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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Aptroot A. (95-02-10); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 3. Eopyrenula. Pleomassariaceae M.E. Barr (1979); Pleosporales.

Taxonomic Literature: Aptroot A., Biblioth. Lichenol. 44: 1-178 (1991); Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [362] (1985); Coppins B.J. in: Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and Ireland, London (1992); Harris R.C., Michigan Bot. 12: 3-68 (1973); Poelt J. & Vezda A., Biblioth. Lichenol. 16: 1-390 [147] (1981).

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

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

Thallus: Indistinct or crustose, not subdivided parts. Upper Surface: Brown, green, olive, or white; special structures absent. Lower Surface: Attached by the whole lower surface; special structures absent.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Perithecioid, orbicular, forming all across the thallus surface, becoming adnate to soon sessile. Margin: External filaments absent. Exciple: White or brownish yellow. Periphyses: Absent. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

Ascospores: c. 8 per ascus, ellipsoid, clavate, or fusiform, 12-33 µm long, 4-10 µm wide, obtuse or aciculate; septa present; transversally septate, 3-7-transversally septate; wall thin, not thickened at the septum, dark brown, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present; pycnidial; formed all accross the thallus surface.

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