Yinlong Ceratopsia Leptoceratops Marginocephalia Zuniceratops Styracosaurus Beg tse Homalocephale Wannanosaurus Pentaceratops Stygimoloch Centrosaurinae Pachycephalosauria Ceratopsidae Centrosaurus Triceratops Pachycephalosaurus Psittacosaurus
Yinlong Ceratopsia Leptoceratops Marginocephalia Zuniceratops Styracosaurus Beg tse Homalocephale Wannanosaurus Pentaceratops Stygimoloch Centrosaurinae Pachycephalosauria Ceratopsidae Centrosaurus Triceratops Pachycephalosaurus Psittacosaurus