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Data Set Maintenance: Data set standard item. Data set author(s): Scholz P. @EXCL@ Cáceres M. (06-08-08). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 5. Synonyms: Lecanora p.pt.; Lecanoraceae Körb. (1855); Lecanorineae; Lecanorales.

Taxonomic Literature: Choisy M., Bull. Soc. bot. Fr. 76: 521-527 [524] (1929); Hafellner J. & Türk R., Stapfia 76: 1-167 [114, 157] (2001); Santesson R. et al., Lichen-forming and lichenicolous fungi of Fennoscandia, Uppsala 268-269 (2004).

Biogeography: Checklist records: Austria, Germany, Great Britain, Italy, Sweden and Norway, and United States and Canada (continental).

Lichen Photobionts: Primary photobiont present; chlorococcal. Primary photobiont taxonomy: Trebouxia; Trebouxiaceae; Trebouxiales, Trebouxiophyceae, Eukariota. Secondary photobiont absent.

Thallus: Crustose (effigurate), not subdivided parts, placodioid. Thallus Outline: Persistent. Upper Surface: Grey, green, or olive; special structures absent; not pseudocyphellate; eciliate; without hairs; not isidate; not sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent; not pseudocyphellate; not cyphellate; not rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

Medulla: Iodine reaction in Lugol's solution negative; not different with or without KOH pre-treatment (euamyloid).

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, forming all across the thallus surface, soon sessile. Wall: Not carbonized, not fused. Margin: Distinct to prominent; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells brownish yellow. Hymenium: Iodine reaction: Lugol’s positive, not hemiamyloid. 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; exoascus euamyloid, not hemiamyloid.

Ascospores: c. 8 per ascus, ellipsoid or broadly ellipsoid, 9-15-(16) µm long, 4-7 µm wide, obtuse; 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.

Conidiogeneous Cells: Apical. Conidia: Filiform or curved; microconidial, not branched; aseptate; cell wall hyaline.

Secondary Metabolites: Present, of the following substance class(es): dibenzofurans [and usnic acids], ß-orcinol depsides, and (tri-)terpenoids.

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