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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Aptroot A. (95-02-10); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 20 (estimation provided by A. Aptroot 99-09-27). Anthracothecium. Pyrenulaceae Rabenh. (1870); Pyrenulales.

Taxonomic Literature: Aptroot A., Biblioth. Lichenol. 44: 1-178 (1991); Galloway D.J.,
Flora of New Zealand Lichens: i-lxxiii, 1-662 [6], Wellington (1985);
Harris R.C., Mem. N. Y. Bot. Gard. 49: 74-107 (1989).

Biogeography: Checklist records: Guianas, New Guinea, New Zealand, Sonoran Desert, Thailand, United States and Canada (continental), and Republic of South Africa.

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

Thallus: Indistinct or crustose, not subdivided parts. Upper Surface: Green, brown, olive, or brownish yellow; 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: Perithecioid, orbicular or irregular, forming all across the thallus surface, not emerging, becoming adnate to soon sessile, stromatic. Wall: With a carbonized black clypeus around the ostiole, not fused. Margin: Indistinct; external filaments absent. Exciple: Black or brown. Periphyses: Absent. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed.

Asci: Tholus thickened, not amyloid; ocular chamber indistinct; dehiscence bitunicate.

Ascospores: 1–2 to c. 8 per ascus, globose, broadly ellipsoid, ellipsoid, cylindrical, oblong-obtuse, or oblong, 35-250 µm long, 8-70 µm wide, obtuse; septa present; both transversally and longitudinally, formed by the endospore wall layer; wall thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, dark brown, in Lugol's Solution negative, wall not ornamented.

Secondary Metabolites: Not detected or present, of the following substance class(es): (anthra-)quinones.

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