Last modified: June 6, 2020, 9:57 a.m.
A very rare and extremely local species in Belgium, only discovered in 2013 on a south facing slope at Aywaille (LG).
Length 7–11 mm, width 1–2 mm, tubular, covered with fine grains of sand and plant particles, mostly also some debris of small insects, mainly at the fore-end till one quarter of the entire case. The case may resemble the one of Dahlica triquetrella, but the caterpillar of that species has a reddish head capsule.
The larvae live very well hidden in cracks of rocks or walls.Their cases, having the same colour of stone, are hardly discernable.
Both sexes have wings. The adults live only one day and don't feed, they can fly but only for short distances.
One generation a year: late May to late July.
Xerothermic rocky slopes, mainly south facing.