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