Bolitoglossa nigrescens 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Caudata Plethodontidae

Scientific Name: Bolitoglossa nigrescens (Taylor, 1949)
Common Name(s):
English Cordillera Central Salamander, Black Web-fotted Salamander
Magnadigita nigrescens Taylor, 1949
Taxonomic Source(s): Frost, D.R. 2013. Amphibian Species of the World: an Online Reference. Version 5.6 (9 January 2013). Electronic Database. American Museum of Natural History, New York, USA. Available at:
Taxonomic Notes: Populations in south-east Costa Rica and north-west Panama have recently been separated as Bolitglossa sombra and B. magnifica (Hanken et al. 2005).

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii) ver 3.1
Year Published: 2008
Date Assessed: 2008-01-01
Assessor(s): Savage, J., Wake, D., Chaves, G. & Bolaños, F.
Reviewer(s): Stuart, S.N., Chanson, J.S., Cox, N.A. & Young, B.E.
Listed as Endangered because its Extent of Occurrence is less than 5,000 km2, its distribution is severely fragmented, and there is continuing decline in the extent and quality of its habitat.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species occurs in the humid lower montane and montane zones of the northern Cordillera de Talamanca of Costa Rica, at 1,650-3,000m asl.
Countries occurrence:
Costa Rica
Additional data:
Lower elevation limit (metres):1650
Upper elevation limit (metres):3000
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:It is extremely rare, and only a very small number of specimens are known. It has not been recorded in the last 20 years.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species inhabits humid montane forest, and has been found in somewhat degraded habitats. It is terrestrial, living in holes and under logs and rocks, and it breeds by direct development.

Threats [top]

Major Threat(s): Outside of protected areas the main threat to it is habitat loss due to the destruction of natural forests for agricultural development, wood extraction, and human settlement. However, since it lives in a relatively cold region the pressure on its habitats is not very severe.

Conservation Actions [top]

Conservation Actions: It has been recorded from the Zona Protectora Cerros de Escazu and from the Reserva Forestal Los Santos.

Citation: Savage, J., Wake, D., Chaves, G. & Bolaños, F. 2008. Bolitoglossa nigrescens. The IUCN Red List of Threatened Species 2008: e.T59186A11883478. . Downloaded on 26 May 2018.
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