Phytologia 28: 488 (1974).

Basionym: Parmelia microspora Müll. Arg., Revue Mycol., Toulouse 1, 4: 170 (1879).

Type: Colombia, near Bogotá, Gauduas, André 576 (G - lectotype; BM - isolectotype).

Thallus: foliose, firm, 3-10 cm broad, yellowish green; lobes subirregular, 2-4 mm wide, contiguous to imbricate; upper surface continuous to faintly white- maculate, moderately to densely sorediate, the soralia orbicular, becoming diffuse with age; medulla white; lower surface plane, black with a brown zone around the tips, moderately to densely rhizinate, the rhizines black, fine, unbranched, 0,2-0,8 mm long. Apothecia rare, substipitate, 2-8 mm in diameter; spores 5 x 9-10 µm. Pycnidia rare; conidia bifusiform, 0,5 x 5-6 µm.

Photobiont: Trebouxia.

Chemistry: Salazinic acid, gyrophoric acid (+), usnic acid.

Ecology: On rock.

Molecular data: Genbank

Distribution Type: Venezuela, Colombia, Ecuador, Peru, Bolivia, Argentina, Chile.

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