Last modified: March 20, 2021, 10:22 a.m.
A new species for Belgium in 2014 in NA. Hitherto a very rare species, mostly found as a case on the food plant in the southern part of the country.
This is a rather small Coleophora species: 9–12 mm. It is coloured light-ochreous with the apex somewhat darker. The antennae are white-brown ringed till the tip.
The young caterpillar makes an oval to rectangular blotch mine, measuring a few mm, from where it makes the first tube. Subsequently, it constructs a second tube at the leaf edge in a way the tube gets a sawn dorsal keel. Later on, the caterpillars simply make blotch mines which are strikingly white in the beginning!
See also bladmineerders.be.
The first case is cut out of an oval mine in the centre of the leaf. Later on, the other cases are constructed with cut out material along the leaf margin and, therefore, have a serrate dorsal keel.
The larva lives from August till May, hibernating in between.
One generation a year: from the end of May till the beginning of August.
This species is found in the south of Belgium where Prunus spinosa is more common.