Charles W. Gilmore Achelousaurus Daftar genus dinosaurus Centrosaurinae Leptoceratops Marginocephalia Zuniceratops Chaoyangsaurus Yinlong Styracosaurus Wannanosaurus Beg tse Pentaceratops Homalocephale Pachycephalosauria Stygimoloch Ceratopsidae Centrosaurus Pachycephalosaurus Psittacosaurus Triceratops