This species is known only from three small areas of western and south-western Cameroon: between Yabassi and Nkongsamba, at low elevations (apparently, it is absent to the west of Nkongsamba); Mount Yuhan in Korup National Park; and Mount Nta Ali in the Mamfe basin. It occurs mainly below 1,000m asl.
Habitat and Ecology
It lives and breeds in and near rivers and slow-flowing streams in lowland and hilly closed-canopy forest. Males call from among dead leaves on the banks close to water.
It is a common species, certainly more so than Astylosternus laurenti.
It is severely threatened by loss of habitat within its very small range, primarily due to human settlement and agricultural encroachment.
It occurs in Korup National Park, but further protection of the remaining forest habitat is required.
Jean-Louis Amiet 2004. Astylosternus fallax. In: IUCN 2014