Ceratosaurus

Ceratosaurus Temporal range: Upper Jurassic
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Sauropsida
Superorder:	Dinosauria
Order:	Saurischia
Suborder:	Theropoda
Infraorder:	Ceratosauria
Family:	†Ceratosauridae
Genus:	†Ceratosaurus Marsh, 1884
Species
C. nasicornis (type) Marsh, 1884 C. ingens (Janensch, 1920) C. dentisulcatus Madsen & Wells, 2000 C. magnicornis Madsen & Wells, 2000

Ceratosaurus was a predatory dinosaur from the Upper Jurassic period, 156 to 145 million years ago. It had a large horn on its nose, and a pair of smaller horns in front of its eyes. Uniquely among theropods, Ceratosaurus had armor, in the form of small osteoderms running down the middle of its back.