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POLYPODIUM. Polypody. [Polypodiaceae]

Three species of Polypodium are recorded in Britain. All are native and include Intermediate Polypody (P. interjectum), Polypody (P. vulgare) and Southern Polypody (P. cambricum). Two dipterous miners, the agromyzids Chromatomyia scolopendri and Phytoliriomyza hilarella, are recorded on Polypodium in Britain, both on P. vulgare. Elsewhere the agromyzid Chromatomyia scolopendri and the anthomyiid Chirosia histricina are recorded mining Polypodium. No non-dipterous miners are recorded on Polypodium in Britain.

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

1> Leaf mine. A short linear mine in single section of a frond. Pupation external. Mine of Phytoliriomyza hilarella on Pteridium aquilinum. Image: Willem Ellis (Source: Nederlandse bladmineerders) Phytoliriomyza hilarella (Zetterstedt) [Agromyzidae]. -> Leaf mine. A long greenish linear mine, frequently following a vein; mines can be up to 10 cm long. Pupation internal. Pupariumwhitish-yellow with minute black spiracles, anterior spiracles projecting through the leaf epidermis. Mines of Chromatomyia scolopendri on Asplenium ruta-muraria. Image: Willem Ellis (Source: Ellis,Nederlandse bladmineerders) Chromatomyia scolopendri (Robineau-Desvoidy) [Agromyzidae].

Last updated 30-Jul-2008  Brian Pitkin

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