(Leptoceratops_gracilis,((Protoceratops_andrewsi,(Magnirostris_dodsoni,Bagaceratops_rozhdestvenskyi)),(Turanoceratops_tardabilis,Zuniceratops_christopheri,((Chasmosaurus_belli,Pentaceratops_sternbergii),(Diabloceratops_eatoni,Albertaceratops_nesmoi,Xenoceratops_foremostensis,Sinoceratops_zhuchengensis,Machairoceratops_cronusi,(Spinops_sternbergorum,Centrosaurus_apertus,Coronosaurus_brinkmani,(Rubeosaurus_ovatus,Styracosaurus_albertensis)),(Einiosaurus_procurvicornis,Achelousaurus_horneri,Pachyrhinosaurus_canadensis,Pachyrhinosaurus_lakustai,Pachyrhinosaurus_perotorum,Wendiceratops_pinhornensis),(Avaceratops_lammersi,Nasutoceratops_titusi))))));