Last modified: Feb. 18, 2020, 9:49 a.m.
A very rare species in Belgium. It is probably less reported due to the large overlap with other similar mines on Quercus.
The egg is deposited on either side of the leaf, away from the margin.
The mine is a relative short gallery with a broad frass line.
See also bladmineerders.be
The cocoon is reddish brown.
There are two generations a year. Adults are on the wing from April to May and from the end of July to August.