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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Matzer M. & Mayrhofer H. (95-01-15); revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 1. Dermiscellum. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Taxonomic Literature: Hafellner J., Mayrhofer H., Poelt J., Herzogia 5: 39-79 (1979); Rambold G., Mayrhofer H. & Matzer M., Pl. Syst. Evol. 192: 31-40 (1994).

Thallus: Crustose or foliose, squamulose, areolate (primarily areolate), or placodioid, peltate, lobed or umbilicate. Upper Surface: Black, brown, grey, or brownish 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 or irregular, forming all across the thallus surface, not emerging, becoming adnate to soon sessile. Margin: Indistinct to distinct; external filaments absent. Exciple: Black or brown. Periphyses: Absent. Epithecium: Apical cells black or green. Interascal Hyphae: Present, scarcely branched to distinctly branched, not or scarcely anastomosed to distinctly anastomosed. Hypothecium: Brown.

Ascospores: c. 8 per ascus, ellipsoid, 14-18 µm long, 6-9 µm wide, obtuse; septa present; transversally septate, 1-transversally septate; wall thin, pale 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.

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