Geographic range. The greatest species richness is in Ecuador and Peru, but members of the genus Stenocercus are also found in Colombia, Brazil, Bolivia, Paraguay, Uruguay, and northern Argentina.. Species. The following 68 species are recognized, listed alphabetically by scientific name. Stenocercus aculeatus (O’Shaughnessy, 1879); Stenocercus albolineatus Teixeira, Prates, Nisa, Silva ...