Dilophosaurus is a genus of theropod dinosaur. It contains a single known species, Dilophosaurus wetherilli, known from fossil remains found in the Kayenta formation of Arizona, USA. This rock formation has been dated to the early Jurassic Period (Sinemurian age), about 193 million years ago. Dilophosaurus was among the largest carnivores of its time (about 7 meters long) and had a pair of rounded crests on its skull.
Dilophosaurus (/daɪˌlɒfɵˈsɔrəs/ dy-lof-o-sawr-əs or /daɪˌloʊfɵˈsɔrəs/); is a genus of theropod dinosaur from the Sinemurian stage of the Early Jurassic Period, about 193 million years ago. The first specimens were described in 1954, but it was not until over a decade later that the genus received its current name.
dilophosaurus-skeleton./A reconstruction of Dilophosaurus at the Museum of Northern Arizona. Photo by Brian Switek http://phenomena.nationalgeographic.com/2014/01/28/how-dilophosaurus-became-a-rock-star/