(Protoceratops_andrewsi,(Turanoceratops_tardabilis,Zuniceratops_christopheri,(Diabloceratops_eatoni,Albertaceratops_nesmoi,Avaceratops_lammersi,Centrosaurus_apertus,Centrosaurus_brinkmani,Rubeosaurus_ovatus,Styracosaurus_albertensis,Spinops_sternbergorum,Einiosaurus_procurvicornis,Sinoceratops_zhuchengensis,(Achelousaurus_horneri,(Pachyrhinosaurus_canadensis,Pachyrhinosaurus_lakustai)),(Chasmosaurus_belli,Pentaceratops_sternbergii))));