Protologue type data: Australia. South Australia. On Casuarina, 10 km north-east of Eden Valley along the Keyneton road, 480 m, J. A. Elix 2267, 21.v.1976; CBG-holotype.

Type locality: Australia, South Australia, on Casuarina, 10 km north-east of Eden Valley along the Keyneton road, 480 m, 21 May 1976, J. A. Elix 2267 (CBG - holotype).

Description: Lichen. Thallus foliose, corticolous, adnate, dark green to yellow-green, to 10 cm in diameter. Lobes irregular, rotund, 2.0-5.0 mm wide, often crowded and imbricate, plane, the margins crenulate. Upper surface broadly undulating, rugose centrally, dull for the most part, emaculate, apices shiny, black margined, lacking isidia and soredia; medulla white. Lower surface black with a narrow, naked, brown rim, sparsely rhizinate, rhizines short, simple or tufted at the apices, concolorous with the lower surface. Apothecia adnate, to 8 mm in diameter, disc concave at first then undulate-distorted, cinnamon brown to dark brown; margin involute at first, thick, persistent, amphithecium smooth at first but becoming rugulose; asci 8-spored, spores simple, colourless, ellipsoid, 11-14 x 6-8 µm. Pycnidia common, subspherical, immersed, black; conidia weakly bifusiform, 7-9 x 1 µm.

Photobiont: Probably Trebouxia.

Chemistry: Cortex K-; medulla K-, C-, P+ orange; containing usnic acid, protocetraric acid (minor), diffractaic acid (major), barbatic acid (trace) and 4-0-demethylbarbatic acid (trace), baeomycesic acid (trace), obtusatic acid (trace), virensic acid (+ trace), unknown (trace), caperatic acid (+).

Ecology: On bark.

Distribution type: Australia.

Taxonomy: Data lacking.

Note:

Distribution Database: Distributions

Distribution Database: Discover Life

Picture Database: Tropical Lichens

Molecular Database: Genbank

Synonym Database: Index Fungorum

Synonym Database: Mycobank