Lich. de l'Est de la Corse: 52, 1926. Basionym: Pachyospora bunodea A. Massal. - Symmicta Lich.: 26, 1855.
Synonyms: Lecanora bunodea (A. Massal.) Jatta
Distribution: N - Ven (Lazzarin 2000b).
Description: Thallus crustose, episubstratic, areolate-verrucose, brownish grey, often with a faintly bluish hue, dull. Areoles dispersed, usually regularly round, convex, up to 2.5 mm in diam. Apothecia lecanorine-aspicilioid, 0.3-0.7 mm across, immersed in the areoles and usually occupying most of their surface, round, with a black, but often white-pruinose, concave to flat disc, and a rather thick, raised, white thalline margin. Epithecium olive green to olive-brown, N+ green, K+ brown; hymenium colourless, 100-170 µm high, I+ blue or sometimes partly turning yellow-green; paraphyses submoniliform; hypothecium colourless. Asci (2-)4(-6)-spored, clavate, the thin outer coat K/I+ blue, the wall and apical dome K/I-. Ascospores 1-celled, hyaline, broadly ellipsoid to subglobose, poorly developed. Pycnidia black, immersed. Conidia bacilliform, straight, c. 7 x 0.5 µm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-. Chemistry: usually with aspicilin, rarely lacking secondary metabolites.
Note: a rather poorly known species of acid siliceous rocks, most probably related to Circinaria contorta (see Roux & coll. 2014).