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Testudinata
| Testudinata Temporal range: Late Triassic – Holocene, Possible Early and Middle Triassic records in the form of fossil tracks[1]
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| Skeleton of Proganochelys quenstedti, American Museum of Natural History | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Pantestudines |
| Clade: | Testudinata Klein, 1760[2] |
| Subgroups[4] | |
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Testudinata is the group of all tetrapods with a true turtle shell. It includes both modern turtles (Testudines) and many of their extinct, shelled relatives (stem-turtles), though excluding Odontochelys and Eorhynchochelys, which are placed in the more inclusive Pantestudines.
- ^ Asher J. Lichtig; Spencer G. Lucas; Hendrik Klein & David M. Lovelace (2018). "Triassic turtle tracks and the origin of turtles". Historical Biology: An International Journal of Paleobiology. 30 (8): 1112–1122. doi:10.1080/08912963.2017.1339037. S2CID 133893011.
- ^ Joyce, Walter G.; Parham, James F. & Gauthier, Jacques Armand (2004). "Developing a protocol for the conversion of rank-based taxon names to phylogenetically defined clade names, as exemplified by turtles" (PDF). Journal of Paleontology. 78 (5): 989–1013. doi:10.1666/0022-3360(2004)078<0989:DAPFTC>2.0.CO;2. S2CID 15078337.
- ^ Gaffney, Eugene S. & Kitching, James William (1995). "The morphology and relationships of Australochelys, an early Jurassic turtle from South Africa". American Museum Novitates (3130): 1–29. hdl:2246/3666.
- ^ Sterli, Juliana; Martínez, Ricardo N.; Cerda, Ignacio A. & Apaldetti, Cecilia (6 August 2020). "Appearances can be deceptive: bizarre shell microanatomy and histology in a new Triassic turtle (Testudinata) from Argentina at the dawn of turtles". Papers in Palaeontology. 7 (2): 1097–1132. doi:10.1002/spp2.1334. S2CID 225515560.
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