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.
Esteban Lavilla 2004. Telmatobius stephani. In: IUCN 2014