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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); revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 11 (A. Aptroot 99-09-27). Degelia. Genus of unknown placement (incertae sedis); Peltigerineae; Lecanorales.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M., Biblioth. Lichenol. 64: 1-220 [55-57] (1997); Arvidsson L. & Galloway D.J., Lichenologist 13: 27-50 (1981); Galloway D.J., Flora of New Zealand Lichens: i-lxxiii, 1-662 [150-152], Wellington (1985); Jørgensen P.M., Opera Bot. 45: 1-123 (1978); James P.W. & Purvis O.W. in: Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and Ireland, London (1992); Jørgensen P.M. & James P.W., Biblioth. Lichenol. 38: 253-276 (1990).

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

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

Thallus: Crustose or foliose, not subdivided parts, placodioid or rimose, lobed. Thallus Outline: Soon disappearing or persistent. Upper Surface: Grey; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate or isidiate; not 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.

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. Margin: Distinct; external filaments absent. Periphyses: Absent. Epithecium: Apical cells brown or brownish yellow. Hymenium: Iodine reaction: Lugol’s positive, not hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White or rarely brownish yellow.

Asci: Tholus thickened, amyloid, with amyloid cap; dehiscence lecanoralean; exoascus euamyloid.

Ascospores: c. 8 per ascus, ellipsoid, 17-25 µm long, 7-10 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; stipitate, formed all accross the thallus surface or along the thallus periphery.

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