Lighthouse Gall - Rondaniola bursaria


    The midge Rondaniola bursaria causes galls to form on the leaves of Ground-ivy (Glechoma hederacea). The gall takes the form of a hairy cylinder up to 4 mm tall, often several on the upper surface of a leaf. The galls are initially green, later light red or brown. Each gall contains a single larva. Galls fall off the leaf in late summer leaving a neat, circular hole. The gall is recorded more frequently than the midge.

    Identification difficulty

    Adult Gall


    May occur wherever Ground-ivy is found.

    When to see it

    Galls best looked for from late June to August.

    UK Status

    Widespread in the southern half of Britain.

    VC55 Status

    Status in Leicestershire and Rutland not known.

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    Leicestershire & Rutland Map

    MAP KEY:

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

    UK Map