Last modified: Jan. 17, 2020, 2:58 p.m.
A common species throughout Belgium, but sometimes confused with the mines of Stigmella centifoliella.
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.