Lichenologist 19, 4: 424 (1987).

Synonyms: Index Fungorum

Protolog: Thallus saxicola, adnatus, flavus, lobis 0.5-1.2 mm latis, superne emaculatus, subtus brunneus, rhizinis simplicibus sparsis. Isidia laminalia, obconica, versus apices in granula corticata agglomerata erumpentia. Apothecia et pycnidia ignota. Acidum sticticum collectivum et acidum usnicum continens.

Protolog type data: Typus: Tanzania, Northern Province, Arusha District, Mt Meru, forest on east side, 1900 m alt., 3°15'S, 36°50'E, February 1974, H. Krog & T. D. V. Swinscow T10/119 (O-holotypus, BM-isotypus).

Type locality: Tanzania, Northern Province, Arusha District, Mt Meru, forest on east side, 1900 m, 2.1974, H. Krog & T. D. V. Swinscow T10/119 (O - holotype; BM - isotype).

Type locality coordinates: 3°15'S, 36°50'E.

Molecular barcode: Data lacking.

Thallus: foliose, tightly adnate to adnate, 2-7 cm broad, light yellowish green; lobes sublinear, 0.4-1 mm wide, dichotomously branched, separate to subimbricate; upper surface continuous, emaculate, shiny, transversely cracked with age, moderately to densely isidiate, the isidia subglobose, 0.08-0.1 mm in diameter, up to 2 mm high, becoming densely aggregated, the tips epicorticate, pale, erumpent and subsorediate with age, becoming richly branched; medulla white; lower surface plane, pale brown to brown, moderately rhizinate, the rhizines brown, simple, rather coarse, unbranched, 0.2- 0.5 mm long. Pycnidia unknown. Apothecia lacking.

Photobiont: Trebouxia.

Chemistry: The stictic acid aggregate, usnic acis (Krog & Swinscow 1987: 424). Stictic acid, constictic acid, usnic acid.

Ecology: On rock.

Molecular data: Genbank

Distribution: Kenya, Tanzania. Database

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