Last modified: Feb. 19, 2021, 11:53 a.m.
A very rare species in Belgium, only known from the southern provinces.
Usually the egg is deposited close to the midrib on the underside.
The initial mine is contorted and filled with reddish frass. Later the gallery widens into a elongated blotch with dispersed black frass. The mine is usually small and compact.
See also bladmineerders.be
The cocoon is brown.
The adults fly in one generation a year during May and June.