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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Lumbsch H. T. (94-12-28, 99-09-06) and Scholz P. (02-05-16, 06-06-12); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 350. Pertusaria. Pertusariaceae Körb. (1855); Pertusariineae; Lecanorales.

Taxonomic Literature: Archer A.W., Mycotaxon 41: 223-269 (1991); Archer A.W., Biblioth. Lichenol. 53: 1-17 (1993); Archer A.W., Biblioth. Lichenol. 69: 1-249 (1997); Archer A.W. & Elix J.A., Telopea 6: 9-30 (1994); Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [573-588] (1985); Dibben M.J., Publ. Biol. Geol. Milwaukee Publ. Mus. 5: 1-162 (1980); Elix J.A., Malcolm W.M. & Archer A.W., Mycotaxon 53: 273-281 (1995); Galloway D.J., Flora of New Zealand Lichens: i-lxxiii, 1-662 [368-381], Wellington (1985); Hanko B., Biblioth. Lichenol. 19: 1-297 (1983); Kantvilas G., Lichenologist 22: 289-300 (1990); Kondratyuk S.Y.A. & Zelenko S.D., Ukrayins'k. Bot. Zhurn. 59(5): 598-607 (2002); Lumbsch H.T. & Nash T.H. III in: Nash T.H. III et al. (eds) Lichen Flora of the Greater Sonoran Desert Region vol. 1, 341-357, Tempe (2002); Lumbsch H.T., Feige G.B. & Schmitz K.E., J. Hattori Bot. Lab. 75: 295-304 (1994); Purvis O.W. & James P.W. in: Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and Ireland, London (1992).

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

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

Lichen Photobionts: Primary photobiont present; chlorococcal. Primary photobiont taxonomy: Trebouxia (A. Beck 22-05-97); Trebouxiaceae; Trebouxiales, Trebouxiophyceae, Eukariota. Secondary photobiont absent.

Thallus: Indistinct or crustose, not subdivided parts, rimose. Thallus Outline: Soon disappearing or persistent. Upper Surface: White, grey, olive, yellow, or brownish yellow; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate or isidiate; 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; not pseudocyphellate; not cyphellate; not rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

Medulla: Iodine reaction in Lugol's solution negative; not different with or without KOH pre-treatment (euamyloid).

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular or irregular, forming all across the thallus surface, not emerging, becoming adnate to soon sessile. Margin: Indistinct to prominent; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells hyaline. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: White.

Asci: Tholus thickened, amyloid, with amyloid cap; dehiscence lecanoralean; exoascus euamyloid, hemiamyloid.

Ascospores: 1–2 to c. 8 per ascus, ellipsoid, (20)-60-250-(300) µm long, (11)-20-80-(115) µm wide, obtuse; septa absent; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, hyaline, middle brown, or dark brown, in Lugol's Solution negative, wall not ornamented.

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

Conidia: Bacilliform or filiform; microconidial, not branched; aseptate; cell wall hyaline.

Secondary Metabolites: Present, of the following substance class(es): (higher) aliphatic acids, benzyl esters, orcinol depsides, orcinol depsidones, ß-orcinol depsides, ß-orcinol depsidones, and xanthones.

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