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

N.B. Links to the latest version of 'Leafminers and plant galls of Europe' are being edited

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TRIGLOCHIN. Marsh Arrow-grass. [Juncaginaceae]


Two species of Triglochin are recorded in Britain, the native Sea Arrowgrass (T. maritimum) and Marsh Arrowgrass (T. palustre). The BSBI provide a downloadable plant crib for Triglochin.

Triglochin maritimum is treated as Triglochin maritima and Triglochin palustre is treated as Triglochin palustris by Stace (2010).

Three British miners are recorded on Triglochin.



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


1a > Leaf-miner: A long narrow leaf-mine which winds round the filiform leaves and can penetrate deeper into the parenchyma, becoming invisible. Pupation internal (Spencer, 1976: 230).

Narrow corridor, spiralling around the leaves. Often part of the corridor in the deeper layers of the leaf. Frass in strings. Pupation generally within the mine (Bladmineerders van Europa).

On Triglochin maritimum and Triglochin palustre in Britain and elsewhere. Only recorded from Kent, Dorset, Suffolk in Britain. Widespread in continental Europe.

Liriomyza angulicornis (Malloch, 1918) [Diptera: Agromyzidae].

1b > Leaf-miner: Narrow corridor, spiralling around the leaves; often a part of the mine runs in the deeper parts. Frass in strings, but not in the typical pattern. Pupation as a rule within the mine (Bladmineerders van Europa).

On Triglochin in Britain. On Triglochin maritimum and Triglochin palustre elsewhere. Only known from Suffolk in Britain. Widespread in continental Europe.

Liriomyza latipalpis Hendel, 1920 [Diptera: Agromyzidae].

1c > Leaf-miner: Broad, transparant (full depth) gallery. Pupation external. (Bladmineerders van Europa).

On Triglochin in Britain and elsewhere. Distribution in Britain unknown. Widespread in continental Europe.

Scrobipalpa stangei (E. Hering, 1889) [ Lepidoptera: Gelechiidae].


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