Syn.: Pannaria nebulosa (Hoffm.) Nyl., Lecanora brunnea auct. belg., non (Sw.) Ach.

On sandy and well-drained soil, over natural outcrops or on road banks.

Belgium: Brab.: RR (†<1900), Mosan: RRR (†1890), Ard.: R (†1894), Lorr.: RRR (†1902).

Luxembourg: - .

France: - .

Now extinct throughout the area of study.

Lit.: Sérusiaux (1984: 83-84).