorbital bar)
