OHS 2019 Chap4

De biorousso
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One aspect I find very interesting is: how come the Paranthropus aethiopicus/robustus evolved to represent a sagittal crest? Also: Being the only lineages who show this particular caracteristic how did they evolve to prenet this crest only in males? (sexual dismorphism)

What is your hypothesis about Austrolopithecus and Paranthropus coexistance? Do you think these sympatric species lived up and close to each other or were always falling back due to their diets?