This species is known only from New Britain Island, in the Bismarck Archipelago, Papua New Guinea. It has so far been confirmed only at two localities (Brown et al., 2006): near Sulu and Silali Villages in the foothills of the Nakanai Mountains, West New Britain (Foufopoulos & Brown 2004); and Wanui, East New Britain (near Sampun Village (05° 21.638'S, 152° 05.266'E)). It has been found at 300–500m a.s.l. It is likely to occur more widely.
Habitat and Ecology
Both known sites are in primary rainforest. These frogs call from elevated perches (leaves and branches) as high as 2m above the ground. They presumably breed by direct development without dependence upon aquatic habitats. There is no information on whether or not it can adapt to heavily degraded habitats, but some closely related species are very adaptable (S. Richards, pers. comm.).
There is little information on its abundance, as it had previously been confused with Platymantis schmidti. However, at Wanui it was 8-10 times more abundant that P. schmidti, which appears to be more common at lower elevations.
No information is available on threats to this species. If it is dependent upon undisturbed forest, it could be impacted by ongoing forest clearance on New Britain.
It has not been recorded from any protected areas, though a protected area is planned for the Wanui site. Surveys are needed to determine its distribution, ecological requirements and conservation needs.
Johannes Foufopoulos, Stephen Richards 2008. Cornufer adiastolus. In: IUCN 2014