Synapsida_slash_DiapsidaProganochelysAustralochelysPalaeochersisProterochersisMegapleurodiraKayentachelysKallokibotionMongolochelysPleurosternidaeBaenidaeXinjiangchelysSolnhofiaPlesiochelyidaeMeiolaniaNinjemysNiolamiaChubutemysSinemysOtwayemysHangaiemysDracochelysOrdosemysJudithemysChelydridaeChelonioideaTrionychoideaTestudinoideaOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Gaffney_etal_2007a