Atelopus halihelos 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Bufonidae

Scientific Name: Atelopus halihelos Peters, 1973
Common Name(s):
English Morona-Santiago Stubfoot Toad
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; B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2006
Date Assessed: 2006-01-31
Needs updating
Assessor(s): Santiago Ron, Luis A. Coloma, Martín R. Bustamante
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 Extent of Occurrence is less than 100 km2 and its Area Of Occupancy is less than 10km2, its distribution is severely fragmented, and there is continuing decline in the extent and quality of its habitat..
Date last seen: 1984
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is known only from the Cordillera Cutucú, in Morona-Santiago Province, in southern Ecuador, around 1,975m asl.
Countries occurrence:
Possibly extinct:
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Although sampling effort through the species' range is insufficient, it is likely that this species has undergone a population decline (as seen in other montane species of Atelopus). It was last recorded in 1984, and is perhaps no longer present at the type locality.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species is an inhabitant of humid montane forest. There is no specific information on their breeding habits, but these 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 most serious risk to this species is chytridiomycosis, which has had a devastating impact on other high-altitude Atelopus species. Agriculture, both crops and livestock, as well as logging and infrastructure development for human settlement are major threats to the species’ habitat.

Conservation Actions [top]

Conservation Actions: It is not known to occur in any protected areas. Surveys to confirm the continued existence of this species are needed; given the threat of chytridiomycosis, surviving individuals should be maintained in captivity.

Citation: Santiago Ron, Luis A. Coloma, Martín R. Bustamante. 2006. Atelopus halihelos. The IUCN Red List of Threatened Species 2006: e.T54517A11157024. . Downloaded on 22 May 2018.
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