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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); revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 1. Halographis. Genus of unknown placement (incertae sedis); Dothideales.

Taxonomic Literature: Kohlmeyer J. & Volkmann-Kohlmeyer B., Can. J. Bot. 66: 1138-1141 (1988); Renobales G. & Aguirre B., Syst. Ascomycetum: 87-92 (1990).

Ecology: Biotroph; algicolous (on Chroococcales) or lichenized; substrate calciferous.

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

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: Apothecioid, linear or irregular, not emerging. Margin: External filaments absent. Exciple: Black, brown, or brownish yellow. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, scarcely branched to distinctly branched, not or scarcely anastomosed to distinctly anastomosed. Hypothecium: White or brownish yellow.

Asci: Tholus thickened, not amyloid; dehiscence bitunicate; exoascus not amyloid, not hemiamyloid.

Ascospores: c. 8 per ascus, ellipsoid or fusiform, 17-29 µm long, 6-9 µm wide, obtuse; septa present; transversally septate, 1-transversally septate; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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