Dinosaur Ceratosaurus was a large predatory theropod dinosaur from the Late Jurassic Period (Kimmeridgian to Tithonian), found in the Morrison Formation of North America, and the Lourinhã Formation of Portugal (and possibly the Tendaguru Formation in Tanzania). It was characterized by large jaws with blade-like teeth, a large, blade-like horn on the snout and a pair of horns over the eyes. The forelimbs were powerfully built but very short. The skull was quite large in proportion to the rest of its body, measuring 62.5 cm in length in the holotype. Its most distinctive feature was a prominent horn, which was situated on the midline of the skull behind the nostrils. Only the bony horn core is known from fossils – in the living animal, this core would have supported a keratinous sheath. In the holotype specimen, the horn core is 13 centimeters (5.1 in) long and 2 centimeters (0.79 in) wide at its base but quickly narrows down to only 1.2 centimeters (0.47 in) further up; it is 7 centimeters (2.8 in) in height. The horn core formed from co-ossified protuberances of the left and right paired nasal bones. All these Dinosaur Ceratosaurus pictures were collected from the internet.