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 30 (21%) of 140 10k Squares. First Recorded in 1887. Last Recorded in 2022. (Data up to end 2022) Additional Stats

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