Alternative spelling: Chelyidae
Full reference: J. E. Gray. 1869. Notes on the family and genera of tortoises (Testudinata), and on the characters afforded by the study of their skulls. Proceedings of the Zoological Society, London 1869:165-224
Parent taxon: Chelonia according to C. Rusconi 1954
Sister taxa: Asturichelys, Athecae, Australochelyidae, Baenidae, Casichelydia, Cheirogaster, Chelonia, Chengyuchelys, Chrysemys, Cryptodira, Cryptodiramorpha, Cryptrodiramorpha, Dermochelyoidea, Dermochelys, Dorsetochelys, Dracochelys, Geoclemys, Gopherus, Haichemydidae, Hangaiemys, Hispaniachelys, Hylaeochelys, Judithemys, Larachelus, Lindholmemydidae, Mesodermochelys, Ordosemys, Palaeomedusa, Panpleurodira, Paracryptodira, Platysternon, Plesiochelydiae, Plesiochelys, Pleurosternidae, Portlandemys, Proganochelydia, Protochelydra, Protoxinjiangchelys, Santanachelys, Siamochelys, Solnhofia, Thalassemys, Thecophora, Tholemys, Toxochelys, Atlantochelys, Glaucochelone, Neptunochelys, Oligochelone, Pachychelys, Pseudosphargis, Therezinosaurus, Tomochelone, Scutemys, Kallokibotiidae, Metachelydia, Yumenemys, Eunotosauria, Amphichelydia, Chelonichnium, Paludinosa, Chelycarapookidae, Yaxartemys, Chelone, Chelonipus, Protemys
Subtaxa: Hydraspis
Ecology: