Vulnerable (proposed as a future Red Data Book species) on downland in parts of south-eastern England, as far west as Dorset. Records from other counties are probably based on misidentification of
M. aprilella, which was not recognised as British until 1981 (MBGBI Vol 4 part 2). In Hampshire recorded just once, at Micheldever Spoil Heaps in 1971. Not recorded from the Isle of Wight to date. Wingspan 14-24 mm. The most likely confusion species is
M. aprilella, which see for differences. Larva feeds within seedheads of Dwarf Thistle, over-wintering in a silken chamber.