Aceria cephalonea

    Description

    Aceria cephalonea is a mite that causes galls to form on the leaves of Sycamore. The galls are red, less than 3 mm high and have a rounded apex. The galls are seen more often than the mite.

    Similar Species

    Aceria macrorhyncha

    Identification difficulty

    Adult Gall

    ID guidance

    Only on Sycamore.  Aceria cephalonea galls are small - less than 3mm - and with rounded tips.  Aceria macrorhyncha galls are up to 6mm tall, and with pointed tips.  Intermediates do occur, and these can't be identified from the galls.

    Recording advice

    Some indication of the size of the gall is helpful, and a close-up photo.  The host plant should be specified in the comments - e.g "Gall on Sycamore, 3mm high"

    Habitat

    On Sycamore

    When to see it

    Galls can be seen when Sycamore is in leaf.

    UK Status

    Widespread and fairly frequent in Britain.

    VC55 Status

    Fairly frequent 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