Atelopus nanay 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Bufonidae

Scientific Name: Atelopus nanay Coloma, 2002
Taxonomic Source(s): Frost, D.R. 2014. Amphibian Species of the World: an Online Reference. Version 6 (27 January 2014). New York, USA. Available at: (Accessed: 27 January 2014).

Assessment Information [top]

Red List Category & Criteria: Critically Endangered (Possibly Extinct) A2ace; B2ab(v) ver 3.1
Year Published: 2004
Date Assessed: 2004-04-30
Needs updating
Assessor(s): Luis A. Coloma, Santiago Ron, Martín R. Bustamante, Stefan Lötters
Reviewer(s): Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson, Neil Cox and Bruce Young)
Listed as Critically Endangered because of a drastic population decline, estimated to be more than 80% over the last ten years, inferred from the apparent disappearance of most of the population (probably due to chytridiomycosis); and because its Area of Occupancy is less than 10 km2, all individuals are in a single location, and there is continuing decline in the number of mature individuals.
Date last seen: 1989

Geographic Range [top]

Range Description:This species is known only from páramo habitats near Laguna Toreadora, in the Cordillera Occidental, in Azuay Province, Ecuador (Coloma 2002) at around 4,000m asl.
Countries occurrence:
Possibly extinct:
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The current population status of this species is not known. It has not been recorded since July 1989, despite surveys within the range, suggesting a serious population decrease.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species is an inhabitant of herbaceous páramo. Some specimens have been found active close to streams and springs in an area of many interconnected pools, while others have been found on land under rocks (Coloma 2002). There is no specific information available on their breeding habits, but they are likely to be similar to other Atelopus species, with breeding and larval development taking place in streams.
Systems:Terrestrial; Freshwater

Threats [top]

Major Threat(s): The major threat is likely to be chytridiomycosis, leading to a catastrophic population decline as has occurred in many other montane species of Atelopus. Agriculture (both crops and livestock), as well as logging and infrastructure development for human settlement, are major threats to the species' habitat. Invasive alien species are also a problem.

Conservation Actions [top]

Conservation Actions: The type locality of the species is within Parque Nacional Cajas. Further survey work is required to determine whether or not this species survives in the wild. Given the threat of chytridiomycosis, any surviving individuals might need to form the basis for the establishment of an ex-situ population.

Citation: Luis A. Coloma, Santiago Ron, Martín R. Bustamante, Stefan Lötters. 2004. Atelopus nanay. The IUCN Red List of Threatened Species 2004: e.T54532A11162743. . Downloaded on 22 May 2018.
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