Nord. J. Bot. 3: 517 (1983).

Type: Zimbabwe, Bamps, Symoens, et Vanden Berghen 204 (LG - holotype).

Thallus: closely appressed and adnate. Lobes 2-3 mm broad, rounded, with a margin irregularely incised and crenate, more or less imbricate. Upper surface ash-grey, greenish gray or rarely yellowish green, rather dull, rugose to more or less reticulately wrinkled, with rounden pseudocyphellae; pseudocyphellae wihte, evenly scattered, 0,1-0,2(-0,3) mm large, sometimes almost raised. Flattened squamules (phyllidia?) usually numerous and covering most of the thallus, irregularly incised and becoming imbricate and more or less erect, sometimes with tiny pseudocyphellae on their upper surface, with a lower cortex fragile and soon eroding, exposing medullary tissue; the squamules then appearing whitish downy on their lower side but never evolving or disintegrating into soralia. Lower surface black and more or less shiny; rhizines rather numerous, simple and black. Medulla white. Pycnidia numerous, appearing like small black dots on the upper surface. Conidia numerous, unciform (in the sense of Krog 1982) or rarely bacilliform and straight, 5-7 x 1 µm. Apothecia not abundant, 0,4 - 1 cm in diameter, sessile; disc brown, first concave but becoming flat; outer exciple rugose and with numerous pseudocyphellae. Spores 8 per ascus, ellipsoid, 13 - 14 - 16 x 8 - 10 - 12 µm, including a more or less 1 µm thick episporium.

Chemistry: Atranorin, gyrophoric acid and an associated unknown by TLC (Sérusiaux 1983).

Ecology: On bark or on twigs.

Distribution: Argentina, Brazil: Matto Grosso, Brazil: Sao Joaquim, South Africa: Natal, Uruguay, Zimbabwe.