出典:Wikipedia
出典:『Wikipedia』 (2011/03/31 20:00 UTC 版)
Achelousaurus (typically pronounced /əˌkiːlɵˈsɔrəs/, though /ˌækɨˌloʊ.əˈsɔrəs/ might be a better reflection of the butchered etymology; "Achelous's lizard") is a genus of centrosaurine ceratopsid dinosaur from the Late Cretaceous Period of what is now North America 74 million years ago. It was a quadrupedal herbivore with a parrot-like beak, a rough boss (raised bony area) on the snout and two more behind the eyes, and two horns on the end of its long bony neck frill. With a total body length of 6 meters (20 feet), Achelousaurus was a medium-sized ceratopsian.