(Heterodontosaurus_tucki,(Hypsilophodon_foxii,(Protoceratops_andrewsi,((P_major,(Psittacosaurus_sp,(P_neimongoliensis,((P_ordosensis,(P_xinjiangensis,(P_mongoliensis,P_meileyingensis))),(P_sinensis,P_sibiricus))))),(P_mazongshanensis,P_lujiatunensis)))));