YounginaGephyrosaurusDiphydonlosaurusPlanocephalosaurusPolysphenodonHomoeosaurusBrachyrhinodonCleuosaurusKallimodonSapheosaurusPiocormusPalaeopleurosaurusSphenodonEilenodonToxolophosaurusOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Wilkinson_et_Benton_1996a