The larvae of the Agromyzid fly Phytomyza ilicis mine the leaves of Holly. Previously it was thought that there may be other species producing similar mines so records were placed within an aggregate, however recent research has shown that in the UK there is only one species.
Anywhere that the host plant grows.
Phytomyza ilicis lays its eggs in May or June, at the base of the petiole of a young leaf (on the underside). Larva initially feeds in mid-rib, later producing characteristic irregular upper surface linear-blotch. Pupation is internal.
Common and widespread in Britain.
Common in Leicestershire and Rutland
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015