Mean atmospheric O2
Geologic Time Scale
Prestosuchus amidst cycads
500 pound rauisuchian archosaur of the genus Prestosuchus wanders
amidst cycads and ferns in swamp 230 million years ago in what is today
Brazil. With long powerful legs, sharp teeth and a crocodile-like body,
Prestosuchus was probably an ambush predator and likely a fast runner.
Copyright © Walter B. Myers. All rights reserved.
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