A very rare species in Belgium, probably overlooked.

The polyphagous larve feeds on Vaccinium vitis-idaea. The mine starts as a long slender gallery, circling or crossing the leaf with frass in a thick central line leaving clear margins and it suddenly widens into a large blotch with the frass piled in the middle. It pupates in a orange to pale yellow cocoon.

The adults fly in one extended  generation a year; onwards from late April until August.