This species occurs in southeastern Brazil in the States of Sao Paulo and Rio de Janeiro, from sea level to 1,800m asl. It used to be found at the biological station at Boraceia in Sao Paulo, but can no longer be found there; it was last seen around 1980, despite subsequent searches. It is, however, still found in other places.
Habitat and Ecology
It lives in and near rocky streams in primary and secondary forest. It does not occur in open areas. It breeds in streams and the eggs are placed in crevices under rocks and stones.
It is a very common species. The population at Boraceia disappeared (last seen in 1979), despite apparently having suitable habitat remaining, as well as the population at Santa Teresa. This decline is reminiscent of disappearances of stream-breeding, high-altitude frog species in other parts of the wet tropics.
The major threats are probably related to habitat loss due to logging, human settlement, tourism and fire. It is perhaps also affected by soil and water due to agricultural and industrial practices. However, it appears that the species might also have experienced some unexplained declines in areas of suitable habitat in the higher altitude parts of its range. Such declines are potentially ominous, and chytridiomycosis cannot be ruled out.
It occurs in many protected areas. Surveys are urgently needed to determine whether or not this species is declining in the higher altitude parts of its range, even where suitable habitats survive.
Red List Status
Least Concern (LC)
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.
Carlos Frederico da Rocha, Monique Van Sluys 2004. Crossodactylus gaudichaudii. The IUCN Red List of Threatened Species 2004: e.T56352A11466849. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T56352A11466849.en .Downloaded on 13 December 2018