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