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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 or basionymous. Taxonomic rank: genus. Szczawinskia. Biatoraceae A. Massal. ex Stiz. (1862); Lecanorineae; Lecanorales.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M., Biblioth. Lichenol. 64: 1-220 [191-195] (1997); Brodo I. & Tønsberg T., Acta Bot. Fenn. 150: 1-4 (1994) - sub Micarea clavopycnidiata.

Biogeography: Checklist records: United States and Canada (continental) and New Guinea.

Lichen Photobionts: Primary photobiont present. Secondary photobiont absent or present.

Thallus: Crustose, granular. Upper Surface: Green or olive; special structures present:; not pseudocyphellate; eciliate; without hairs; not isidate; not sorediate; cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent.

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, becoming adnate. Margin: Distinct; external filaments absent. Exciple: Brownish yellow. Epithecium: Apical cells black or green. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: Black or brown.

Asci: Tholus thickened, amyloid, with non-amyloid narrow axial body and amyloid convergent flanks towards apex; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, filiform, 60-74 µm long, 3-3.5 µm wide, aciculate; septa present; transversally septate, 5-8-transversally septate; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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

Secondary Metabolites: Present, of the following substance class(es): orcinol depsides?

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