Fairly common resident. Asplenium scolopendrium, and other Asplenium Sp. and ferns. Flies June/July with larva feeding from August to June at first mining, making pale blotches, then on the sporangia under a frond of harts-tongue fern, in a case camouflaged with sporangia to resemble a sorus. Pupating in the case, often on the midrib. Fresh cases have a keel similar to an upturned boat. Larvae have black head and plate.
Recorded in 28 (20%) of 140 10k Squares. First Recorded in 1887. Last Recorded in 2020. (Data up to end 2020) Additional Stats