(Hypsilophodon_foxii,(Stegoceras_validum,(Chaoyangsaurus_youngi,(Psittacosaurus_mongoliensis,(Archaeoceratops_oshimai,((Asiaceratops_salsopaludalis,(Montanoceratops_ceorhynchus,(Leptoceratops_gracilis,Udanoceratops_tschizhovi))),(Microceratops_gobiensis,((Bagaceratops_rozhdestvenskyi,Protoceratops_andrewsi),(Zuniceratops_christopheri,(Centrosaurus_apertus,Triceratops_horridus))))))))));