11 species of which 2 (18.2%) are endemic -
3 genera of which none are endemic
(as of December 31st, 2018).
The genera contained in this family were previously included in
Iguanidae (e.g., Smith & Taylor 1950; Peters & Donoso-Barros 1970). Family status was given by Frost & Etheridge (1989), and Frost, Etheridge, Janies & Titus (2001).
S. Mexico, Central America, NW. South America.