Petrolacosaurus_kansensisYoungina_capensisProlacerta_broomiAgkistrognathus_campebelliAnshunsaurus_huangguoshuensisAskeptosaurus_italicusClarazia_schinziEndennasaurus_acutirostrisHescheleria_ruebeliNectosaurus_haliusParalonectes_merriamiThalattosaurus_alexandraeThalattosaurus_borealisXinpusaurus_bamaolinensisXinpusaurus_suniOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Liu_et_Rieppel_2005a