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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. Number of known taxa within this rank: 1. Squamacidia. Biatoraceae A. Massal. ex Stiz. (1862); Lecanorineae; Lecanorales.

Taxonomic Literature: Brako L., Mycotaxon 35: 1-19 (1989); Kalb K. & Elix J.A. in Knoph J.-G., Schrüfer K. & Sipman H.J.M., Biblioth. Lichenol. 57: 265-296 [280] (1995).

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

Thallus: Crustose, not subdivided parts, squamulose. Thallus Outline: Soon disappearing or persistent. Upper Surface: Special structures present:; not pseudocyphellate; eciliate; without hairs; isidiate; not sorediate; not cephalodiate; not lobulate or lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent or present:; not pseudocyphellate; not cyphellate; not 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 to prominent; external filaments absent. Exciple: Brown. Periphyses: Absent. Epithecium: Apical cells hyaline. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: 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, 24-40 µm long, 2.5-4 µm wide, obtuse or aciculate; septa present; transversally septate, 1-3-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; immersed or sessile, formed all accross the thallus surface.

Secondary Metabolites: Present, of the following substance class(es): orcinol depsidones and ß-orcinol depsidones.

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