Phytomyza ilicis agg.


    Phytomyza ilicis is an Agromyzid fly that causes galls to form on the leaves of Holly, however there may be other species producing similar mines so detailed examination is needed (see ID guidance below). If this detailed examination has not taken place records should be submitted to this aggregate page.

    Identification difficulty

    Adult Leafmine (for aggregate records)

    ID guidance

    There is now the possibility of a second leafminer on Holly. The anterior spiracles of the puparium, which usually penetrate the epidermis of the leaf, can be used to separate Phytomyza ilicis from Phytomyza jucunda and some of the Nearctic spp., however, these need to be examined under a microscope, something not every recorder possesses. It may also mean that the adult may need to be reared and retained for examination. Unless this examination has taken place records should be submitted to this aggregate page.


    Anywhere that the host plant grows.

    Life History

    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.

    UK Status

    Common and widespread in Britain.

    VC55 Status

    Common in Leicestershire and Rutland

    Leicestershire & Rutland Map

    MAP KEY:

    Yellow squares = NBN records (all known data)
    Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

    UK Map