Ceratosaurus was a large theropod dinosaur that appeared in the film One million years BC. It attacks Tumak and fights with a Tricerotops before being impaled on its horns . The Ceratosaurus seen in the film is much larger than a real one would be and is also shown fighting a Tricerotops which it did not live alongside, with Ceratosaurus living in the Jurassic period and Tricerotops living in the cretacious period. Though Ceratosaurs never would have met Tricreatops fights like the one in this film between Ceratosaurus and Triceratops would have occured with Triceratops and Tyrannosaurus Rex.&nbsp