Extinct in the British Isles, formerly in hedgerows and woodland margins in parts of Cambridgeshire; also formerly in Essex, where not seen since 1890. Unlikely to be recorded in Hampshire or on the Isle of Wight. Wingspan 12-15 mm. Reminiscent of G. lunulana but distinguished by the short medio-dorsal blotch which extends only to the submedian fold on the forewing [Bradley]. Larva feeds within damaged bark of Elm.