(Protoceratops_andrewsi,(Zuniceratops_christopheri,((Albertaceratops_nesmoi,((Centrosaurus_apertus,Styracosaurus_albertensis),(Einiosaurus_procurvicornis,(Achelousaurus_horneri,(Pachyrhinosaurus_canadensis,Pachyrhinosaurus_lakustai))))),(Chasmosaurus_belli,Triceratops_horridus))));