CAS AN 102 Study Guide - Final Guide: Treeshrew, Postorbital Bar, Olfactory Bulb
27 Mar 2014
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Document Summary
Divide geological time into eras, periods, and epochs. Tree shrews and flying lemurs closely related to primates. 290 species of primates organized in 6 superfamilies. Proimians (lemurs, lorises, tarsiers) and anthropoidea (monkeys, apes, humans) Strepsirhines (lemurs, lorises) and haplorhines (tarsiers, monkeys, apes, humans) Early primates: very small and lived in trees, probably nocturnal, insectivorous diet. Climatic change associated with radiations and extinctions of major primate groups. Fossil primates first appeared around 60 million years ago. Friction or tactile pads on fingers and toes. Petrosal bulla: covers and protects part of inner ear (truly unique to primates) Teeth unspecialized with a maximum of 2. 1. 3. 3 in living species. How an organism spreads growth and reproduction out over its lifetime. Arboreal hypothesis: primate traits arose as a response to living in trees in a three-dimensial environment, living in trees requires good vision, graspoing capabilities, advanced brain to manage requirements.
