Sphenodontidae

Sphenodontids Temporal range: Early Jurassic - Holocene, 176–0 Ma PreЄ Є O S D C P T J K Pg N
Tuatara (Sphenodon punctatus)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Rhynchocephalia
Suborder:	Sphenodontia
Family:	Sphenodontidae Cope, 1870 (conserved name)
Type species
Hatteria punctata Gray, 1842
Subgroups
†Cynosphenodon †Oenosaurus Sphenodon †Zapatadon
Synonyms
Hatteriidae Cope, 1864 (rejected name) Rhynchocephalidae Hoffmann, 1881 (rejected name)

Sphenodontidae is a family within the group Sphenodontia. Most members of this family are only known from fossils but there is one living member, the tuatara (Sphenodon punctatus)^[1] from New Zealand.

The following is a cladogram of Rhynchocephalia after Farke et al., 2012.^[2]

Sphenodontidae	Sphenodon (Tuatara) Oenosaurus Cynosphenodon Zapatadon

References

1. Sphenodon punctatus in the Reptile Database, accessed 23 Jan 2016
2. Rauhut, O. W. M.; Heyng, A. M.; López-Arbarello, A.; Hecker, A. (2012). Farke, Andrew A, ed. "A New Rhynchocephalian from the Late Jurassic of Germany with a Dentition That is Unique amongst Tetrapods". PLoS ONE 7 (10): e46839. doi:10.1371/journal.pone.0046839.