The wingspan is 9–11 mm.
The larvae feed on Myosotis sylvatica. They mine the leaves of their host plant. The mine starts in a low leaf and has the form of a short, lower-surface corridor that quickly widens into a full depth, transparent blotch. Some silk is deposited in the mine. Before hibernation, the larvae make a new mine, consisting of a fairly broad corridor along the midrib, lined with silk. After overwintering, the larvae make several new mines. Pupation takes place outside of the mine, in the soil. Larvae can be found from September to May of the following year.
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