Key for the identification of the known mines of British
insects (Diptera and non-Diptera) recorded on Leymus
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1#> Leaf-miner. Details unknown.
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Hosts in Britain unknown. On Elymus and Leymus elsewhere.
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Elachista
littoricola Le Marchand, 1938 [Lepidoptera: Elachistidae]
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1a > Leaf-miner: Broad
elongated mine; the form is dependent of the leaf form of the host
plant. Frass green. Usually a number of larvae together in a mine.
Pupation in the mine. |
On Bromopsis, Dactylis, Elymus and Phalaris, but not yet on Leymus, in Britain
and additional grasses, including Elytrigia, elsewhere. Widespread in Britain. Also
recorded in the Republic of Ireland. Widespread and common in continental Europe. Also recorded in Japan, U.S.A. and Canada.
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Cerodontha
incisa (Meigen, 1830) [Diptera: Agromyzidae]. |
1b > Leaf-miner: Upper-surface
corridor, generally in the upper half of the blade, running up to
the leaf tip, usually occupying more then half the width of the
leaf. Frass in green stripes at either side of the corridor. Never
more than one larva in a mine. Puparium within the mine, metallic
black, not anchered with a string of silk. |
On Ammophila and Elymus, but not yet on Hordeum, in Britain and additional grasses including Elytrigia,
elsewhere. Known only from Norfolk and Elgin in Britain. Widespread in continental Europe. Also recorded in Canada and the U.S.A.
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Cerodontha
superciliosa (Zetterstedt, 1860) [Diptera: Agromyzidae]. |
1c > Leaf-miner: In autumn the larva makes a narrow corridor a few cm in length,
in which it hibernates. In March it moves to a new leaf. Here a
transparent, full depth mine is made that descends from the leaf
tip, and occupies the entire width of the blade. Most frass is concentrated
in the oldest, highest, part of the mine. The larva may leave its
mine and restart elsewhere. Pupation outside the mine |
Mine of Elachista argentella on Dactylis glomerata
Image: © Ben Smart (British leafminers) |
On Dactylis glomerata, but not yet on Leymus,
in Britain. On numerous grasses including Leymus elsewhere. Widespread in Britain and continental Europe. Also
recorded in the Republic of Ireland.
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Elachista
argentella (Clerck, 1759) [Lepidoptera: Elachistidae]. |