OphiacodontidaeEdaphosauridaeHaptodusSphenacodontidaeBiarmosuchiaEotitanosuchusAnteosauridaeEstemmenosuchidaeAnomodontiaGorgonopsidaeTherocephaliaDviniaProcynosuchusGalesauridaeThrinaxodonCynognathiaProbainognathusProbelesodonTrithelodontidaeMorganucodontidaeSinoconodonOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Sidor_et_Hopson_1998a