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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: 2. Phylliscum. Lichinaceae Nyl. (1854); Lichinales.

Taxonomic Literature: Henssen A., Svensk Bot. Tidskr. 57: 145-160 (1963); Santesson R., The lichens and lichenicolous fungi of Sweden and Norway, Lund: 1-240 [116] (1993); Rambold G & Triebel D., Biblioth. Lichenol. 48: 1-201 [116] (1992).

Biogeography: Checklist records: Germany, Sonoran Desert, Italy, Sweden and Norway, and United States and Canada (continental).

Ecology: Biotroph; lichenized or lichenicolous; terricolous or bryophytic; substrate non-calciferous.

Lichen Photobionts: Primary photobiont present; cyanobacterial. Primary photobiont taxonomy: Chroococcales, Cyanobacteria, Prokaryota. Secondary photobiont absent.

Thallus: Crustose or foliose, not subdivided parts, granular, umbilicate. Upper Surface: Black, brown, or red; special structures absent. Lower Surface: Attached by holdfasts; special structures absent.

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, becoming adnate. Margin: Indistinct to prominent; external filaments absent. Periphyses: Absent. Interascal Hyphae: Absent or present, distinctly branched, distinctly anastomosed.

Ascospores: c. 8 to 16-32 per ascus, ellipsoid, broadly ellipsoid, or globose, 7-15.5 µm long, 3-13 µm wide, obtuse; septa absent; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present; pycnidial; formed all accross the thallus surface.

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