Concavenator

Notable for the large crest on its back, Concavenator is a carnivorous theropod that dates back around 130 million years to the early Cretaceous period. This genus can grow up to 6m in length and over 800lbs in weight, with a long tail for maintaining balance and a pronounced triangular crest above its hips. Experts believe the crest may be used to regulate temperature or act as a display for attracting a mate.