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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: accepted. Taxonomic rank: genus. Number of known taxa within this rank: 10. Phlyctis. Synonyms: Phlyctella Kremp.; Phlyctidaceae Poelt & Vezda ex J.C. David & D. Hawksw. (1991); of unknown placement (incertae sedis).

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero
Special 7: 1-893 [590-591] (1985); Laundon J.R., Lichenologist 4: 297-
308 (1970); Galloway D.J., Flora of New Zealand Lichens: i-lxxiii, 1-
662 [385-389], Wellington (1985) - sub Phlyctella Kremp.; James P.W.
& Hitch C.J.B. in: Purvis O.W. et al. (eds), The Lichen Flora of
Great Britain and Ireland, London (1992).

Biogeography: Checklist records: Austria, Germany, Great Britain, Guianas, Italy, New Zealand, Sonoran Desert, Sweden and Norway, Thailand, United States and Canada (continental), and Republic of South Africa.

Lichen Photobionts: Primary photobiont present; chlorococcal. Primary photobiont taxonomy: Dictyochloropsis (A. Beck 22-05-97); genus incertae sedis; Dictyochloropsis-group, Trebouxiophyceae, Eukariota. Secondary photobiont absent.

Thallus: Indistinct or crustose, not subdivided parts, leprose, granular, or rimose. Thallus Outline: Soon disappearing or persistent. Upper Surface: Grey or olive; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate or isidiate; not sorediate or sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent or present:; not pseudocyphellate; not cyphellate; not rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

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 distinct; external filaments absent. Exciple: White or brownish yellow. Periphyses: Absent. Epithecium: Apical cells black, brown, hyaline, or brownish yellow. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed to distinctly anastomosed. Hypothecium: Black, brown, white, or brownish yellow.

Ascospores: 1–2 to c. 8 per ascus, globose, broadly ellipsoid, ellipsoid, fusiform, cylindrical, oblong-obtuse, or oblong, 35-390 µm long, 4-50 µm wide, obtuse or aciculate; septa present; transversally septate or both transversally and longitudinally, 3-23-transversally septate; wall thin, not thickened at the septum, hyaline or pale brown, in Lugol's Solution negative, wall not ornamented.

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

Secondary Metabolites: Present, of the following substance class(es): ß-orcinol depsidones.

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