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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Randlane T. (98-05-28); revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 3. Allocetraria. Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Taxonomic Literature: Elix J.A., Bryologist 96: 359-383 (1993); Kärnefelt I. & Thell A., Nova Hedwigia 62: 487-511 (1996); Kurokawa S. & Lai M.-J., Bull. National Science Museum Tokyo, series B (Botany) 17: 59-65 (1991); Randlane T., Saag A. & Thell A., Bryologist 100: 109-122 (1997); Randlane T. & Saag A., Mycotaxon 44: 59-65 (1992); Thell A., Goward T., Randlane T., Kärnefelt E.I. & Saag A., Bryologist 98: 696-605 (1995); Thell A., Randlane T., Kärnefelt I., Gao X.-Q. & Saag A., in: Daniels F.J.A., Schulz M. & Peine J. (eds): Flechten Follmann: 353-370, Cologne (1995).

Biogeography: Checklist records: Austria, Germany, Italy, and United States and Canada (continental).

Ecology: Biotroph; lichenized; terricolous, bryophytic, lignicolous, or corticolous.

Lichen Photobionts: Primary photobiont present; chlorococcal. Secondary photobiont absent.

Thallus: Foliose or fruticose, not subdivided parts, lobed. Thallus Outline: Soon disappearing. Upper Surface: Brown, green, or yellow; special structures absent or present:; not pseudocyphellate or pseudocyphellate; eciliate; without hairs; not isidate or isidiate; not sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by holdfasts; special structures present:; 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, directly at the tip of the thallus parts, soon sessile. Margin: Prominent; external filaments absent. Exciple: Grey or white. Periphyses: Absent. Epithecium: Apical cells brown or brownish yellow. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

Asci: Tholus thickened, amyloid, with non-amyloid wide axial body and divergent amyloid flanks towards apex; ocular chamber broad; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, broadly ellipsoid or globose, 5-10 µm long, 4-8 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 or sessile to stipitate, formed all accross the thallus surface or along the thallus periphery.

Secondary Metabolites: Present, of the following substance class(es): ß-orcinol depsidones, (higher) aliphatic acids, (anthra-)quinones, secalonic acids, and dibenzofurans [and usnic acids].

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