This species is known from only four localities (Río Encrucijada, La Cumbrecita, Cerro el Manchao and Casa de Piedra de los Cajones) in the Sierra de El Manchao, Catamarca Province, in north-western Argentina. It has an altitudinal range of 2,200-2,300m asl.
Habitat and Ecology
It is wholly aquatic, breeding in small rivulets in mountain Yungas forest. The species does not occur in modified habitats.
It is a rare species.
The main threat is habitat loss, due to both selective logging and clear-cutting of primary Yungas forest. Other threats include the introduction of predatory fishes (trout), alteration of watersheds, agricultural activities, and potential mining within the area. Chytridiomycosis is a potential future threat.
It is not known from any protected areas, and there is a need for immediate protection of its montane forest habitat. This species requires careful population monitoring, particularly given the potential threat of chytridiomycosis.
Red List Status
Listed as Endangered, in view of its extent of occurrence of less than 5,000 km2 and area of occupancy of less than 500 km2, with all individuals in fewer than five locations, and a continuing decline in the extent and quality of its habitat.
Esteban Lavilla 2004. Telmatobius stephani. The IUCN Red List of Threatened Species 2004: e.T57363A11614288. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T57363A11614288.en .Downloaded on 24 January 2019