(Hypsilophodon_foxi,(Stegoceras_validus,(((Liaoceratops_yanzhiguouensis,(Yamaceratops_gobiensis,(Archaeoceratops_oshimai,((Graciliceratops_mongoliensis,((Bagaceratops_rozhdestvenskyi,Protoceratops_andrewsi),(Zuniceratops_christopheri,(Centrosaurus_apertus,Triceratops_horridus)))),(Montanoceratops_cerorhynchus,(Prenoceratops_peiganensis,(Leptoceratops_gracilis,Udanoceratops_tahizhovi))))))),(Psittacosaurus_mongoliensis,Psittacosaurus_sinensis)),(Chaoyangsaurus_youngi,IVPP_V12722)))); (Hypsilophodon_foxi,(Stegoceras_validus,(((Liaoceratops_yanzhiguouensis,(Yamaceratops_gobiensis,(Archaeoceratops_oshimai,((Graciliceratops_mongoliensis,((Bagaceratops_rozhdestvenskyi,Protoceratops_andrewsi),(Zuniceratops_christopheri,(Centrosaurus_apertus,Triceratops_horridus)))),(Montanoceratops_cerorhynchus,(Leptoceratops_gracilis,(Udanoceratops_tahizhovi,Prenoceratops_peiganensis))))))),(Psittacosaurus_mongoliensis,Psittacosaurus_sinensis)),(Chaoyangsaurus_youngi,IVPP_V12722))));