The leaf and stem mines of British flies and other insects
 

(Coleoptera, Diptera, Hymenoptera and Lepidoptera)

by Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds

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AREMONIA. Bastard Agrimony. [Rosaceae]


Only one species of Aremonia is recorded in Britain, the introduced Bastard Agrimony (A. agrimonioides).

Four British miners are recorded on Aremonia.

A key to the European miners recorded on Aremonia is provided in Bladmineerders van Europa.



Key for the identification of the known mines of British
insects (Diptera and non-Diptera) recorded on Aremonia


1a > Leaf-miner: Initially a linear mine which later develops into a conspicuous blotch; frass in two rows in linear section, scattered irregularly in the blotch (Spencer, 1976: 134-5, fig. 237, as potentillae).

Corridor, gradually and considerably widening towards the end. Frass in two rows in the corridor part, further up dispersed irregularly. Pupation outside the mine (Bladmineerders van Europa).

A short broad upper surface corridor leading to a long blotch between veins (British leafminers).

On Agrimonia, Filipendula, Fragaria, Geum, Potentilla, Rubus and Sanguisorba, but not yet on Aremonia, in Britain. On additional Rosaceae elsewhere. Common and widespread throughout Britain. Also recorded in the Republic of Ireland, Europe, Japan, U.S.A. and Canada.

Agromyza idaeiana (Hardy, 1853) [Diptera: Agromyzidae].

1b > Leaf-miner: A long gallery with dispersed frass (British leafminers). Oviposition may be at either side of the leaf, not necessarily close to a vein. The mine is a not very tortuous corridor, not widened in the end. Frass in a broad central line. The mine strongly overlaps with the one of S. splendidissimella (Bladmineerders van Europa).

On Agrimonia, Fragaria, Geum, Potentilla and Rubus, but not yet on Aremonia, in Britain plus Aremonia and Geranium elsewhere. Widespread in Britain and continental Europe.

Stigmella aurella (Fabricius, 1775) [Lepidoptera: Nepticulidae].

1c > Leaf-miner: Oviposition on the leaf underside. There starts an initially strongly contorted narrow corridor with a linear interrupted frass line. This is continued in broad corridor or elongated blotch with dispersed frass. Often a number of mines in a leaf. Pupation inside the mine, in a violet to blackish cocoon (Bladmineerders van Europa).

On Agrimonia eupatoria, but not yet on Aremonia, in Britain and Agrimonia eupatoria and Aremonia agrimonioides elsewhere. Recorded in south-east England. Widespread in continental Europe.

Ectoedemia agrimoniae (Frey, 1858) [Lepidoptera: Nepticulidae].

1d > Leaf-miner: Full depth transparent blotch without a clear preceding corridor, quickly and strongly widening from the start. Frass in sausage-shaped granules. Often several leaflets of a composite leaf each have a mine (Bladmineerders van Europa).

The larvae of sawflies have at least six thoracic legs (although they may be reduced or absent), a head capsule and chewing mouthparts with opposable mandibles but no abdominal legs.

Fenella nigrita larva
Fenella nigrita larva
Image: © Willem Ellis (Bladmineerders van Europa)

On Agrimonia, Potentilla and Rubus, but not yet on Aremonia, in Britain plus remonia, Filipendula, and Fragaria elsewhere. Widespread in Britain including Surrey and West Cornwall. Widespread in continental Europe.

Fenella nigrita Westwood, 1839 [Hymenoptera: Tenthredinidae].



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