Cryolophosaurus is a dinosaur of the family Theropoda that lived 189 to 183 million years ago during the Lower Jurassic Period. With 6 meters long and 5 kg he was one of the greatest specimens of his time! It is distinguished by the presence of a crest bent backwards, whose function is still a mystery to scientists. It would play a vital role during the courtship display but would also be a sign of recognition between species!