Flora 53: 472 (1870).

Basionym: Lecidea absistens Nyl., Flora 52: 295 (1869).

Protolog: Data lacking.

Protolog type data: Data lacking.

Type locality: France, Dep. Finistère, Brest, ca. 10 m, 1868, Crouan (H-NYL 17737b - lectotype). Designated by Ekman (1996: 61).

Type locality coordinates: Data lacking.

Molecular barcode: Data lacking.

Thallus: indeterminate, thin to rather thick, usually discontinuous, of discrete or contiguous, convex, often shlightly effigurate areoles that are sometimes warted or subsquamulose, sometimes continuous, + cracked, warted, pale grey, yellow-grey, + green-grey, or grey-green ....

Photobiont: Data lacking.

Chemistry: 4-O-methylcryptochlorophaeic acid, atranorin as a minor constituent (Tønsberg et al. 1995).