Mycotaxon 30: 330 (1987).

Synonyms: Index Fungorum

Type: Paraguay, Depto. Cordillera, Arros Tobaty, Schinini 16262, April 1978 (US - holotype; CTES - isotype).

Thallus: foliose, tightly adnate to adnate on rock, rather fragile, 2-7 cm broad, light yellowish green; lobes subirregular to sublinear, 0,8-1,5 mm wide, dichotomously branched, sparsely lobulate-laciniate at the tips of older lobes, contiguous to imbricate; upper surface continuous, emaculate, shiny, moderately isidiate, the isidia globose to subcylindrical, 0,08-0,15 mm in diameter, 0,1-0,5 mm high, basally constricted, the tips epicorticate, pale or blackening, easily abrading, erumpent apically but not sorediate, mostly unbranched; medulla white; lower surface plane, pale brown, moderately rhizinate, the rhizines pale brown, simple, 0,2-0,4 mm long. Pycnidia and apothecia lacking.

Photobiont: Trebouxia.

Chemistry: Stictic, constictic, norstictic, and usnic acids.

Ecology: On rock.

Molecular data: Genbank

Distribution: Colombia, Venezuela, Brazil, Paraguay. Database

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