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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Timdal E. (95-04-20); revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 1. Boreoplaca. Catillariaceae Hafellner (1984); Teloschistineae; Lecanorales.

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

Thallus: Crustose, squamulose, rimose, placodioid, or areolate (primarily areolate). Thallus Outline: Soon disappearing. Upper Surface: Brownish yellow; special structures absent. Lower Surface: Attached by holdfasts; special structures present:; not pseudocyphellate; not cyphellate; rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

Medulla: Iodine reaction in Lugol's solution negative; not different with or without KOH pre-treatment (euamyloid).

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: Prominent; external filaments absent. Exciple: Black, green, white, brownish yellow, or olive. Periphyses: Absent. Epithecium: Apical cells black or green. Hymenium: Iodine reaction: Lugol’s positive, not hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White or brownish yellow.

Asci: Tholus thickened, amyloid, entirely amyloid throughout; dehiscence lecanoralean; exoascus euamyloid, not hemiamyloid.

Ascospores: c. 8 per ascus, ellipsoid, broadly ellipsoid, or globose, 5-7 µm long, 3.5-4.5 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; immersed, formed all accross the thallus surface.

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

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