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Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Triebel D. (98-01-01); revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 1. Epilichen. Rhizocarpaceae Hafellner (1984); Cladoniineae; Lecanorales.

Taxonomic Literature: Hafellner J., Nova Hedwigia 30: 673-692 (1978); Hafellner J., Nova Hedwigia 30: 673-695 (1979); Hafellner J., Beih. Nova Hedwigia 62: 1-248 [73-81] (1979); Hawksworth D.L. Lichenologist 11: 205-206 (1979); Hawksworth D.L. in: Purvis O.W., Coppins B.J., Hawksworth D.L., James P.W. & Moore D.M. (eds), The lichen flora of Great Britain and Ireland: 1-710 [245-246] (1992); Ihlen P.G., Lichenologist 30: 27-57 [45-48] (1998); Poelt J. & Vezda A., Biblioth. Lichenol. 16: 1-390 [149] (1981); Rambold G. & Triebel D., Biblioth. Lichenol. 48: 1-201 [135-137] (1992); Triebel D., Rambold G. & Nash III T.H., Mycotaxon 42: 263-296 [275-276] (1991).

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

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

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

Thallus: Indistinct or crustose, not subdivided parts, squamulose. Upper Surface: Green, grey, brownish yellow, olive, or yellow; special structures absent. Lower Surface: Attached by the whole lower surface; special structures absent.

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

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid or perithecioid, orbicular or irregular, forming all across the thallus surface, not emerging, becoming adnate to soon sessile. Margin: Indistinct to prominent; external filaments absent. Exciple: Black or brown. Periphyses: Absent. Epithecium: Apical cells black, brown, brownish yellow, olive, or red. Hymenium: Iodine reaction: Lugol’s positive, not hemiamyloid. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: Black, brown, or brownish yellow.

Asci: Tholus thickened, amyloid, with amyloid cap; dehiscence lecanoralean; exoascus euamyloid, not hemiamyloid.

Ascospores: c. 8 per ascus, ellipsoid or broadly ellipsoid, 7-18 µm long, 4-10 µm wide, obtuse or aciculate; septa present; transversally septate, 1-transversally septate; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, laterally constricted where the septum meets the spore wall, dark brown, in Lugol's Solution negative, wall not ornamented.

Secondary Metabolites: Not detected or present, of the following substance class(es): pulvinic acid derivatives.

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