Name: Clevosaurus.
Phonetic: Klee-vo-sor-us.
Named By: W. E. Swinton - 1939.
Synonyms: Dianosaurus, Glevosaurus.
Classification: Chordata, Reptilia, Diapsida, Lepidosauria, Sphenodontia, Sphenodontidae, Clevosaurus.
Species: C. hudsoni (type), C. bairdi, C. brasiliensis, C. cambrica, C. convallis, C. hadroprodon, C. latidens, C. mcgilli, C. minor, C. sectumsemper, C. wangi.
Diet: Insesctivore?
Size: Small, but eact meaurements depend upon the species.
Known locations: Belgium. Brazil. Canada. China. England. Luxembourg. South Africa. USA. Wales.
Time period: Late Triassic to early Jurassic.
Fossil representation: Numerus individuals.

       Clevosaurus is a genus of small lepidosaurian lizard that as a genus had a near global dsitribution during the Triassic and early Jurassic.

Further reading
- A new Triassic rhynchocephalian from Gloucestershire. Annals and Magazine of Natural History: Zoology, Botany, and Geology 4:591-594. - W. E. Swinton - 1939.
- The Osteology and Relationships of Clevosaurus (Reptilia: Sphenodontida). - Philosophical Transactions of the Royal Society B 321(1204):125-178. - N. C. Fraser - 1988.
- A new sphenodontian from the early Mesozoic of England and North America: implications for correlating early Mesozoic continental deposits, by N. C. Fraser. - In, The Nonmarine Triassic. New Mexico Museum of Natural History and Science Bulletin 3:135-139, : S. G. Lucas & M. Morales (eds.) - 1993.
- Late Triassic-Early Jurassic sphenodontians from China and the phylogeny of the Sphenodontida. In N. C. Fraser & H.-D. Sues (eds.), In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods. - Cambridge University Press, Cambridge 38-69. - X.-C. Wu - 1994.
- A new sphenodontian (Lepidosauria: Rhynchocephalia) from the McCoy Brook Formation (Lower Jurassic) of Nova Scotia, Canada. - Journal of Vertebrate Paleontology 14(3):327-340. - H.-D. Sues, N. H. Shubin & P. E. Olsen - 1994.
- A new species of the sphenodontian reptile Clevosaurus from the Lower Jurassic of South Wales. - Palaeontology 48 (4): 817–831. - Laura K. Säilä - 2005.
- A new species of Clevosaurus (Lepidosauria: Rhynchocephalia) from the Upper Triassic of Rio Grande do Sul, Brazil. - Palaeontology 49:917-923. - J. F. Bonaparte & H.-D. Sues - 2006.
- A distinctive Late Triassic microvertebrate fissure fauna and a new species of Clevosaurus (Lepidosauria: Rhynchocephalia) from Woodleaze Quarry, Gloucestershire, UK. - Proceedings of the Geologists' Association 126:402-416. - C. G. Klein, D. I. Whiteside, V. S. Lucas, P. A. Viegas & M. J. Benton - 2015.
- The terrestrial fauna of the Late Triassic Pant-y-ffynnon Quarry fissures, South Wales, UK and a new species of Clevosaurus (Lepidosauria: Rhynchocephalia). - Proceedings of the Geologists' Association. 129 (2): 99–119. - Emily Keeble, David I. Whiteside & Michael J. Benton - 2018.
- Taxonomic reassessment of Clevosaurus latidens Fraser, 1993 (Lepidosauria, Rhynchocephalia) and rhynchocephalian phylogeny based on parsimony and Bayesian inference. - Journal of Paleontology. 92 (4): 734–742. - Jorge A. Herrera-Flores, Thomas L. Stubbs, Armin Elsler & Michael J. Benton - 2018.
- Biomechanical properties of the jaws of two species of Clevosaurus and a reanalysis of rhynchocephalian dentary morphospace. - Palaeontology. 63 (6): 919–939. - Sofia A. V. Chambi-Trowell, David I. Whiteside, Michael J. Benton & Emily J. Rayfield (Stephan Lautenschlager [ed].) - 2020.


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