This species’ geographic range is in the Serra do Mar in the state of Santa Catarina, Brazil. It has an altitudinal range of 300-800m asl.
Habitat and Ecology
It was found in Atlantic forest fragments, at fast-running streams rushing over rocks. Adults and juveniles were found in the water and larvae were attached to rocks in the splash zone.
It was last collected in the late 1970s and recent surveys have failed to record it.
The major threats to this species are unknown. It has apparently disappeared from seemingly suitable habitat. It is possibly threatened by tourism.
Given the declines of high-altitude stream-breeding species in other parts of the wet tropics, surveys are urgently needed to relocate this species and to assess its status, especially in view of the lack of recent records. Some other Cycloramphus species have declined for unexplained reasons, and so it is an urgent priority to rediscover populations of this species.
Ronald Heyer, Débora Silvano, Bruno Pimenta 2004. Cycloramphus asper. In: IUCN 2014