BIOLOGY 1M03 Study Guide - Midterm Guide: Oreopithecus, Dryopithecus, Sivapithecus
17 Nov 2015
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Document Summary
Geology and climate: the earth"s continents have moved significantly in the past 200 million years, from a large mass called pangaea to the seven continents we recognize today, continental drift affects evolution by putting up barriers that isolate species and by effecting climate change, the last 20 million years of climate change have dramatically altered the course of human evolution. Although it was similar in brain size to other australopithecines, the teeth were much larger, and garhi had a sagittal crest to anchor large chewing muscles: p. aethiopicus from around 2. 5mya has specialized anatomy for heavy chewing, p. robustus, another robust hominin, dates from 1. 8 to 1 mya, and is even more specialized for heavy chewing than aethiopicus, p. boisei is larger still than the other two paranthropids, with a body type sometimes called hyperrobust, and dates from 2. 2 to 1. 3 mya.
