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).
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.
The population status of this species is unknown.
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.
In Ecuador this species has been recorded from Yasuni National Park, and it possibly also occurs in Limoncocha Reserva Biológica.
Javier Icochea, Luis A. Coloma, Santiago Ron, Diego Cisneros-Heredia, Mark Wilkinson 2004. Oscaecilia bassleri. In: IUCN 2013