This species is known from south-western and north-eastern Sarawak (Malaysia) and Serasan (north-western Kalimantan, Indonesia), and might also occur in north-western Kalimantan (Indonesia) and south-western Sabah (Malaysia), in Borneo. It probably occurs more widely than current records suggest. It is a lowland species present at elevations below 200m asl.
Habitat and Ecology
It occurs in the leaf-litter of hilly lowland primary moist forest. The large eggs are probably deposited in very small rain pools.
There is no information on the population status of this species.
The major threat to this species is habitat loss due to logging. The northern part of the range now consists of disturbed habitat (largely deforested) and it is unclear whether or not the species still survives there.
The species is present in Kubah National Park, although the southern section is facing increasing pressure from encroaching logging activities. There is a need for improved habitat protection of sites at which this species is known to occur.
Robert Inger, Indraneil Das, Robert Stuebing, Maklarin Lakim, Paul Yambun 2004. Pelophryne guentheri. In: IUCN 2014