Last modified: Feb. 18, 2020, 9:37 a.m.
An uncommon species in Belgium.
The egg is deposited on the underside close to a rib.
The mine is a long slender gallery that hardly widens. The black frass line is fine and central throughout the mine.
See also bladmineerders.be
The cocoon is yellow to pale brown.
The adults fly in one generation a year; from late April towards early June.