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In page Archaeoceratops:

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Archaeoceratops belonged to the Ceratopsia (the name is Greek for "horned face"), a group of herbivorous dinosaurs with parrot-like beaks which thrived in North America and Asia during the Cretaceous Period. In 1997 Dong and Azuma placed it in a new family, Archaeoceratopsidae. Helioceratops and possibly Yamaceratops have also been found to be members of Archaeoceratopsidae.[1]