Navajosphenodon

Navajosphenodon; Temporal range: Sinemurian–Pliensbachian PreꞒ Ꞓ O S D C P T J K Pg N
	Holotype specimen, scale bar: 1 cm
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Rhynchocephalia
Suborder:	Sphenodontia
Infraorder:	Eusphenodontia
Clade:	Neosphenodontia
Family:	Sphenodontidae
Subfamily:	Sphenodontinae
Genus:	†Navajosphenodon; Simões, Kinney-Broderick & Pierce, 2022
Type species
	Navajosphenodon sani; Simões, Kinney-Broderick & Pierce, 2022

Extinct genus of reptile

Navajosphenodon is an extinct genus of sphenodontid reptile from the Early Jurassic Kayenta Formation of Arizona, United States. It is known from a fully articulated skeleton and is similar in many aspects to the extant tuatara, both belonging to the Sphenodontinae, including sharing a complete lower temporal bar. It is one of the oldest known sphenodontines.^[1]

Sphenodontia

†Diphydontosaurus

Eusphenodontia

†Planocephalosaurus

†Clevosaurus

Neosphenodontia

†Homoeosaurus

†Pleurosauridae

	†Leptosaurus +†Kallimodon

	†Sapheosauridae

Sphenodontidae

†Eilenodontinae

Sphenodontinae

†Navajosphenodon

†Cynosphenodon

†Sphenofontis

	†Kawasphenodon

	Sphenodon (tuatara)

References

^ Simões, Tiago R.; Kinney-Broderick, Grace; Pierce, Stephanie E. (2022-03-03). "An exceptionally preserved Sphenodon-like sphenodontian reveals deep time conservation of the tuatara skeleton and ontogeny". Communications Biology. 5 (1): 195. doi:10.1038/s42003-022-03144-y. ISSN 2399-3642. PMC 8894340. PMID 35241764.

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[:0-1] Simões, Tiago R.; Kinney-Broderick, Grace; Pierce, Stephanie E. (2022-03-03). "An exceptionally preserved Sphenodon-like sphenodontian reveals deep time conservation of the tuatara skeleton and ontogeny". Communications Biology. 5 (1): 195. doi:10.1038/s42003-022-03144-y. ISSN 2399-3642. PMC 8894340. PMID 35241764.