👉 Petrosaurus is a genus of dinosaur that lived during the Early Cretaceous period, around 253-219 million years ago in North America. It was a quadrupedal herbivore with an elongated body and long neck, and it had a large, powerful jaw for crushing tough plant matter. Petrosaurus is known for its impressive fossilized remains that were found at the Paleolithic site of Petronas, which dates back to about 25