Synonyms: Chelonia Latreille 1800, Chelonii Latreille 1800
Parent taxon: Testudinata according to D. Perea et al. 2014
See also Agnolín et al. 2023, Andrews 1906, Benton 1985, Broom 1913, Carroll 1988, Case 1904, Cvancara and Hoganson 1993, Danilov and Parham 2008, Dundee 1989, Frank and Ramus 1996, Gadow 1898, Garcia et al. 2016, Gardiner 1982, Gauthier et al. 1989, Günther 1886, Haeckel 1866, Haubold 1971, Haubold 1974, Haughton and Brink 1954, Hay 1902, Hay 1930, Holman and Case 1988, Jaekel 1911, Joyce 2007, Kuhn 1966, Lambe 1908, Laurin and Reisz 1995, Lee 1995, Leidy 1873, Li et al. 2008, Mantell 1854, Martinelli and Forasiepi 2004, Meyer and Zardoya 2003, Olson 1947, Owen 1859, Owen 1860, Owen 1861, Parham and Hutchison 2003, Parham and Pyenson 2010, Pearson et al. 2002, Peng et al. 2001, Pérez-García and Murelaga 2013, Perrier 1928, Previtera and González Riga 2008, Quenstedt 1882, Rhodin et al. 2017, Sepkoski 2002, Shoshani et al. 1989, Sterli 2008, Swinton 1934, Thurmond and Jones 1981, Turvey et al. 2017, Weems and George 2001, Williston 1917 and Woodward 1898
Sister taxa: Amblypus, Ancyropus, Aplax oberndorferi, Athecae, Australochelyidae, Australochelys, Chelonipedidae, Chelycarapookus, Chelycarapookus arcuatus, Chelys blakii, Chengyuchelyidae, Chengyuchelys, Chinlechelys, Emydhipus, Emys neumayri, Emys paranensis, Heckerochelyidae, Helcura, Helochelydridae, Kallokibotion, Megasternon, Mesochelydia, Mongolochelyidae, Odontochelyidae, Palaeochersis, Paracryptodira, Perichelydia, Platemys sehuensis, Platycheloides, Proganochelys, Proterochersidae, Protochelys, Saltosauropus, Siamochelys, Testudinites, Testudo elata, Testudo stricklandi, Testudofiexoolithidae, Testudoolithidae, Thalassochelydia, Thecophora, Tretosternon punctatum, Trionyx mammillaris
Subtaxa: Amphichelydia Apertotemporalis Apholidemys Asturichelys Casichelydia Chelone obovata Chelone sopita Chelonipus Chelonoides Chelycarapookidae Cryptodira Cryptodiramorpha Cryptrodiramorpha Entoplastrites Euclastochelys Euclastochelys interrupta Fluvialia Glaucochelone Haichemydidae Halmyrachelidae Larachelus Marina Meiolania damelipi Metachelydia Odontochelys Oligochelone Pachychelys Padiochelys Paludinosa Pancryptodira Panpleurodira Platychelone Platychelone emarginata Plesiochelydiae Pleurodira Podocnemis lata Proganochelydia Protemys Pseudosphargis Senonemys suemegensis Sokotochelys Tacuarembemys Temnoclemmys cordiformis Terrestria Therezinosaurus Tomochelone Triassochelys Trionyx fuchienensis Trionyx tshelkarensis
Ecology: