in Nash & Elix, Mycotaxon 26: 455 (1986).

Basionym: Parmelia oleosa Elix & P.M. Armstr., Aust. J. Bot. 31, 5: 478 (1983).

Type: Australia, New South Wales, Tuross River, 13 km S of Countegany, J. Elix 6397 (MEL - holotype)

Thallus: tightly adnate, sometimes appearing areolate in the center, 3-8 cm broad, dull yellowish green or darkening; lobes subirregular to sublinear, 0,8-1,5 mm wide, contiguous to imbricate; upper surface continuous, emaculate, shiny, rugulose, isidia and soredia lacking; medulla white; lower surface plane, pale brown to brown, moderately rhizinate, the rhizines pale brown, simple, 0,2-0,4 mm long. Pycnidia common; conidia bifusiform, 0,5 x 5-6 µm. Apothecia common, adnate, 1-4 mm in diameter; spores 4-5 x 7-8 µm.

Chemistry: Constipatic acid, protoconstipatic acid, dehydroconstipatic acid, pertusaric acid (+ trace), usnic acid.

Ecology: On silicious rock.

Distribution: Argentina.

Photobiont: Trebouxia.