This species is known only from the type locality (Rio dos Cedros) in Santa Catarina State, Brazil, from 300-350m asl.
Habitat and Ecology
It is found in the rainforest, in fast-flowing rocky streams. It reproduces in streams and the larvae are found on rocks in the splash zone.
Its population status is unknown. It was last collected in the late 1970s, and recent visits to type locality have failed to detect this species.
Habitat loss due to logging and development of hydroelectricity infrastructure is a significant threat.
It does not occur in any protected areas, so the creation of new protected areas and research actions are needed. 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 2004. Cycloramphus cedrensis. In: IUCN 2014