Last modified: April 23, 2019, 12:44 p.m.
A common species throughout Belgium.
The mine is a long, and gradually widening gallery. The initial gallery is completely filled with frass. Later on the frass pattern can change abruptly from a thick central line into coiled frass, allways leaving clear margins.
See also bladmineerders.be
It pupates in a red to redbrown cocoon, generally spun on the surface of a leaf or a leaf-stalk.
The adults fly in two generations a year; during May and August.