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DRYOPTERIS. Buckler ferns. [Dryopteridaceae]

Ten species of Dryopteris, are recorded in Britain. These include the native Broad Buckler-fern (D. dilatata), Crested Buckler-fern (D. cristata), Hay-scented Buckler-fern (D. aemula), Male-fern agg., (D. filix-mas), Mountain Male-fern (D. oreades), Narrow Buckler-fern (D. carthusiana), Northern Buckler-fern (D. expansa), Rigid Buckler-fern (D. submontana), Scaly Buckler-fern (D. remota) and Scaly Male-fern (D. affinis). Three dipterous miners, the anthomyiids Chirosia betuleti, Chirosia histricina and Chirosia similata, are recorded on Dryopteris in Britain. Elsewhere the anthomyiids Chirosia grossicauda and Chirosia histricina are recorded mining Dryopteris. One non-dipterous leaf-miner is recorded on Dryopteris in Britain (see below)

Key for the identification of the known Diptera mines in Britain.

#> Details of mine unknown. Chirosia similata (Tiensu) [Anthomyiidae]. 1> The larva mines the leaves and stems (Hennig, 1976). Tip of frond rolled upwards into a loose, conspicuous mop-head involving many pinnae; inside a white larva mines along rachis causing it to coil. Tip of frond mined by Chirosia betuleti on Dryopteris filix-mas. Image: Willem Ellis (Source: Nederlandse bladmineerders) Chirosia betuleti (Ringdahl) [Anthomyiidae]. ->Leaf mine. Mine in the frond, not its rolled apex. Mine on upperside. Even if deep still greenish in transmitted light. Mine very large and broad, usually extended to full depth of a single leaf section, The frass lies in a single almost unbroken fine, black line, parallel to the leaf margins. Mines of Chirosia histricina on Pteridum aquilinum. Image: Willem Ellis (Source: Nederlandse bladmineerders) Chirosia histricina Rondani [Anthomyiidae].

Non-dipterous miners recorded on Dryopteris in Britain Psychoides filicivora (Meyrick,1937) Lepidoptera: Tineidae

Last updated 29-Jul-2008  Brian Pitkin

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