Frost et al. (1989) redefined this family. The genera belonging to the different subfamilies were assigned to separate families. This view is not generally accepted.

Frost et al classification of iguanas

Family Iguanidae

• Genus Amblyrhynchus
• Genus Brachylophus
• Genus Conolophus
• Genus Ctenosaura
• Genus Cyclura
• Genus Dipsosaurus
• Genus Iguana
• Genus Sauromalus
• Genus Armandisaurus (extinct)
• Genus Lapitiguana (extinct)
• Genus Pumila (extinct)

Traditional classification

Family Iguanidae

• Subfamily Corytophaninae: casquehead lizards
• Subfamily Crotaphytinae: collared and leopard lizards
• Subfamily Hoplocercinae: wood lizards, clubtails
• Subfamily Iguaninae: iguanas and spinytail iguanas
• Subfamily Leiocephalinae
• Subfamily Leiosaurinae
• Subfamily Liolaeminae
• Subfamily Oplurinae: Madagascar iguanids
• Subfamily Phrynosomatinae: earless, spiny, tree, side-blotched and horned lizards
  • Subfamily Polychrotinae: anoles
• Subfamily Tropidurinae: neotropical ground lizards

References

1. Frost, D.E. and R.E. Etheridge (1989) A Phylogenetic Analysis and Taxonomy of Iguanian Lizards (Reptilia: Squamata). Univ. Kansas Mus. Nat. Hist. Misc. Publ. 81
2. Frost, D.R., R. Etheridge, D. Janies and T.A. Titus (2001) Total evidence, sequence alignment, evolution of Polychrotid lizards, and a reclassification of the Iguania (Squamata: Iguania). American Museum Novitates 3343: 38 pp.