The Dilophosaurus is a predator during the Jurassic Period. It appears briefly in When Dinosaurs Roamed America.
It was generaly the tallest of the carnivores during the Jurassic period. It has two pronounced crests' on it's head for decoration. Due to it being a predecessor of the larger carnivores of the time period it has longer arms for gripping.
The Dilphosaurus appears briefly during the documentary where it scares off the smaller predators, stealing their kill.