Invalid subtaxa: Apertotemporalis Stromer 1934 [nomen dubium], Chelone obovata Owen 1842 [nomen dubium], Chelonia Agassiz 1857, Chelonii Latreille 1800, Chelys patagonica Wieland 1923 [nomen nudum], Euclastochelys Bergounioux 1955 [nomen dubium], Euclastochelys interrupta Bergounioux 1955 [nomen dubium], Pleurosternum obovata Owen 1842 [nomen dubium], Podocnemis lata Ristori 1895 [invalid subgroup], Sokotochelys Halstead 1979 [nomen dubium], Tretosternon punctatum Owen 1842 [nomen dubium], Tretosternum punctatum Owen 1842 [nomen dubium]
Parent taxon: Testudinata according to A. Pérez-García and X. Murelaga 2013
Sister taxa: Amblypus, Ancyropus, Australochelys, Chengyuchelyidae, Chinlechelys, Condorchelys, Eileanchelys, Heckerochelyidae, Heckerochelys, Helcura, Indochelys, Kayentachelys, Meiolaniformes, Mongolochelyidae, Naomichelys, Odontochelyidae, Odontochelys, Palaeochersis, Platycheloides, Proganochelys, Proterochersidae, Proterochersis, Saurischiocomes, Sichuanchelyidae, Spoochelys, Testudoolithidae
Subtaxa: Amphichelydia, Asturichelys, Athecae, Atlantochelys, Australochelyidae, Baenidae, Casichelydia, Cheirogaster, Chelone, Chelonia, Chelonichnium, Chelonipus, Chelycarapookidae, Chelydidae, Chengyuchelys, Chrysemys, Cryptodira, Cryptodiramorpha, Cryptrodiramorpha, Dermochelyoidea, Dermochelys, Dorsetochelys, Dracochelys, Eunotosauria, Geoclemys, Glaucochelone, Gopherus, Haichemydidae, Hangaiemys, Hylaeochelys, Judithemys, Kallokibotiidae, Larachelus, Lindholmemydidae, Mesodermochelys, Metachelydia, Neptunochelys, Oligochelone, Ordosemys, Pachychelys, Palaeomedusa, Paludinosa, Panpleurodira, Paracryptodira, Platysternon, Plesiochelydiae, Plesiochelys, Pleurosternidae, Portlandemys, Proganochelydia, Protemys, Protochelydra, Protoxinjiangchelys, Pseudosphargis, Santanachelys, Scutemys, Siamochelys, Solnhofia, Thalassemys, Thecophora, Therezinosaurus, Tholemys, Tomochelone, Toxochelys, Yaxartemys, Yumenemys
Ecology: