Ectoedemia heckfordi van Nieukerken, A & Z Laštuvka, 2010
Egg at the underside, against a vein or the leaf margin. The mine begins as a short, highly contorted corridor, crammed in a small space, that abruptly widens into an elongate blotch. The corridor is almost completely filled with frass; in the blotch the frass lies in two stripes along the sides. Pupation external.
Vacated mines, probably of the same species, have been found on Q. robur.
Larvae from the beginning of August to early September.
Not known from the Benelux countries (Fauna Europaea, 2010).
distribution within Europe
Southern England (Devon).
Most mines on seedling or saplings, also on low branches, always in the shade.
van Nieukerken, A & Z Laštuvka (2010a).