Dilophosauridae

Dilophosauridae is taxonomic family in the suborder Theropoda. It includes the first large carnivorous dinosaurs. It appeared in the late Triassic till early Jurrassic. The dinosaurs in the Dilophosauridae family are well known for their distinctive head crests. The use of the crests is unknown. At first it only included Dilophosaurus. Later Dracovenator and Zupayasaurus were added.