(Hypsilophodon_foxii,(Stegoceras_validum,(Yinlong_downsi,(((Liaoceratops_yanzigouensis,(Aquilops_americanus,(Auroraceratops_rugosus,(Yamaceratops_dorngobiensis,(Archaeoceratops_oshmai,(Koreaceratops_hwaseongensis,((Graciliceratops_mongoliensis,((Ajkaceratops_kozmai,(Zuniceratops_christopheri,(Turanoceratops_tardabilis,((Chasmosaurus_belli,Triceratops_horridus),(Centrosaurus_apertus,Diabloceratops_eatoni))))),(Bagaceratops_rozhdestvenskyi,Protoceratops_andrewsi))),(Asiaceratops_salsopaludalis,(Cerasinops_hodgskissi,((Prenoceratops_pieganensis,((Leptoceratops_gracilis,(Ferrisaurus_sustutensis,Udanoceratops_tschizhovi)),(Zhuchengceratops_inexpectus,(Gryphoceratops_morrisoni,Unescoceratops_koppelhusae)))),(Ischioceratops_zhuchengensis,Montanoceratops_cerorhynchos))))))))))),(Psittacosaurus_mongoliensis,Psittacosaurus_sinensis)),(Chaoyangsaurus_youngi,Xuanhuaceratops_niei)))));