Last modified: Feb. 18, 2020, 9:35 a.m.
An uncommon species in Belgium, only known from the southern provinces.
The egg is deposited on the underside of a leaf very close to a vein or sometimes on the petiole.
The mine starts as a slender gallery along a rib, leafmargin or petiole. Gradually it widens to a false blotch becouse of the windings that are so close to each other. In the initial mine the red brown frass is linear, second half is coiled and at last it's more dispersed.
See also bladmineerders.be
It pupates in a reddish brown cocoon.
The adults fly in one generation a year; during May and early June.
Only found on Crataegus species.