Nationally scarce (Na) in bogs and damp woodland in widely separated localities throughout Britain and Ireland. In Hampshire reported from Matley Bog in 1979 and 1981, but there have been no further records. Not recorded from the Isle of Wight to date. Wingspan 6.5-9 mm. The strong serrations on the antenna, from which it is named, are characteristic. Larva mines leaves of Heath Sedge and Wood Sedge.