Last modified: April 23, 2019, 12:44 p.m.
Rather common in many areas of Belgium.
See also bladmineerders.be
The adults fly in two generations; from end of April till May, and again during July and August. In Belgium most specimens have been observed in July. They occasionally come to light.
The larvae live gregariously in a slight web, on the leaves of Sedum telephium and related cultivars, possibly also on other plants. Pupation in a cocoon amongst leaf-litter or spun up under a flower-head of the foodplant.