Leptoceratops_gracilisProtoceratops_andrewsiZuniceratops_christopheriTuranoceratops_tardabilisAlbertaceratops_nesmoiCentrosaurus_apertusPachyrhinosaurus_lakustaiChasmosaurus_belliChasmosaurus_russelliMojoceratops_perifaniaVagaceratops_irvinensisKosmoceratops_richardsoniAgujaceratops_mariscalensisUtahceratops_gettyiPentaceratops_sternbergiiCoahuilaceratops_magnacuernaAnchiceratops_ornatusArrhinoceratops_brachyopsROM_1439Ojoceratops_fowleriTorosaurus_latusTorosaurus_utahensisEotriceratops_xerinsularisNedoceratops_hatcheriTriceratops_horridusTriceratops_prorsusBravoceratops_polyphemusOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Mallon_etal_2014ab