Hypothetical_ancestorProganochelys_quenstedtiProterochersis_robustaPalaeochersis_talampayensisAustralochelys_africanusKayentachelys_aprixMeiolania_platycepsMongolochelys_efremoviKallokibotion_bajazidiPlatychelys_oberndorferiCaribemys_oxfordiensisNotoemys_laticentralisElseya_dentataChelodina_oblongaPhrynops_geoffroanusErymnochelys_madagascariensisPelomedusa_subrufaPodocnemis_expansaDorsetochelys_delairiPleurosternon_bullockiiGlyptops_plicatulusDinochelys_whiteiNeurankylus_eximiusTrinitichelys_hiattiPlesiobaena_antiquaBoremys_pulchraBaena_arenosaChisternon_undatumPortlandemys_mcdowelliPlesiochelys_solodurensisSolnhofia_parsonsiThalassemys_moseriSantanachelys_gaffneyiXinjiangchelys_latimarginalisHangaiemys_hoburensisJudithemys_sukhanoviDracochelys_bicuspisSinemys_lensOrdosemys_leiosToxochelys_latiremisCaretta_carettaChelonia_mydasMesodermochelys_undulatusDermochelys_coriaceaProtochelydra_zangerliMacroclemys_temminckiiChelydra_serpentinaPlatysternon_megacephalumMongolemys_elegansGopherus_polyphemusChrysemys_pictaGeoclemys_hamiltoniiEmarginachelys_cretaceaBaptemys_wyomingensisDermatemys_mawiiHoplochelys_crassaStaurotypus_triporcatusSternotherus_odoratusKinosternon_flavescensZangerlia_neimongolensisBasilemys_variolosaAdocus_beatusPeltochelys_durlstonensisSandownia_harrisiApalone_spiniferaLissemys_punctataAnosteira_ornataCarettochelys_insculptaOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Joyce_2007a