Cerodontha phragmitidis


    The larvae of the Agromyzid fly Cerodontha phragmitidis mine the leaves of Common Reed (Phragmites australis). The mine takes the form of a large linear shallow blotch in the leaf blade and the larva usually pupates in the leaf. The puparium is a metallic black, with an elongated posterior section. 

    Identification difficulty

    Adult Leafmine

    Recording advice

    Adult: Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.

    Leafmine: Please state the host species, and provide a backlit photograph of the mine, and a photograph of the pupa or larva if present.


    Damp areas with Common Reed (Phragmites australis).

    When to see it

    Mines can be seen in summer and early autumn when the host plant is in leaf.

    UK Status

    True status in Britain is difficult to determine due to lack of records, but the species is believed to be widespread.

    VC55 Status

    Rarely 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