134 species of which 98 (73.1%) are endemic -
8 genera of which 2 (25.0%) are endemic
(as of December 31st, 2018).
The genera assigned to this family were previously included in
Iguanidae (e.g., Peters & Donoso-Barros 1970). Family status was given by Frost & Etheridge (1989), who included three subfamilies (Leiocephalinae, Liolaeminae, Tropidurinae). The three subfamilies were subsequently given status as separate families by Frost, Etheridge, Janies & Titus (2001).
Trinidad & Tobago,