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TROLLIUS. Globeflower. [Ranunculaceae]  .

Globeflower (T. europaeus) is the only species of Trollius recorded in Britain. It is a native species and is is protected in Northern Ireland under Schedule 8 of the Wildlife (Northern Ireland) Order, 1985. Three species of diptera, the agromyzids Phytomyza trollii, Phytomyza trolliiophila and Phytomyza troliivora, are recorded mining Trollius in Britain. Elsewhere the agromyzids Phytomyza trollii, Phytomyza trolliiophila and Phytomyza troliivora are recorded mining Trollius. One non-dipterous leaf-miner is recorded on Trollius in Britain (see below).

Globeflower - Trollius europaeus

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

1> Primary blotch mine tending to fill a lobe of the palmate leaf. Near the beginning of the mine, the frass is concentrated in roughly concentric rings to form a dark spot and elsewhere the frass is arranged in loose series of lines and arcs. Mines often appear rusty and mottled. Larva leaves the mine through the lower surface to pupate externally, presumably in the soil. Phytomyza trolliivora Hering [Agromyzidae]. ->Linear mine, possibly forming a secondary blotch. 2. 2> Simple white linear mine; frass deposited in scattered black spots. Pupation external. Puparium black Phytomyza trollii Hering [Agromyzidae]. -> Closely winding linear mine; the adjoining sections usually forming a secondary pseudo-blotch; frass variably coloured and in diffuse patches. Pupation internal in a 'pupal cradle'. Phytomyza trolliiophila Hering [Agromyzidae].

Non-dipterous miners recorded on Trollius in Britain Pseudodineura enslini (Hering, 1923) Hymenoptera: Tenthredinidae

Last updated 21-Mar-2008  Brian Pitkin

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