Local in woodland, fens, marshes and bogs throughout much of England and Wales. In Hampshire and on the Isle of Wight there are scattered records from all three vice-counties. Wingspan 15-17 mm. This species may be confused with
N. schwarziellus or
N. pilella, but may be recognised by its more rounded wings and more prominent dark mark at the end of the cell of the forewing (MBGBI Vol 1). Larva feeds on dead leaves, living within a movable case.