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Data Set Maintenance: Data set standard item. Data set author(s): Knoph J.-G., Rambold G. & Triebel D. (94-07-19). Data set reviewer(s): Kainz C. (00-11-15); to be published after submission; 94-07-19.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Carbonea. Synonyms: Lecidea nivaria (Arnold) Dalla Torre & Sarnth.; Lecanoraceae Körb. (1855).

Thallus: Crustose, granular, rimose, or areolate (primarily areolate); separate thallus parts thin (0.1 - 0.5 mm). Thallus Outline: Persistent. Upper Surface: Grey or white; special structures absent. Lower Surface: Special structures present:

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Soon sessile, slightly constricted at the base, .2-.7 mm in diam.. Margin: Persistent, prominent. Disk: Plane to weakly convex, black, epruinose, without an umbo. Exciple: Black, brown, or brownish yellow. Parathecium (proper excipulum): Brown. Amphithecium (thalline excipulum): Present. Epithecium: Apical cells slightly swollen, green or turquoise (intensely). Hymenium: White. Hypothecium: White.

Ascospores: Ellipsoid, (8)-8-8.4-8.7-(9.5) µm long, (4.5)-5.1-5.6-6-(6.5) µm wide; septa absent.

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