Last modified: Sept. 17, 2019, 11:11 a.m.
Known from many areas in Belgium, but never common.
See also bladmineerders.be
The adults fly from mid May till the end of June. The moths are active during the day; they prefer bright sunshine.
The young larva makes a circular blotch mine in the leaves of Vaccinium myrtillus, Rubus chamaemorus, Swida or Prunus spp. Later on it constructs a flat case cut from the blotch and drops to the ground. This first case is replaced by a bivalved case made from two oval pieces of dead leaf. The caterpillar feeds on dead leaves. Pupation in the case attached to some object on the ground.