Lichenologist 15, 2: 113 (1983).
Basionym: Lichen cochleatus Dicks., Fasc. Pl. Crypt. Brit. (London) 1: 13 (1785).
Type locality: United Kingdom, Great Britain, England, sine loco, 1784, Dickson (LINN-SM - lectotype). Lectotypification by Jørgensen & James 1983: 113).
Type locality coordinates: Data lacking.
Molecular barcode: Data lacking.
Thallus: foliose, orbicular, to 4 cm diam., pale to dard leaden-grey, sometimes suffused brownish at apices, Data lacking. (Galloway & Jørgensen 1995: 233).
Photobiont: Data lacking.
Chemistry: No lichen substances.
Ecology: Data lacking.
Distribution Type: Data lacking.
Note: