Last modified: Oct. 4, 2020, 10:01 a.m.
A local and rare species in Belgium, thus far (2020) only recorded from Flanders.
A small species; head brown with some mixed white hairs; forewing ground colour brown; white pattern consisting of a basal line, completely edged with dark brown scales; a patch of white scales at the dorsum near the base; four large costal and three large dorsal, triangular striae, all edged basally with dark brown, almost black scales; a black spot in the apical area.
Yellowish to yellow with a light brown head.
A tentiform mine on the underside of a leaf; in smaller leaves the mine occupies the whole leaf area. Underside with some fine longitudinal folds. The upperside of the mine yellowish. The later instars apply spinning in the mine so that the leaf contracts into a tube-like structure. The black frass is concentrated in one corner of the mine.
See also gracillariidae.net and bladmineerders.be.
Not a real cocoon but a flimsy spinning in the opposite corner of the mine from where the frass is stored.
The species hibernates in the pupal stage, inside the mine among leaf litter on the ground. After emergence of the adult, the pupal skin protrudes through the mine.
The adults fly in two generations a year: during May and August.
The species is monophagous on Salix repens.
Sandy, xerothermic habitats where the larval host plant grows.