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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: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 2. Mobergia. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Type Information: Type: Mobergia calculiformis (W.A. Weber) H. Mayrhofer & Sheard.

Taxonomic Literature: Mayrhofer H., Sheard J.W. & Matzer M., Bryologist 95: 436-442 (1992); Rambold G., Mayrhofer H. & Matzer M., Pl. Syst. Evol. 192: 31-40 (1994).

Biogeography: Checklist records: Sonoran Desert and United States and Canada (continental).

Ecology: Biotroph; lichenized; terricolous; substrate non-calciferous or calciferous.

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

Thallus: Crustose, areolate (primarily areolate) or subfruticose. Thallus Outline: Soon disappearing. Upper Surface: Grey or brownish yellow; special structures absent. Lower Surface: Attached by the whole lower surface or attached by holdfasts; special structures absent or present:; not pseudocyphellate; not cyphellate; not rhizinate or 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, not emerging, becoming adnate to soon sessile. Margin: Indistinct to prominent; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells brown or brownish yellow. 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, 12-21.5 µm long, 7-10 µm wide, obtuse; septa present; transversally septate, 1-transversally septate; wall thickened at the septum, dark brown, in Lugol's Solution negative, wall 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): ß-orcinol depsides and ß-orcinol depsidones.

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