Opuscula Philolichenum 11: 19 - 25 (2012).

Basionym: Acarospora immersa Fink in Hedrick, Mycologia 26: 158 (1934).

Protolog: Data lacking.

Protolog type data: Data lacking.

Type locality: USA, Ohio, Oxford, on limestone in grassy, open pasture, 15 May 1927, B. Fink s.n. (MSU - holotype).

Type locality coordinates: Data lacking.

Molecular barcode: Data lacking.

Thallus: thin, smooth to minutely chinky and areolate, dark greenish gray to black. Apothecia minute, 0.1 - 0.15 mm in diameter, immersed one or rarely more in an areole, the disk flat, grayish pruinose, the exciple thin, colored like the thallus, entire; hypothecium and hymenium hyaline; paraphyses hyaline, coherent and semidistinct; asci clavate and becoming inflated; spores numerous, hyaline, ellipsoid, non-septate, 3 - 4 / 1.5 - 2 µm, irregularly arranged (Fink in Hedrick 1934: 158).

Photobiont: Green alga. Protococcus (Fink in Hedrick 1934: 158).

Chemistry: No lichen substances.

Ecology: On limestone.

Molecular data: Genbank

Distribution: Database

Note:

Taxonomy: Möglicherweise ein Synonym von C. heppii.