This species is endemic to Borneo and has been reported only from several lowland points in Sarawak (Malaysia). It probably occurs more widely than current records suggest, especially in areas between known sites, although the amount of available habitat is rapidly declining. It is likely to be found in north-western Kalimantan (Indonesia), but this has not yet been confirmed. It is present at elevations below 300m asl.
Habitat and Ecology
It lives in leaf-litter of the forest floor, but has also been found in tree holes. It has not been found outside forest. Nothing is known of its breeding habits.
There is no information on the current population status of this secretive species.
The major threat is forest loss and fragmentation, due to clear-cutting.
It is not presently known from any protected areas, and improved protection and preservation of rainforest habitats is needed in Sarawak and Kalimantan.
Red List Status
Listed as Vulnerable, because its Extent of Occurrence is less than 20,000 km2, its distribution is severely fragmented, and there is a continuing decline in the extent and quality of its forest habitat.
Robert Inger, Djoko Iskandar, Indraneil Das, Robert Stuebing, Maklarin Lakim, Paul Yambun, Mumpuni 2004. Gastrophrynoides borneensis. The IUCN Red List of Threatened Species 2004: e.T57818A11687962. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T57818A11687962.en .Downloaded on 20 January 2019