The genus Ctenosaura represents the most diverse group of iguanas with 15 currently recognized species and at least two unrecognized species. These species inhabit lowland dry forests, below elevation, on both coasts of Mexico and Central America. All species of Ctenosaura fall within one of seven clades. Distributions of these clades fall geographically within well established areas. Closely related species show allopatry whereas species from divergent clades show sympatry.
