Oscaecilia bassleri


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Oscaecilia bassleri
Species Authority: (Dunn, 1942)
Common Name/s:
English Pastaza River Caecilian
Caecilia bassleri Dunn, 1942

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2004
Date Assessed: 2004-04-30
Assessor/s: Javier Icochea, Luis A. Coloma, Santiago Ron, Diego Cisneros-Heredia, Mark Wilkinson
Reviewer/s: Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson, Neil Cox and Bruce Young)
Listed as Least Concern in view of its wide distribution, presumed large population, and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category.

Geographic Range [top]

Range Description: This species occurs in the western Amazon basin and on the lower Amazonian slopes of the Andes at 100-800m asl. It has been recorded from Ecuador (Napo and Pastaza States) and eastern Peru (Departaments of Amazonas and Madre de Dios). It possibly occurs in the Putumayo and Amazonas Departments of Colombia (Lynch, 1999; Acosta-Galvis, 2000) and it is suspected to occur in Bolivia (De la Riva et al., 2000).
Ecuador; Peru
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The population status of this species is unknown.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: It is a subterranean species of primary tropical rainforest. At Lago Agrio, Ecuador, specimens were obtained during clearing of primary forest by bulldozers (Duellman, 1978). It is not known whether or not it can adapt to modified habitats. Its breeding habits are unknown.
Systems: Terrestrial

Threats [top]

Major Threat(s): There is no information on threats to this species. It occurs in an area of low human impact, and so it is unlikely to be significantly threatened.

Conservation Actions [top]

Conservation Actions: In Ecuador this species has been recorded from Yasuni National Park, and it possibly also occurs in Limoncocha Reserva Biológica.
Citation: Javier Icochea, Luis A. Coloma, Santiago Ron, Diego Cisneros-Heredia, Mark Wilkinson 2004. Oscaecilia bassleri. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <>. Downloaded on 18 April 2014.
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