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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. Number of known taxa within this rank: 7. Pyrrhospora. Lecanoraceae Körb. (1855); Lecanorineae; Lecanorales.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M., Biblioth. Lichenol. 64: 1-220 [169-170] (1997); Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [654] (1985); Hafellner J., Herzogia 9: 725-747 (1993); Hawksworth D.L. in: Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and Ireland, London (1992); Poelt J. & Vezda A., Biblioth. Lichenol. 16: 1-390 [263-264] (1981); Rambold G., Biblioth. Lichenol. 34: 1-346 (1989).

Biogeography: Checklist records: Austria, Germany, Great Britain, Sonoran Desert, Italy, Sweden and Norway, New Zealand, United States and Canada (continental), Guianas, Thailand, and New Guinea.

Ecology: Biotroph; lichenized; lignicolous or corticolous; substrate non-calciferous.

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

Thallus: Indistinct or crustose, not subdivided parts, granular, rimose, or areolate (primarily areolate). Upper Surface: Grey or brownish yellow; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate; not sorediate or sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, forming all across the thallus surface, soon sessile. Margin: Indistinct to prominent; external filaments absent. Exciple: White or brownish yellow. Periphyses: Absent. Epithecium: Apical cells orange or red. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: 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 or broadly ellipsoid, 7-14 µm long, 5-8 µm wide, obtuse; septa absent; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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

Secondary Metabolites: Present, of the following substance class(es): ß-orcinol depsides, ß-orcinol depsidones, (anthra-)quinones, xanthones, and dibenzofurans [and usnic acids].

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