Last modified: Feb. 19, 2021, 12:22 p.m.
A very rare species in Belgium, probably overlooked.
Egg on underside of the leaf.
The mine starts as a long gallery allmost completely filled with black frass, abruptly it changes to a large round blotch with black frass concentrated in the middle of the mine.
See also bladmineerders.be
It pupates in a orange to pale yellow cocoon inside the mine.
The adults fly in one extended generation a year: from late April until August.
The larve feeds on Vaccinium vitis-idaea.