Last modified: Oct. 21, 2021, 10:35 a.m.
A very local and very rare species in Belgium, occurring almost exclusively in the limestone Calestienne area.
Head dark brown; forewing ground colour brown; white pattern consisting of a rahter short basal line, finely edged with dark brown scales; a patch of white scales in the basal area of the dorsum, one transverse band edges with dark brown scales on both sides, three costal and two dorsal striae also edged on both sides with dark brown scales; a small patch of very dark brown to blackish scales in the apical area.
A tentiform mine on the underside of a leaf, strongly inflated and almost folding the entire leaflet. Some longitudinal folds on the underside. The upper surface is mottled white in the beginning but turn into purplish brown at a later stage and tenated plants become very obvious.
See also gracillariidae.net and bladmineerders.be.
A very flimsy cocoon consisting of just some spun threads. Pupa light brown.
The last instar pupates inside the flimsy cocoon. The species hibernates in the pupal stage among leaf litter on the ground.
Two generations a year: April–May and August–September.
In Belgium, the mines are most of the time found on Vicia sepium. The species has also been recorded on other plants, like: Lathyrus, Lotus, Medicago and *Trifolium".
Limestone areas where the larval host plant grows in the shade of higher vegetation or under trees.