Ceratosaurus nasicornis prowls a Late Jurassic rainforest sometime between 153 and 148 million years ago. Found in North America and possibly also Africa and southern Europe, this meat-eating dinosaur would have been a contemporary and possibly a competitor with the larger Allosaurus, but seems to have preferred wetter environments. However, Ceratosaurus would have been more closely related to Cretaceous abelisaurs such as Carnotaurus and Majungasaurus. The nose horn for which the dinosaur is named could have been used either for display or for fighting over mates.