Thebanaspis_thebanaHedstroemia_pachydermataMilesdavis_eldredgeiM_zlichovianusMonodechenella_boteroiMonodechenella_halliM_macrocephalaM_legrandsmithiM_curvimarginataM_brevicepsOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Lieberman_1994ad