Mém. Soc. Nat. Sci. Nat. Cherbourg 37: 136 (1909).

Basionym: Lecidea ammiospila Wahlenb. in Ach., Meth. Lich. Suppl.: 13 (1803).

Type locality: Norway, Svalbard (Spitzbergen), Sabine Land: Tempelfjorden at Schoultzhamna. UTM WH 4502. Alt.: 5-20 m. Lignum on beach. 12.8.1986. US 5631; Sassendalen, Gjelhallet. UTM: WG 4694. Alt.: 20m. Lignum on horizontal gravel. 16.8.1986. US 5802.

Thallus: crustose, continuous, without elongated lobes; prothallus absent; surface gray, smooth, without asexual propagules. Apothecia: adnate, 0.3-0.8 mm in diam., lecanorine; disc dark reddish orange, slightly convex, epruinose; margin persistent, slightly raised; thalline margin present or absent, concolorous with thallus; proper margin visible, concolorous with disc; parathecium irregular hyphae or elongate to oval cells; exciple below hypothecium amorphous; epihymenium golden, K+ red, C+ red or C+ violet; hymenium hyaline, (70-)75-90 µm tall; paraphyses 1-2 tip cells slightly swollen, with some branching or frequently branched; subhymenium hyaline. Ascospores: Asci cylindrical, 8-spored. Ascospores hyaline, 2 locules, ellipsoid, 11-17 x 5.5-8.5 µm, isthmus 3-5.5 µm, spore end wall thin. Pycnidia mostly immersed, ostiole orange (Wetmore 2007: 184).

Photobiont: Data lacking.

Chemistry: Apothecial margin K-; thallus K-; parietin, emodin (Wetmore 2007: 184).

Ecology: On bryophytes or detritus.

Molecular data: Genbank

Distribution: Europe and North America. Database