about 15 million years ago

and it is thought that it may have evolved in this way to compete with each other

rivaling in size with some of the dinosaurs of its time

specifically in the Upper Cretaceous

Unlike many other herbivorous dinosaurs

Dilophosaurus Plesiosaurus about 15 million years agoDilophosaurus (D. wetherilli, "Two crested lizard") is a genus of coelophysid theropod dinosaur that lived during the Sinemurian and Pliensbachian Age of the Early Jurassic, approximately 193 to 183 million years ago. The Dilophosaurus was a medium sized bipedal predator, with a length of about 6 7 meters in length and a weight of around 400 kilograms, and the findings suggest that it could hunt in groups. Dilophosaurus had a distinctive skull with