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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Moberg R. (95-11-28); 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). Phaeophyscia. Synonyms: Physciella §§§ Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Taxonomic Literature: Coppins B.J. in: Purvis O.W. et al. (eds), The Lichen Flora of Great
Britain and Ireland, London (1992); Esslinger T.L., Mycotaxon 7: 283-
320 (1978); Esslinger T.L., Mycologia 78: 92-97 (1986) - sub
Physciella; Galloway D.J., Flora of New Zealand Lichens: i-lxxiii, 1-
662 [383-385], Wellington (1985); Maas Geesteranus R.A., Blumea 7:
206-287 (1952); Mayrhofer H. & Poelt J., Nova Hedwigia 30: 781-
798 (1978); Moberg R., Symb. Bot. Upsal. 22: 1-108 (1977); Moberg R.,
Bot. Notiser 131: 259-262 (1978); Moberg R., Nord. J. Bot. 31: 509-
516 (1983); Rambold G., Mayrhofer H. & Matzer M., Pl. Syst. Evol.
192: 31-40 (1994).

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

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

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

Thallus: Foliose, not subdivided parts, lobed. Thallus Outline: Soon disappearing. Upper Surface: Grey, brown, or olive; special structures absent or present:; not pseudocyphellate; eciliate; without hairs or hairy; not isidate or isidiate; not sorediate or sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by holdfasts; special structures present:; not pseudocyphellate; not cyphellate; 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, forming all across the thallus surface, soon sessile. Margin: Prominent; external filaments absent. Exciple: White or brownish yellow. 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, broadly ellipsoid or ellipsoid, 17-26 µm long, 7-11 µm wide, obtuse; septa present; transversally septate, 1-transversally septate; wall thin, thickened at the septum, dark brown, in Lugol's Solution negative, wall not ornamented or ornamented.

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

Secondary Metabolites: Not detected or present, of the following substance class(es): (tri-)terpenoids (+ skyrin).

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