Leptoceratops_gracilisProtoceratops_andrewsiMagnirostris_dodsoniBagaceratops_rozhdestvenskyiTuranoceratops_tardabilisZuniceratops_christopheriChasmosaurus_belliPentaceratops_sternbergiiDiabloceratops_eatoniAlbertaceratops_nesmoiRubeosaurus_ovatusStyracosaurus_albertensisSpinops_sternbergorumCentrosaurus_apertusCoronosaurus_brinkmaniXenoceratops_foremostensisSinoceratops_zhuchengensisEiniosaurus_procurvicornisAchelousaurus_horneriPachyrhinosaurus_canadensisPachyrhinosaurus_lakustaiPachyrhinosaurus_perotorumAvaceratops_lammersiNasutoceratops_titusiWendiceratops_pinhornensisMachairoceratops_cronusiOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Lund_etal_2016b