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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Elix J. A. (95-06-01) and 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: 5. Tuckneraria. Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Type: Tuckneraria pseudocomplicata (Asahina) Randlane & A. Thell.

Taxonomic Literature: Randlane T., Saag A., Thell A. & Kärnefelt I., Acta Bot. Fenn. 150: 143-151 (1994); Thell A., Goward T., Randlane T., Kärnefelt E.I. & Saag A., Bryologist 98: 696-605 (1995); Thell A., Kärnefelt E.I. & Randlane T., J. Hattori Bot. Lab. 78: 237-242 (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).

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

Thallus: Foliose, not subdivided parts, lobed. Thallus Outline: Soon disappearing. Upper Surface: Green, brownish yellow, olive, or yellow; special structures absent or present:; pseudocyphellate; eciliate or ciliate; without hairs; not isidate or isidiate; not sorediate or sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by holdfasts; special structures absent or present:; pseudocyphellate; not cyphellate; 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 directly at the thallus margin, soon sessile. Margin: Prominent; external filaments absent. Exciple: 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, globose, 5-7 µm long, 4-5 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.

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

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