Syn.: Catapyrenium squamulosum (Ach.) Breuss, Dermatocarpon rufescens auct. p.p., non (Ach.) Th. Fr., D. trapeziforme auct. p.p., non (J. König) Trevis.

On calcareous soil, mainly in Mesobromion and Xerobromion communities.

Belgium: Mosan: R, probably overlooked.

Luxembourg: Lorr.: RR.

France: Mar.: RRR, Boul.: RRR, Lorr.: RRR.

Lit.: Boul.: 72, Breuss (1990: 114-125).