Leptoceratops_gracilisProtoceratops_andrewsiMagnirostris_dodsoniBagaceratops_rozhdestvnskyiTuranoceratops_tardabilisZuniceratops_christopheriChasmosaurus_belliPentaceratops_sternbergiiDiabloceratops_eatoniAlbertaceratops_nesmoiRubeosaurus_ovatusStyracosaurus_albertensisSpinops_stergbergorumCentrosaurus_apertusCoronosaurus_brinkmaniXenoceratops_foremostensisSinoceratops_zhuchengensisEiniosaurus_procurvicornisAchelousaurus_horneriPachyrhinosaurus_canadensisPachyrhinosaurus_lacustaiPachyrhinosaurus_perotorumANSP15400MOR692Nasutoceratops_titusiWendiceratops_pinhornensisCMN8804Malta_new_taxonOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Ryan_etal_2017a