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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: 3. Dermatiscum. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Taxonomic Literature: Brusse F.A., Mycotaxon 25: 161-164 (1986); Hafellner J., Mayrhofer
H., Poelt J., Herzogia 5: 39-79 (1979); Rambold G., Mayrhofer H.
& Matzer M., Pl. Syst. Evol. 192: 31-40 (1994).

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

Thallus: Foliose, not subdivided parts, peltate. Upper Surface: Grey or yellow; special structures absent. Lower Surface: Attached by holdfasts; 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, not emerging, becoming adnate to soon sessile. Margin: Indistinct to 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 or brownish yellow.

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

Ascospores: c. 8 per ascus, ellipsoid, 8.5-13 µm long, 5.5-7.5 µm wide, obtuse; septa present; transversally septate, 1-transversally septate; wall thin, not thickened at the septum or thickened at the septum, dark brown, in Lugol's Solution negative, wall not ornamented or ornamented.

Secondary Metabolites: Present, of the following substance class(es): ß-orcinol depsides and pulvinic acid derivatives.

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