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Centrosaurus
''Centrosaurus'' ( ) is a genus of herbivorous ceratopsian dinosaurs from the late Cretaceous of Canada. Their remains have been found in the Dinosaur Park Formation, dating from 76.5 to 75.5 million years ago.
The name ''Centrosaurus'' means "pointed lizard" (from Greek ''kentron'', κέντρον, "point or prickle" and ''sauros'', σαῦρος, "lizard"), and refers to the series of small hornlets placed along the margin of their frills, not to the nasal horns (which were unknown when the dinosaur was named). The genus is not to be confused with the stegosaur ''Kentrosaurus'', the name of which is derived from the same Greek word.
== Description ==
The massive bodies of ''Centrosaurus'' were borne by stocky limbs, although at up to 20 ft (6m) they were not particularly large dinosaurs. Like other centrosaurines, ''Centrosaurus'' bore single large horns over their noses.〔 These horns curved forwards or backwards depending on the specimen. Skull ornamentation was reduced as animals aged.
''Centrosaurus'' is distinguished by having two large hornlets which hook forwards over the frill. A pair of small upwards directed horns is also found over the eyes. The frills of ''Centrosaurus'' were moderately long, with fairly large fenestrae and small hornlets along the outer edges.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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