Fenusa dohrnii

    Alternative names
    European Alder Leafminer

    The larvae of the sawfly Fenusa dohrnii mine the leaves of various species of Alder (Alnus sp.). The mine takes the form of a large brownish blotch, without an initial corridor. Usually the mine starts near a vein axil, and expands towards the leaf margin. The mine mostly remains enclosed by two thick lateral veins. The adult sawfly is largely black in colour but it is the larval mines that are more regularly recorded.

    Identification difficulty

    Adult Leafmine

    ID guidance

    Wherever Alder occurs.

    When to see it

    When Alder is in leaf.

    UK Status

    Widespread in Britain but infrequently recorded.

    VC55 Status

    Rare or under recorded in Leicestershire and Rutland.

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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