Palaeos		Sphenodontia
Vertebrates		References

Rhynchocephalia: References

LEPIDOSAUROMORPHA
|--SQUAMATA
`--o Rhynchocephalia
   |--Gephyrosaurus 
   `--Sphenodontidae
      |--Clevosaurinae
      `--Stem Group Sphenodontinae
         |--Pleurosauridae 
         `--+--Sphenodontinae 
            `--+--Sphenodontini
               `--Eilenodontini

References

Apesteguía, S. & Novas, F.E. 2003 Large Cretaceous sphenodontian from Patagonia provides insight into lepidosaur evolution in Gondwana. Nature 425, 609-612 (9 October 2003) abstract
Eilenodontini

Arantes, B. de A., Soares, M. B,. and Schultz, C. L., 2009, Clevosaurus brasiliensis (Lepidosauria, Sphenodontia) do Triassico superior do Rio Grande do Sul: anaaomia pos-craniana e relacoes filogeneticas: Rev. Bras. Paleontol, v. 12, n. 1, p. 43-54. pdf
Clevosauridae, Pleurosauridae

Benton M. J. 1985. Classification and phylogeny of the diapsid reptiles. Zoological Journal of the Linnean Society 84: 97-164.
Eilenodontini, Opisthias

Carroll, RL (1988), Vertebrate Paleontology and Evolution, WH Freeman & Co., 698 pp.
Overview

Evans, SE & D Sigogneau-Russell (1997), New sphenodontians (Diapsida: Rhynchocephalis) from the Early Cretaceous of North Africa. J. Vert. Paleontol. 17: 45-51.
Sphenodontidae.

Gauthier J., R. Estes, & K. de Queiroz. 1988. A phylogenetic analysis of Lepidosauromorpha. In: R. Estes and G. Pregill (ed.) Phylogenetic relationships of the lizard families: 15-98. Stanford: Stanford University Press. pdf
Sapheosaurini

Reynoso, V-H (1996), A Middle Jurassic Sphenodon-like sphenodontian (Diapsida: Lepidosauria) from Huizachal Canyon, Tamaulipas, Mexico. J. Vert. Paleontol. 16: 210-221.
Clevosaurinae; Sphenodontidae; Sphenodontinae.

Reynoso, V-H (1997), A "beaded" sphenodontian (Diapsida: Lepidosauria) from the Early Cretaceous of Central Mexico. J. Vert. Paleontol. 17: 52-59.
Sphenodontidae; Sphenodontinae.

Reynoso, V.-H., 2000: An unusual aquatic sphenodontian (Reptilia: Diapsida) from the Tlayua Formation (Albian), Central Mexico. –Journal of Paleontology: Vol. 74, #1, pp. 133-148 abstract
Eilenodontini, Sphenodontini

Reynoso, V-H & JM Clark (1998), A dwarf sphenodontian from the Jurassic La Boca formation of Tamaulipas, Mexico. J. Vert. Paleontol. 18: 333-339.
Clevosaurinae; Sphenodontidae; Sphenodontinae.

Romer, AS (1956), Osteology of the Reptiles. Krieger Publ. Co. (1997 ed.): 772 pp.
Overview.

Sues, H-D, NH Shubin & PE Olsen (1994), A new sphenodontian (Lepidosauria: Rhynchocephalia) from the McCoy Brook Formation (Lower Jurasic) of Nova Scotia, Canada. J. Vert. Paleontol. 14: 327-340.
Clevosaurinae.

Wu, X-C. 1994: Late Triassic-Early Jurassic sphenodontians from China and the phylogeny of the Sphenodontia. in Fraser, N. C. & Sues, H-D. 1994: In the Shadow of the Dinosaurs. Cambridge University Press, New York. 1994
Sapheosaurini

Karl A. von Zittel. Translated and edited by Dr Charles R. Eastman. Vol. II. Second English edition revised, with additions, by Sir Arthur Smith Woodward. Text-Book of Palaeontology.. New York: MacMillian. Public domain - Internet Archive.
Stem Group Sphenodontinae, Homaeosaurus

vonZittel, KA (1932), Text-book of Palaeontology vol.II, ( 2nd Eng. rev. ed.), trans. & ed. by CR Eastman, rev'd with additions by AS Woodward. MacMillan and Co, Ltd, London 

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