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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Zedda L. (01-07-02); not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 20 (A. Aptroot 99-09-27). Protoparmelia. Lecanoraceae Körb. (1855); Lecanorineae; Lecanorales.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M.,

Biblioth. Lichenol. 64: 1-220 [145-148] (1997); Coppins B.J. in:

Purvis O.W., Coppins B.J., Hawksworth D.L., James P.W. & Moore

D.M. (eds), The lichen flora of Great Britain and Ireland: 1-710
[501-
503] (1992); Poelt J. & Leuckert C., Nova Hedwigia 52: 39-
64
(1991); Rambold G., Biblioth. Lichenol. 34: 1-346 (1989); Poelt
J. & Grube M., Nova Hedwigia 55(3-4): 381-395 (1992); Rambold G.

& Triebel D., Biblioth. Lichenol. 48: 1-201 [117-118] (1992).

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

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

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 or brownish yellow; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate or isidiate; not sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia or with thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent or present:; not pseudocyphellate; not cyphellate; not rhizinate; without thalloconidia or with 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, forming all across the thallus surface, not emerging, becoming adnate to substipitate. Margin: Distinct to prominent; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells brown. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

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

Ascospores: c. 8 per ascus, ellipsoid, fusiform, or oblong-obtuse, 7-13 µm long, 2-7 µm wide, obtuse or aciculate; 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): orcinol depsides, orcinol depsidones, and ß-orcinol depsidones (+ zeorin).

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