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Lyonetia clerkella (Linnaeus, 1758)

A common species throughout Belgium.

The young larva makes a long, sinuous leaf-mine mainly on rosaceous trees or bushes like Prunus cerasus, or on Betula. It pupates in a silken cocoon which is suspended by silken threads on either surface of a leaf. The imago hibernates, often in thatch or evergreens.

The adults fly in three generations a year: June, August and from October till April. They are mainly active at dusk but occasionally come to light.

ID mine: a long, narrow tortuous gallery which frequently crosses the midrib, frass linear, exit hole on upperside. The long and flattened larva makes that the vacated larval chamber is proportionally longer and readily distinguish it from nepticulid mines. On the place of the oviposition (it never starts in the midrib) remains a small discoloured scar which means that the egg is laid in the leaf (with an ovipositor) and not on the leaf in the way Nepticulidae do (egg shell visible).


Belgium, Antwerpen, Kapellen, 09 August 2004.
(Photo © Chris Steeman)
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Comments to Willy De Prins or Chris Steeman
© Flemish Entomological Society