(Hypothetical_ancestor,(Proganochelys_quenstedti,(Palaeochersis_talampayensis,(Proterochersis_robusta,(Australochelys_africanus,(Kayentachelys_aprix,((Condorchelys_antiqua,((Meiolania_platyceps,Mongolochelys_efremovi),(Kallokibotion_bajazidi,((Platychelys_oberndorferi,(Caribemys_oxfordiensis,(Notoemys_laticentralis,((Elseya_dentata,(Chelodina_oblonga,Phrynops_geoffroanus)),(Podocnemis_expansa,(Erymnochelys_madagascariensis,Pelomedusa_subrufa)))))),((Dorsetochelys_delairi,((Pleurosternon_bullockii,(Glyptops_plicatulus,Dinochelys_whitei)),(Neurankylus_eximius,(Trinitichelys_hiatti,(Plesiobaena_antiqua,(Boremys_pulchra,(Baena_arenosa,Chisternon_undatum))))))),((Plesiochelys_solodurensis,(Portlandemys_mcdowelli,((Solnhofia_parsonsi,Santanachelys_gaffneyi),(Xinjiangchelys_latimarginalis,(((Judithemys_sukhanovi,(Dracochelys_bicuspis,(Hangaiemys_hoburensis,(Sinemys_lens,Ordosemys_leios)))),((Protochelydra_zangerli,(Macroclemys_temminckii,Chelydra_serpentina)),(Platysternon_megacephalum,((Mongolemys_elegans,(Gopherus_polyphemus,(Chrysemys_picta,Geoclemys_hamiltonii))),((Emarginachelys_cretacea,((Baptemys_wyomingensis,Dermatemys_mawii),(Hoplochelys_crassa,(Staurotypus_triporcatus,(Sternotherus_odoratus,Kinosternon_flavescens))))),((Adocus_beatus,(Zangerlia_neimongolensis,Basilemys_variolosa)),((Peltochelys_durlstonensis,Sandownia_harrisi),((Apalone_spinifera,Lissemys_punctata),(Anosteira_ornata,Carettochelys_insculpta))))))))),(Toxochelys_latiremis,((Caretta_caretta,Chelonia_mydas),(Mesodermochelys_undulatus,Dermochelys_coriacea)))))))),(Thalassemys_moseri,Hispaniachelys_prebetica))))))),(Eileanchelys_waldmani,Heckerochelys_romani))))))));