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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Australiaena. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Taxonomic Literature: Matzer M, Mayrhofer H. & Elix J.A., Lichenologist 29: 35-44 (1997).

Lichen Photobionts: Primary photobiont present; chlorococcal. Secondary photobiont absent.

Thallus: Crustose, rimose or areolate (primarily areolate). Thallus Outline: Soon disappearing or persistent. Upper Surface: Brown, green, grey, brownish yellow, or yellow; special structures absent. Lower Surface: Attached by the whole lower surface; special structures absent or present:; not pseudocyphellate; not cyphellate; not rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, not emerging, becoming adnate to soon sessile. Margin: Indistinct to prominent; external filaments absent. Epithecium: Apical cells brown or brownish yellow. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Brown, white, or brownish yellow.

Asci: Tholus thickened, amyloid, with non-amyloid wide axial body and divergent amyloid flanks towards apex; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, ellipsoid, 7-19 µm long, 4-8 µm wide, obtuse; septa present; transversally septate, 1-transversally septate, formed by the proper spore wall; wall thin, thickened at the septum, pale brown or dark brown, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present; pycnidial; immersed or sessile, formed all accross the thallus surface.

Secondary Metabolites: Present, of the following substance class(es): orcinol depsides, orcinol depsidones, and xanthones.

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