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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: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 18. Lichenothelia. Lichenotheliaceae Henssen (1986); Dothideales.

Taxonomic Literature: Hawksworth D.L., Bull. Brit. Mus. (Nat. Hist.), Bot. 9 (1): 1-98 (1881); 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 [359-360] (1992); Henssen A., Biblioth. Lichenol. 25: 257-293 (1987).

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

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

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

Thallus: Crustose, not subdivided parts, squamulose, placodioid, granular, or areolate (primarily areolate). Thallus Outline: Soon disappearing or persistent. Upper Surface: Black or brown; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate; not sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia or with thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent or present:; 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: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid or perithecioid, orbicular, forming all across the thallus surface, becoming adnate to stipitate, stromatic. Margin: Indistinct to prominent. Exciple: Black, brown, or red. Periphyses: Absent. Hymenium: Iodine reaction: Lugol’s negative or Lugol’s positive, not hemiamyloid. Interascal Hyphae: Absent or present, scarcely branched to distinctly branched, not or scarcely anastomosed to distinctly anastomosed. Hypothecium: Black or brown.

Asci: Tholus thickened, not amyloid; dehiscence bitunicate; exoascus not amyloid or euamyloid, not hemiamyloid.

Ascospores: 1–2 to c. 8 per ascus, ellipsoid, 11-28.5 µm long, 5.5-16 µm wide, obtuse; septa present; both transversally and longitudinally, 1-3-transversally septate; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, pale brown or dark brown, in Lugol's Solution negative, wall not ornamented or ornamented.

Conidiomata: Absent resp. not observed or present; pycnidial or hyphomycetous; immersed or stipitate.

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