Wingspan c.16 mm.
Distributed in England and South Wales, with a few scattered records in Ireland, this longhorn species is to be found in wooded and damp fenland areas.
The larvae feed, like others in the group, in a case among detritus and leaf-litter on the ground.
The adult moths fly in June and July, sometimes in the afternoons, but also towards dusk. They resemble other Nematopogon species, but have a noticeable dark mark in the centre of the forewing.