Atelopus exiguus is a species of toad in the family Bufonidae. It is endemic to Ecuador and only known from the area of its type locality in the Azuay Province of southern Ecuador, in the sub-páramo and páramo of Cordillera Occidental. Common name Mazán jambato frog has been proposed for it. Description Adult males measure and females in snout–vent length. The body robust with short and thick legs. The snout is acuminate. The dorsum and flanks are bright yellowish-green to blackish-green, and the venter is yellow to orange. The iris is almost entirely black. The dorsal surfaces have some warts. Tympanum is absent. Habitat and conservation Its natural habitats are sub-páramo and páramo at elevations of above sea level, although it has also been recorded in pastureland. This formerly abundant species is believed to have declined. Both habitat loss (from agriculture, dams, or climate change), chytridiomycosis, and invasive trout are threats. The species occurs in the Cajas National Park and Mazán Protected Forest. References exiguus Amphibians of the Andes Amphibians of Ecuador Endemic fauna of Ecuador Amphibians described in 1892 Taxa named by Oskar Boettger Taxonomy articles created by Polbot