This species is known from portions of the Serra da Bocaina (part of the Serra do Mar) and Itatiaia (in the Serra da Mantiqueira), in the northern coastal region of São Paulo State and the southern tip of Rio de Janeiro State, in Brazil. It occurs at around 800m asl.
Habitat and Ecology
This is a stream-associated species that occurs near waterfalls in forest. Larvae are found on rocks that are covered with a film of running water, either on exposed rocks, in or next to streams. At night this species often retreats into rock crevices.
Its population status is unknown, and it has not been collected for over twenty years, despite occasional searches.
Its major threats are unknown, but the habitat of the known localities for this species is enclosed within protected areas.
Both areas where this species is found are within protected areas. Given the declines of high-altitude stream-breeding species in other parts of the wet tropics, surveys are urgently needed to relocate it and to assess its status, especially in view of the lack of recent records. Some other Cycloramphus species have declined for unexplained reasons, and chytridiomycosis cannot be ruled out.
Ronald Heyer, Vanessa Verdade 2004. Cycloramphus granulosus. In: IUCN 2014