Railer Bat has dark wings and blackish patches on its flanks below the wings. It has been recorded in lowland forest and mesic savanna, and small groups roost in tree hollows and building spaces.
The specimen examined on Mount Cameroon had dark wings and conspicuous blackish flank patches between the legs and arms. The paper gives a forearm length of 35–42 mm.
It is recorded mostly in lowland rainforest and secondary forest, but also in mesic savanna and nearby grassland. Small groups roost in tree hollows, under house roofs, and in building cracks.
An extinction-risk assessment has not been added yet.