The Tropiduridae are a family of iguanid lizards. The common side-blotched lizard is a species of small iguanid lizard. Lapitiguana impensa is an extinct giant (1.5 m long) iguanid from Fiji. Additionally, the species "Iguanid herpesvirus 2" is currently unassigned to a genus and subfamily. Iguanid lizards can change color on a much smaller time scale by varying melanin concentration.