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