Renter: Snail shells. Empty snail shells (e.g. Helicella) with 1 cell per shell. The closed shells are transported over a distance of up to 3m and then buried into the sandy ground (ca. 3-3,5cm deep).
Nesting material: The shells are closed a few millimetres behind the shell opening with a partition made of chewed leaf pulp; this partition is then used as the base for the thick nest plug which is built by embedding broken gastropod and mussel shells, sometimes also small stones, into a matrix of leaf pulp. The shell surface is not plastered with patches of leaf pulp. (Haeseler, 1997)