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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: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 1. Pyrenothrix. Pyrenotrichaceae Zahlbr. (1926); Dothideales.

Taxonomic Literature: Riddle L., Bot. Gaz. (Chicago) 64: 513 (1917); Henssen A., Ber. Deutsch. Bot. Ges. 77: 317 (1964); Galloway D.J., Flora of New Zealand Lichens: i-lxxiii, 1-662 [487], Wellington (1985).

Biogeography: Checklist records: New Zealand and United States and Canada (continental).

Lichen Photobionts: Primary photobiont present; cyanobacterial. Primary photobiont taxonomy: Scytonema (A. Beck 22-05-97); Scytonemataceae; Nostocales, Cyanobacteria, Prokaryota. Secondary photobiont absent.

Thallus: Filamentose or granular. Upper Surface: Black, brown, or grey; 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, forming all across the thallus surface, soon sessile. Margin: External filaments absent. Periphyses: Absent.

Ascospores: c. 8 per ascus, oblong, fusiform, or oblong-obtuse, 17-24 µm long, 6-11 µm wide, obtuse; septa present; both transversally and longitudinally; wall thin, not thickened at the septum, dark brown, in Lugol's Solution negative, wall not ornamented.

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