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Ceratosaurus (sayr-AT-oh-sawr-us) meaning "horned lizard", in reference to the horn on its nose ( Greek ''kerat'' = horned + ''sauros'' = lizard) is a predatory Dinosaur from the Late Jurassic Morrison Formation of North America . It is characterized by large jaws with enormous, bladelike teeth, a large, bladelike horn on the snout, and a pair hornlets over the eyes. The forelimbs were powerfully built but very short. The type species is ''Ceratosaurus nasicornis'', although several other species have been named, including ''C. dentisulcatus'' and ''C. magnicornis'', and there is some controversy over the exact number of species. A conservative view favors three (''C. nasicornis, magnicornis, and dentisulcatus''), but a liberal view favors several additional species, including ''C. ingens'', ''C. stechowi'', and a species that has been referred to as ''C. meriani'', from Portugal. ''Ceratosaurus'' is known from the Cleveland-Lloyd quarry in central Utah and Dry Mesa in Colorado . It lived alongside dinosaurs such as '' Allosaurus '', '' Torvosaurus '', '' Apatosaurus '', '' Diplodocus '', and '' Stegosaurus ''. It may have competed with ''Allosaurus'' for prey, though ''Ceratosaurus'' was smaller at around 9–6 m in length, weighing 500 kg up to 1 tonne. Relatives of ''Ceratosaurus'' include '' Elaphrosaurus '' and the Abelisaur '' Carnotaurus ''. FILMOGRAPHY A ''Ceratosaurus'' battles a '' Triceratops '' in the 1966 remake of '' 1 Million Years B.C. ''. In '' Jurassic Park III '', a ''Ceratosaurus'' has a brief appearance. In the film When Dinosaurs Roamed America , a ''Ceratosaurus'' makes a few appearances but is later killed by an ''Allosaurus'' and eaten. EXTERNAL LINK
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