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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Jørgensen P. M. (98-03-20) 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: 35. Parmeliella. Pannariaceae Tuck. (1872); Peltigerineae; Lecanorales.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M.,
Biblioth. Lichenol. 64: 1-220 [128] (1997); Galloway D.J., Flora of
New Zealand Lichens: i-lxxiii, 1-662 [344-350], Wellington (1985);
Jørgensen P.M., Opera Bot. 45: 1-123 (1978); Jørgensen P.M. in: Nash T.H. III et al. (eds) Lichen Flora of the Greater Sonoran Desert Region vol. 1, 310-312, Tempe (2002); Keuck G., Biblioth. Lichenol. 6: 1-175 (1977); Purvis O.W. in: Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and Ireland, London (1992).

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

Ecology: Biotroph; lichenized; terricolous, bryophytic, corticolous, or epiphyllous; substrate non-calciferous.

Lichen Photobionts: Primary photobiont present; cyanobacterial. Primary photobiont taxonomy: Nostoc and Scytonema; Nostocaceae and Scytonemataceae; Nostocales, Cyanobacteria, Prokaryota. Secondary photobiont absent.

Thallus: Crustose or foliose, not subdivided parts, squamulose, placodioid, granular, or areolate (primarily areolate), lobed. Thallus Outline: Soon disappearing or persistent. Upper Surface: Bluish grey, brown, or olive; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate or isidiate; not sorediate or sorediate; not cephalodiate; not lobulate or lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface or attached by holdfasts; special structures absent or present:; not pseudocyphellate; not cyphellate; not rhizinate or rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose or 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, soon sessile or substipitate. Margin: Prominent; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells brown. Hymenium: Iodine reaction: Lugol’s positive. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Brownish yellow.

Ascospores: c. 8 per ascus, ellipsoid, fusiform, ovoid, or oblong, 11-25 µm long, 4-11 µm wide, obtuse or aciculate; 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 or sessile, formed all accross the thallus surface.

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