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SEDUM. Stonecrops, Roseroot and Orpine. [Crassulaceae]

Twenty-nine species of Sedum are recorded in Britain. These include the native Biting Stonecrop (S. acre), Roseroot (S. rosea) and Orpine (S. telephium) and the introduced Pink Stonecrop (S. cepaea). Three dipterous miners, the agromyzids Phytomyza rhodiolae and Phytomyza sedicola and the syrphid Cheilosia semifasciata, are recorded on Sedum in Britain. Elsewhere the polyphagous agromyzids Liriomyza bryoniae and Phytomyza sedicola and the syrphid Cheilosia semifasciata are recorded mining Sedum. No non-dipterous miners are recorded on Sedum in Britain.

Biting Stonecrop - Sedum acre.

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

1> A shallow, irregular linear mine which can develop into a secondary blotch. Pupation internal, the puparium loose in the mine. Puparium brown Phytomyza sedicola Hering [Agromyzidae]. -> Linear mine, although the maze of galleries formed sometimes appears to form a false blotch. Pupation internal, at the end of the mine or external. Phytomyza rhodiolae Griffiths [Agromyzidae]. -> Full depth mine; in parts of the mine the parenchyma remain untouched. The larva enters and exits the leaf by means of an oval opening of 3-5 mm at the base, near the leaf edge. Pupation external. Mine of Cheilosia semifasciata on Sedum telephium. Image: Willem Ellis (Source: Nederlandse bladmineerders) Cheilosia semifasciata Becker [Syrphidae].

Last updated 29-Jul-2008  Brian Pitkin

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