Last modified: Aug. 7, 2020, 10:57 a.m.
A common species in Belgium.
The egg is deposited on the onderside of a leaf close to a rib.
The mine of this species is very contorted and usually not very long. The frass line is linear and broken throughout the mine.
See also bladmineerders.be
The cocoon is redbrown and is spun on detritus.
The adults fly in two generations: May–June, and July–August.
The monophagous larva makes a leafmine in the leaf of Betula.