Lich. Mexique, Suppl. 1: 15 (1922).

Synonyms: Index Fungorum

Protolog: Data lacking.

Type locality: Data lacking.

Type locality coordinates: Data lacking.

Molecular barcode: Data lacking.

Thallus: squamulose; squamules dispersed or contiguous and imbricate, up to 4 mm wide, with a black to dark brown stipe, rounded, convex, epruinose. Upper surface dull yellow, smooth to rough; lower surface distinctly carbonized and corticate. Upper cortex prosoplectenchymatous, 60-130 µm thick formed by hyphal bands interrupting the algal layer, cells various from angular to round. Apothecia 1-16 per squamule; disc immersed, yellowish to reddish-brown, punctiform, slit-like or round, epruinose, 0.1-0.4 wide. Hymenium 130-170 µm tall. Epihymenium greenish-yellow. Paraphyses 2.0-2.5 µm diam. at mid-level, apices unexpanded. Parathecium 10-50 µm thick narrowing to 50 µm beneath the subhymenium. Asci 110-130 x 20-24 µm, narrowly clavate. Ascospores 100-200 spores per ascus, broadly ellipsoid, 4-6 x 2-3 µm. Pycnidia unknown (Knudsen et al. 2008: 4).

Photobiont: Trebouxioid green alga.

Chemistry: Spot tests negative, rhizocarpic acid (Knudsen 2007: 8).

Ecology: On exposed volcanic and acid rocks.

Molecular data: Genbank

Distribution: Arizona, Mexico, Argentina, and Venezuela. Database

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