Ravine Lizard Dinosaur Evolution

Video Transcript

"Then we have another creature from the late cretaceous and this is called the ravine lizard or chasmosaur. He actually had what's called a long frill because his frill back here extended further back. It's a slight bit of differentiation between what's long and short frill, but he's called long frill. Again, the two horns in the front certainly could have served for protection. The back, maybe that was just to attract mates. We're not certain, but they were beautiful frills. We saw a very multitudinous number of them with all of the members of the ptersopsan family. Again, a vegetarian who lived in herds. A little smaller than triceratops, he would have been about the size of a small elephant."