Last modified: Feb. 19, 2021, 1:50 p.m.
A not so common species in Belgium. Populations have declined because of the Dutch elm disease.
The mine is a long sinuous gallery mostly following the leaf margin. The frass pattern is variable but regularly coiled.
See also bladmineerders.be
Pupation in a dark greenish grey cocoon among leaf litter.
Egg is laid on either side a leaf.
The adults fly in two generations a year: in May and August.
The yellowish larva makes a leafmine on Ulmus.