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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: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 1. Clauzadeana. Lecanoraceae Körb. (1855); Lecanorineae; Lecanorales.

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [337] (1985); Hawksworth D.L. in: Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and Ireland, London (1992); Rambold G., Biblioth. Lichenol. 34: 1-346 (1989); Roux C., Bull. Soc. Linn. Provençe 35: 99-102 (1984).

Biogeography: Checklist records: Austria, Germany, Great Britain, Italy, Sonoran Desert, Sweden and Norway, and New Zealand.

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

Thallus: Crustose, areolate (primarily areolate). Thallus Outline: Soon disappearing or persistent. Upper Surface: Brown; 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. Margin: Indistinct; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells brown to green to brownish yellow. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: White to 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, 7-14 µm long, 3-6 µm wide, obtuse; septa absent; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Secondary Metabolites: Present, of the following substance class(es): ß-orcinol depsidones.

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