Atelopus guanujo


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Atelopus guanujo
Species Authority: Coloma, 2002
Common Name(s):
Spanish Puca Sapo

Assessment Information [top]

Red List Category & Criteria: Critically Endangered A2ace ver 3.1
Year Published: 2004
Date Assessed: 2004-04-30
Assessor(s): Luis A. Coloma, Santiago Ron, Martín R. Bustamante, Diego Cisneros-Heredia, Ana Almendáriz
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 three generations, inferred from the apparent disappearance of most of the population, probably due to chytridiomycosis.

Geographic Range [top]

Range Description: This species is known only from the type locality and its immediate vicinity (Guaranda, Gallo Rumi) in the Chimbo Basin of the Cordillera Occidental of Ecuador, in the province of Bolívar. These localities are between 2,600 and 2,923m asl in the upper Río Chimbo Valley (Coloma 2002).
Possibly extinct:
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: It is a rare species, and the most recent record dates from April 1988 (Coloma 2002). Since then, survey efforts have been unsuccessful in finding any individuals, suggesting a serious population decline and possible extinction.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: This species is an inhabitant of humid cloud forest. Frogs have also been collected in disturbed montane cloud forest areas (Coloma 2002). There is no specific information on breeding habits, but it is 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 most likely cause of the species' population decline is chytridiomycosis. Habitat loss is also a major threat, due to agriculture (crops, livestock, and wood plantations), logging, and infrastructure development for human settlement. Invasive species such as dogs, cats, and chickens also prey on this species.

Conservation Actions [top]

Conservation Actions: The known range of the species does not include any protected areas. Surveys are needed to establish whether or not this species still persists in the wild. In view of the severe threat of chytridiomycosis, any surviving populations should be maintained in captivity.

Citation: Luis A. Coloma, Santiago Ron, Martín R. Bustamante, Diego Cisneros-Heredia, Ana Almendáriz 2004. Atelopus guanujo. The IUCN Red List of Threatened Species. Version 2014.3. <>. Downloaded on 31 March 2015.
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