Dilophosaurus

Dilophosaurus was a theropod dinosaur from the Pliensbachian stage of the Early Jurassic Period. The name means 'two-crested lizard', from the two crests of the animal (Greek di meaning 'two', lophos meaning 'crest' and sauros meaning 'lizard'). The first specimens were described in 1954, but it was not until over a decade later that the genus received its current name. Dilophosaurus is one of the earliest known Jurassic theropods, but also one of the least understood.