Heterarthrus microcephalus

    Description

    The larva of the sawfly Heterarthrus microcephalus mines the leaves of willow with oviposition very near to the leaf tip. It eventually forms a large blotch mine, with little frass. 

    Identification difficulty
    Habitat

    Where the host willow species are present.

    When to see it

    The larval mines can be seen when the host plants are in leaf.

    Life History

    Pupation occurs within the mine in a large, transparent, discoidal cocoon.

    UK Status

    Widespread but not well recorded in 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