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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. Gyalecta. Gyalectaceae (A. Massal.) Sitzenb. (1862); Gyalectales.

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero
Special 7: 1-893 [374-376] (1985); James P.W. & Woods R.G. in:
Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and
Ireland, London (1992); Lettau G., Beih. Repert. Spec. Nov. Regni
Veg. 69: 1-250 (1932-7); Vezda A., Sborn. Vys. Zemsd. Lsen. Brno, C
1958(1): 21-56 (1958).

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

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

Lichen Photobionts: Primary photobiont present; trentepohlioid. Primary photobiont taxonomy: Trentepohlia (A. Beck 22-05-97); Trentepohliaceae; Trentepohliales, Ulvophyceae, Eukariota. Secondary photobiont absent.

Thallus: Crustose, not subdivided parts, rimose. Upper Surface: Grey, white, or pink (rosé); 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: Apothecioid, orbicular, forming all across the thallus surface, not emerging, becoming adnate to soon sessile. Margin: Prominent; external filaments absent. Periphyses: Absent. Interascal Hyphae: Present.

Ascospores: c. 8 per ascus, broadly ellipsoid, ellipsoid, or fusiform, 9-31 µm long, 4-11 µm wide, obtuse; septa present; transversally septate or both transversally and longitudinally, 2-13-transversally septate; wall thin, not thickened at the septum, hyaline, 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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