PlesiochelydaeXinjiangchelysSinemydaeChelidrydaeOsteopygisChelomacryptodiraToxochelysCtenochelysEuclastesPuppigerusChelonia_mydasBouliachelysNotocheloneSantanachelysDesmatochelysChelosphargisProtostega_gigasCorsochelysMesodermochelysDermochelysOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Kear_et_Lee_2006a