It is endemic to Borneo and only known from Mount Api in northern Sarawak, Malaysia, although it might also occur in the adjacent Brunei.

During the day, these frogs are almost uniformly blackish above, whereas during the night the colouration lightens up to light grey.

Fingers are long with broad adhesive disks.

[3] Its natural habitat is submontane forest at elevations of 900–1,300 m (3,000–4,300 ft) above sea level.

There are no known threats to this species residing with the Gunung Mulu National Park, but its restricted range has led to its listing as "Vulnerable" by the International Union for Conservation of Nature (IUCN).