Onchopristis numidus Nothosaurus Although fossils have been found

Although fossils have been found in Oklahoma

Proterosuchus fergusi es considerado uno de los arcosauriformes más basales

Proterosuchus ha sido interpretado durante mucho tiempo como un animal semiacuático

specifically in what is now North America

A diferencia de los ceratópsidos más derivados

Onchopristis numidus Nothosaurus Although fossils have been foundOnchopristis numidus was a cartilaginous fish that lived during the Cretaceous Period , about 100 million years ago, in the rivers and deltas that today correspond to North Africa and other regions of the ancient supercontinent Gondwana. At first glance, it would have resembled today's sawfish , with an elongated body and a "saw" shaped snout that made it unmistakable. That snout, technically called a rostrum , was covered in a row of large, needle