This species is currently known from three localities of the Serranía del Baudó in the region surrounding the Alto del Buey, a geographic isolated area that can only be reached by sea or air, where it is found at mid to high elevations (300–1,070 m asl) (Grant and Myers 2013). Its EOO is estimated at 71 km2.
Habitat and Ecology
Little is known about the habitat and ecology of this species. Specimens have been found on forested ridges and near rocky streams (Grant and Myers 2013). However, field vocalization observations of the species have occurred deep within forest, far from streams or permanent standing water (Grant and Myers 2013). It is expected that the eggs are laid in the leaf litter, and tadpoles are transported to water to by the parents where they continue to develop, as with other congeners (M. Anganoy-Criollo and A. Rymel-Acosta pers. comm. February 2017).
There is little information on the population size and trends of this species. The type series is comprised of 44 post-metamorphic frogs dating between 1971 and 1996 (Grant and Myers 2013).
Threats to this species are not currently well understood because of the remoteness of the area. Alto del Buey is still largely forested, however the forest within the distribution of the species is declining due to small-scale wood extraction, and also there is mining activity for gold that pollutes the bodies of water (M. Anganoy-Criollo and A. Rymel-Acosta pers. comm. February 2017). Harvesting for the pet trade is expected to occur in the future now that conflict with several armed forces have ceased and areas of its distribution are accessible (A. Rymel-Acosta pers. comm. February 2017).
The distribution of the species is near Parque Nacional Utría, but its presence in the park remains unknown (M. Anganoy-Criollo and A. Acosta pers. comm. February 2017).
The establishment of protected areas in the region is recommended since there are still large areas of forest remaining within the known distribution of the species (M. Anganoy-Criollo and A. Rymel-Acosta pers. comm. February 2017).
In the past, the distribution of the species was under the control of different illegal armed groups, and now that the armed conflict has ceased it is recommended to collect more information about this species' distribution, population status, ecology, and threats.
Red List Status
Data Deficient (DD)
Listed as Data Deficient in view of continuing uncertainties as to its extent of occurrence (EOO), population status and ecological requirements.
IUCN SSC Amphibian Specialist Group 2017. Silverstoneia minima. The IUCN Red List of Threatened Species 2017: e.T78586324A85888339. http://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T78586324A85888339.en .Downloaded on 9 December 2018