Last modified: Feb. 26, 2021, 11:48 a.m.
A fairly common species in Belgium, more observed in the northern part of the country.
See also bladmineerders.be
Initialy the mine is a narrow gallery, often contorted and later following a vein, the final chamber is often turned away at right angles, the frass fills the gallery.
Later the larva eats out windows from either side, leaving the veinlets.
Pupates in a greyish ochreous cocoon spun amongst debris. The adults come to light.
The adults fly in one generation a year: during May and early June.