This Bornean endemic occurs at a number of sites within Kinabalu National Park and at other sites in the Crocker Range south of Kinabalu in Sabah (Malaysia); it is also known from Gunung Mulu National Park in Sarawak. The altitudinal range in Kinabalu is 600-950m asl (Malkmus et al. 2002), and its overall altitudinal range is 750-1,600m asl.
Habitat and Ecology
Adults are found on the floor of montane forests and move to clear, rocky mountain creeks to breed. The larvae cling to rocks in torrents in these streams and presumably feed on lithophytes. It appears not to be able to survive in modified habitats.
This species is abundant at most locations where it has been reported (such as the Crocker Range).
Logging in the submontane and montane forests could potentially lead to siltation of the streams needed for larval development and result in loss of the lithophytes.
The species is known to be present in the Kinabalu and Gunung Mulu National parks, both of which are reasonably well managed; however, further protection of the remaining forest habitats, and continued management of the existing protected areas, are needed. Additional surveys of potentially suitable sites in Kalimantan are required to establish whether this species occurs there.
Robert Inger, Indraneil Das, Robert Stuebing, Maklarin Lakim, Paul Yambun 2004. Ansonia platysoma. In: IUCN 2014