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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. 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: 30 (A. Aptroot 99-09-27). Gyalidea. Solorinellaceae Vezda & Poelt (1989); Ostropales.

Taxonomic Literature: Boom P.P.G. van den & Vezda A., Mycotaxon 54: 421-426 (1995); Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [376-377] (1985); Etayo J. & Vezda A., Lichenologist 26: 333-335 (1994); Foucard T. & Thor G., Lichenologist 28: 101-104 (1996); Galloway D.J., Flora of New Zealand Lichens: i-lxxiii, 1-662 [176-177], Wellington (1985); James P.W. & Woods R.G. in: Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and Ireland, London (1992); Poelt J. & Vezda A., Biblioth. Lichenol. 9: 1-258 [115-118] (1977); Vezda A., Folia Geobot. Phytotax. Bohemoslov. 1: 311-340 (1966); Vezda A. & Poelt J., Nova Hedwigia 53: 99-113 (1991); Vezda A., H.T. Lumbsch & Øvstedal D.O., Nova Hedwigia 50: 523-528 (1990).

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

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

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

Thallus: Indistinct or crustose, not subdivided parts, granular or rimose. Upper Surface: Black, brown, green, grey, olive, red, or white; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate; not sorediate; not cephalodiate; not lobulate; without granules or with granules granules, without thalloconidia thalloconidia. 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: Apothecioid, orbicular, soon sessile. Margin: Prominent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells hyaline, brownish yellow, or olive. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

Ascospores: 1–2 to c. 8 or more than 32 per ascus, ellipsoid, broadly ellipsoid, oblong, fusiform, or globose, 8-45 µm long, 3-25 µm wide, obtuse; septa present; transversally septate or both transversally and longitudinally, 3-99-transversally septate; wall thin or thick, distinctly differentiated into primary and secondary wall, 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.

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