Syn.: Catillaria sphaeroides (A. Massal.) Schuler, Bilimbia sphaeroides (Dicks.) Th. Fr., Biatora pilularis (Körb.) Hepp, B. sphaeroides (Dicks.) Körb., Lecidella pilularis (Körb.) Stein

On bark of old trees (Fraxinus and Quercus mainly), once on mosses over a sandstone rock by a stream, always in well-preserved, humid forests.

Belgium: Mosan: RRR, Ard.: R (locally AR in the south), Lorr.: RRR.

Luxembourg: Lorr.: R.

France: Ard.: RRR.

Lit.: Di: 59-60, L2: 93, Ertz & Duvivier (2006: 51).