Prestosuchus lived during the Middle Triassic in what is now Rio Grande do Sul. It is estimated to have reached lengths of nearly 5 metres (16 ft). While it resembled a dinosaur in having a large body and upright posture, it was actually a rauisuchian archosaur, more closely related to modern crocodilians.
the musculature of Prestosuchus better represents a basal ("primitive") condition for archosaurs than it does a derived condition for crocodile-line.
the strongest leg muscles of Prestosuchus were responsible for the rotation of the limb, which is an indication of quadrupedal movement.
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