OutgroupCynognathusDiademodonExaeretodonProbainognathusTritheledontidaeTritylodontidaeSinoconodonMorganucodontidaeDinnetheriumKuehneotheriumMultituberculataHaramiyidaeMonotremataVincelestesMarsupialiaPlacentaliaOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Wible_1991a