This species is known from Ayanganna Mountain in Guyana, in the La Escalera region and from the slopes of Auyantepui in Bolívar state, Venezuela. It has been recorded from 600-1,500m asl.
Habitat and Ecology
A nocturnal species usually found on marginal vegetation of rocky permanent streams, most frequently closely associated with cascading mountain streams, on clean boulders in, and at the edges of streams, perched perpendicular to some branches over streams, and in the spray zone of waterfalls. Adults carry the eggs and juveniles on their back where they breed through direct development.
It is a locally common species.
There are probably no threats to this species, since it occurs in a region of minimal human impact.
Some Venezuelan populations are protected within Canaima National Park in Bolívar State.
Red List Status
Least Concern (LC)
Listed as Least Concern since, although its Extent of Occurrence is probably less than 20,000 km2, it occurs in an area of extensive, suitable habitat which appears not to be under significant threat, it has a presumed large population, and it is unlikely to be declining fast enough to qualify for listing in a more threatened category.
This species was considered to be a synonym of Stefania evansi by Duellman and Hoogmoed (1984), but was revived by Señaris et al. (1997). This genus has recently been moved from the family Hylidae (Faivovich, et al., 2005).
Celsa Señaris, Ross MacCulloch, Enrique La Marca 2004. Stefania scalae. The IUCN Red List of Threatened Species 2004: e.T56036A11415544. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T56036A11415544.en .Downloaded on 20 January 2019