This species is known from the eastern state of São Paulo, in Brazil. It has been recorded from 800-1,000m asl.
Habitat and Ecology
This species occurs on stones in primary and good quality secondary forest streams. Larvae are found on rocks that are covered with a film of running water, either on exposed rocks in or next to streams. It has not been recorded outside forested habitat.
It is a reasonably common species.
Air and water pollution from industry, and disturbance of the species' habitat by touristic activities are major threats.
Its range includes a few protected areas. More research into the species' Extent of Occurrence, and population status is needed, in particular to determine whether or not its range is much larger than currently known.
Red List Status
Least Concern (LC)
Listed as Least Concern since, although its Extent of Occurrence is probably less than 20,000 km2, it occurs in an area of extensive, suitable habitat which appears not to be under threat, it has a presumed large population, and it is unlikely to be declining fast enough to qualify for listing in a more threatened category.
Ronald Heyer, Vanessa Verdade 2004. Cycloramphus dubius. The IUCN Red List of Threatened Species 2004: e.T56366A11467812. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T56366A11467812.en .Downloaded on 21 January 2019