Leiosauridae

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Lepidosauromorpha
Superordo: Lepidosauria
Ordo: Squamata
Cladus: Unidentata Episquamata Toxicofera
Subordo: Iguania
Infraordo: Pleurodonta

Familia: Leiosauridae
Subfamiliae (2): Leiosaurinae - Enyaliinae
Name

Leiosauridae Frost, Etheridge, Janies & Titus, 2001: 12

Type genus: Leiosaurus Duméril & Bibron, 1837, by original designation.

References
Primary references

Frost, D.R., Etheridge, R., Janies, D. & Titus, T.A. 2001. Total evidence, sequence alignment, evolution of Polychrotid lizards, and a reclassification of the Iguania (Squamata: Iguania). American Museum Novitates 3343: 1–38. hdl: 2246/2896

Additional references

Morando, M., Olave, M., Ávila, L.J., Baker, E. & Sites, Jr., J.W. 2015. Molecular Phylogeny of the Lizard Clade Leiosaurae Endemic to Southern South America. Herpetologica 71(4): 322–331. DOI: 10.1655/HERPETOLOGICA-D-14-00067 Open access Reference page.

Leiosauridae is a family of iguanian lizards containing six genera and 34 species. The family is endemic to Central America and South America.
Genera

The family Leiosauridae contains the following genera:[1]

Genus	Image	Type species	Taxon author	Common name	Species
Anisolepis		A. undulatus (Wiegmann, 1834)	Boulenger, 1885	Tree lizards	3
Diplolaemus	D. darwinii	D. darwinii Bell, 1843	Bell, 1843	Patagonian lizards	4
Enyalius	E. catenatus	E. catenatus (Wied, 1821)	Wagler, 1830	Fathead anoles	11
Leiosaurus	L. bellii	L. bellii Duméril & Bibron, 1837	Duméril & Bibron, 1837	Smooth iguanas	4
Pristidactylus	P. achalensis	P. fasciatus (d'Orbigny & Bibron, 1837)	Fitzinger, 1843	Big-headed iguanas	10
Urostrophus		U. vautieri Duméril & Bibron, 1837	Duméril & Bibron, 1837	Steppe iguanas	2

References

"Leiosauridae". The Reptile Database. www.reptile-database.org.

Wikimedia Commons has media related to Leiosauridae.
Further reading

Frost, Darrel R.; Etheridge, Richard; Janies, Daniel; Titus, Tom A. (2001). "Total Evidence, Sequence Alignment, Evolution of Polychrotid Lizards, and a Reclassification of the Iguania (Squamata: Iguania)". American Museum Novitates (3343): 1-38. (Leiosauridae, new family, p. 12).