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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; 01-08-14); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 3. Gyrophthorus. Genus of unknown placement (incertae sedis); of unknown placement (incertae sedis).

Taxonomic Literature: Creveld M., Biblioth. Lichenol. 17: 1-288 [279-281] (1981); Hafellner
J. & Sancho L.G., Herzogia 8: 363-382 [370-372] (1990); Hoffmann N. & Hafellner J., Biblioth. Lichenol. 77: 1-190 [34-38) (2000).

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: Perithecioid, orbicular, not emerging. Wall: Not fused. Margin: External filaments absent. Exciple: Brown, white (subhyalin to pale brown), or brownish yellow. Periphyses: Absent. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, scarcely branched to distinctly branched (at the basal part), not or scarcely anastomosed. Hypothecium: Brown, sub-white, or brownish yellow.

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

Ascospores: c. 8 per ascus, ellipsoid, oblong-obtuse, ovoid, curved, or fusiform, 9.5-26.5 µm long, 2.5-6.5 µm wide, obtuse or aciculate; septa absent; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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