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