Last modified: May 5, 2021, 10:47 a.m.
A rather common, though never plentiful, but a local species throughout Belgium.
Head white; forewing fround colour white, pattern consisting of light brown scales: three small costal and one small dorsal striae near the base, a transversal band befor the middle of the wing, a chevron distally and two costal and 1 dorsal striae in the apical area.
Yellowish with light brown head.
At first a rather small, semi-circular or oval tentiform mine on the underside of a leaf, later enlarged and with a series of fine longitudinal folds at the underside. The upperside of the mine shows a multitude of small white dots where the caterpillar has consumed the parenchyma. Only the last instar eats also the central green part way and then the mine is well visible from the upperside as a light green or whitish patch.
See also gracillariidae.net and bladmineerders.be.
The mine is almost never constructed near the margin of a leaf. Sometimes, several mines might occur on the same leaf.
Pupation inside the leaf. The species hibernates in the pupal stage, between leaf litter on the ground.
Two generations a year: May and August.
The species is monophagous on Acer platanoides.