A recently (2009) new species for Belgium.

The larva causes a tentiform mine on the lower surface of the leaf on Teucrium chamaedrys and T. montanum, the upper convex surface is often purplish brown while the lower surface is white to pale green.They pupate in a cocoon within the mine but they may leave the mine to live between spun leaves on the food plant. Hibernates as a pupa.

The adults fly in two generations: mainly during May and June and again in August.