Nationally scarce (Na) in saltmarshes throughout much of England. In Hampshire and on the Isle of Wight recorded only from the saltmarshes in the south-east of the county and on the Island. Wingspan 8.5-13 mm. Like many of the Coleophora, imagines are virtually impossible to identify without recourse to dissection, and the larvae, which live in cases of characteristic form and which can sometimes be found on the foodplant, may be easier to identify by comparison against a reference collection. Larva feeds on seeds of Sea-purslane, Grass-leaved Orache and Spear-leaved Orache, living within a movable case.