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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Schultz M. (00-03-02) and Scholz P. (02-05-16); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 10. Porocyphus. Lichinaceae Nyl. (1854); Lichinales.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M., Biblioth. Lichenol. 64: 1-220 [145] (1997); Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [631] (1985); Coppins B.J. & Gilbert O.L. in: Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and Ireland, London (1992); Ellis L.T., Lichenologist 13: 123-139 (1981); Henssen A., Symb. Bot. Upsal. 18: 1-123 [61-71] (1963); Henssen A., Lichenologist 6: 106-111 (1974); Poelt J., Bestimmungsschlüssel Europäischer Flechten: 1-757 [537-538] (1969); Schultz M. in: Nash T.H. III et al. (eds) Lichen Flora of the Greater Sonoran Desert Region vol. 1, 406-407, Tempe (2002).

Biogeography: Checklist records: Austria, Germany, Great Britain, Italy, New Guinea, Sonoran Desert, Sweden and Norway, and United States and Canada (continental).

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

Lichen Photobionts: Primary photobiont present; cyanobacterial. Primary photobiont taxonomy: Calothrix (A. Beck 19-05-97); Rivulariaceae (probably not obligatory); Chroococcales, Cyanobacteria, Prokaryota. Secondary photobiont absent.

Thallus: Crustose, placodioid, subfruticose, granular, rimose, or areolate (primarily areolate). Thallus Outline: Soon disappearing. Upper Surface: Black, brown, or olive; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate; not sorediate; not cephalodiate; not lobulate; without granules or sometimes with granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures 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, orbicular, forming all across the thallus surface or directly at the thallus margin, not emerging, becoming adnate or soon sessile. Wall: Not carbonized, not fused. Margin: Indistinct, distinct, or prominent; external filaments absent. Exciple: Brown, white, or brownish yellow (faintly). Periphyses: Absent. Epithecium: Apical cells brownish yellow. Hymenium: Iodine reaction: Lugol’s negative, hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White or brownish yellow (rarely faintly).

Asci: Tholus not thickened, not amyloid; ocular chamber indistinct; dehiscence prototunicate; exoascus not amyloid, not hemiamyloid.

Ascospores: c. 8 per ascus, broadly ellipsoid or ellipsoid, 8-24 µm long, 5-13 µm wide, obtuse; septa absent; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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

Conidiogeneous Cells: Apical. Conidia: Ellipsoid; microconidial, not branched; aseptate; cell wall hyaline.

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