(Hypsilophodon_foxi,(Stegoceras_validus,(((Liaoceratops_yanzhiguouensis,(Asiaceratops_salsopaludalis,(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))));