This species was previously reported from the Pacific lowlands in the departments of Chocó and Valle del Cauca, and from a single locality in the department of Cordoba, in northwestern Colombia. However this has found to be in error. It is easily confused with Bolitoglossa biseriata, and recent research has restricted B. silverstonei to the type locality located in Quebrada Bochoramá in the Municipality of Quibdó, Chocó Department, at 400 m asl (Brame and Wake 1972, Acosta-Galvis 2007, A. Rymel Acosta Galvis pers. comm. February 2017).
Habitat and Ecology
This species occurs in very humid tropical forest and can be found on low herbaceous vegetation, fallen leaves and epiphytes. Since it is known only from the holotype collected in humid tropical forest, there is no information to confirm its association with epiphytes and its occurrence in secondary habitats (A. Rymel Acosta Galvis pers. comm. 2017). Although there is limited ecological information, it is expected to reproduce by direct development, as with other congeners (A. Rymel Acosta Galvis pers. comm. 2017).
It appears to be a rare species that, following the availability of new information, is only known from the holotype (A. Rymel Acosta Galvis pers. comm. 2017). It has been recorded in surveys in 2009 and 2010 (Cortés-Gómez et al. 2013). Due to ongoing decline in the extent and quality of habitat, the population is suspected to be decreasing.
The region where the holotype was found is affected by habitat loss due to agricultural development (including planting of illegal crops), logging, mining activities for gold, human settlements, and pollution resulting from the spraying of illegal crops.
This species does not occur in any protected areas. It was previously reported to have been found in Paramillo National Park, however research found this to be erroneous because the specimen collected in the area was a misidentification of Bolitoglossa biseriata.
Improved habitat protection at sites at which the species is known to occur is necessary.
Research in taxonomy, population trends, ecology and distribution are recommended for the species.
Red List Status
Data Deficient (DD)
Listed as Data Deficient because its distribution, abundance, trend, and threats are too poorly known to allow the species to be placed in another category. However, it is important to note that region where the holotype was found is affected by habitat loss due to agricultural development (including planting of illegal crops), logging, mining activities for gold, human settlements, and pollution resulting from the spraying of illegal crops.
IUCN SSC Amphibian Specialist Group 2017. Bolitoglossa silverstonei. The IUCN Red List of Threatened Species 2017: e.T59206A85860492. http://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T59206A85860492.en .Downloaded on 20 January 2019