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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: 1. Gyrocollema. Synonyms: Ginzbergerella Zahlbr. (§§§§); Lichinaceae Nyl. (1854); Lichinales.

Taxonomic Literature: Henssen A. in Eriksson O. & Hawksworth D.L., Syst. Ascomycetum 5: 1-174 [131] (1986); Vainio E., Mycologia 21: 33-40 (1929).

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

Thallus: Indistinct or crustose, not subdivided parts. Upper Surface: Grey 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: Apothecioid, orbicular, forming all across the thallus surface, soon sessile. Margin: Prominent; external filaments absent. Exciple: Brown or brownish yellow. Periphyses: Absent. Epithecium: Apical cells black or brown. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: Black, brown, white, or brownish yellow.

Ascospores: c. 8 per ascus, ellipsoid, oblong, cylindrical, or oblong-obtuse, 8-12 µm long, 3-7 µm wide, obtuse; septa absent; wall not thickened at the septum, hyaline, in Lugol's Solution negative.

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