MarmorerpetonKaraurusLiaoxitritonJeholotritonChunerpetonValdotritonIridotritonPangerpetonSirenidaeHynobiidaeCryptobranchidaeAmbystomatidaeSalamandraDicamptodonPlethodontidaeRhyacotritonAmphiumidaeProteidaeOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Wang_et_Evans_2006a