This species is known from two sites in western Cameroon: Mount Oku at 2,500 m asl (Perret 1971), and Mount Meletan at 2,200-2,700 m asl in the Bamboutos Mountains of the Bamenda Highlands. However, there is some doubt as to the validity of its type locality from Mount Oku (J.L. Amiet pers. comm. May 2012). The estimated extent of occurrence (EOO) is 963 km², and both sites are considered threat-defined locations.
Habitat and Ecology
This species is found in montane grassland and, during the dry season, retreats to areas near streams and small watercourses in gallery forest, including bamboo forest. Its breeding habits are unknown, though it is likely to breed in streams.
Wolterstorffina mirei was reported to be abundant on Mount Meletan when it was first assessed in 2004. It was last seen on Mount Bamboutos during a survey in October 2009 (N. Gonwouo pers. comm. June 2012), but due to ongoing habitat loss its population is suspected to be decreasing. Assuming that the Mount Oku record pertains to this species, its population is severely fragmented.
Habitat damage is very severe in the Bamboutos Mountains (N. Gonwouo and M. Barej pers. comm. June 2012) and the major threats faced by this species are pasture burning, cattle overgrazing, and forest loss due to agriculture.
IUCN SSC Amphibian Specialist Group 2015. Wolterstorffina mirei. In: IUCN 2014