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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Grube M. (95-12-05); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 1. Gymnographoidea. Opegraphaceae Stizenb. (1862); Arthoniales.

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

Thallus: Crustose, not subdivided parts. Upper Surface: Green, grey, or olive; special structures absent. Lower Surface: Attached by the whole lower surface; special structures absent.

Medulla: Iodine reaction reacting violet-red without and distinctly blue with KOH pre-treatment (hemiamyloid).

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. Margin: Indistinct. Hymenium: Iodine reaction: hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

Ascospores: c. 8 per ascus, oblong, 20-23 µm long, 7.5-8.5 µm wide, obtuse; septa present; transversally septate, 3-transversally septate, formed by the proper spore wall; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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