This species occurs below 700m asl in central and north-eastern Borneo in Kalimantan (Indonesia), Sabah and Sarawak (Malaysia), and Brunei Darussalam. It also occurs on Tawitawi Island in the Sulu Archipelago of the Philippines, where a record of this species (Diesmos and Leong pers. comm.) was previously incorrectly assigned to Microhyla annectens.
Habitat and Ecology
Adults occur in the litter of lowland primary rainforest, and breed in small, clear streams.
As the species is easy to find when it is breeding, it is presumed to be abundant.
The main threat to this species is deforestation through clear-cutting.
It has been recorded from at least three protected areas including Lanjak Entimau Wildlife Sanctuary (Sarawak) and Batu Apoi National Park (Brunei).
Red List Status
Near Threatened (NT)
Listed as Near Threatened since although this species is still relatively widely distributed, it depends on areas of undisturbed forest habitat, and so its Extent of Occurrence is probably not much greater than 20,000 km2, and the extent and quality of its habitat is declining very rapidly due to widespread forest loss within its range, thus making the species close to qualifying for Vulnerable.
Robert Inger, Djoko Iskandar, Indraneil Das, Robert Stuebing, Maklarin Lakim, Paul Yambun, Mumpuni, Arvin Diesmos, Leong Tzi Ming 2004. Microhyla petrigena. The IUCN Red List of Threatened Species 2004: e.T57889A11687848. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T57889A11687848.en .Downloaded on 13 November 2018