Last modified: March 8, 2021, 12:45 p.m.
A very rare species in the southern part of Belgium, confined to the Calestienne area.
Full depth mine. The corridor forms a loose spiral, sides are irregularly scalloped. Frass in a broad central line, part of it is ejected through a small opening at the beginning of the corridor. Later it becomes a blotch mine, generally adjacent to the leaf margin.
See also bladmineerders.be
When the larva leaves the mine, it lives free among spun leaves. The adults come sparsely to light.
The adults fly from mid July till late September.