Onchopristis numidus Nothosaurus specifically in what is now

specifically in what is now North America

Scale  1:35 - 57mm

retaining ancient features that would have been common in early thyreophorans

Proterosuchus fergusi es considerado uno de los arcosauriformes más basales

Onchopristis numidus Nothosaurus specifically in what is nowOnchopristis 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