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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: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 5 (estimation provided by A. Aptroot 99-09-27). Clauzadea. Porpidiaceae Hertel & Hafellner (1984); Cladoniineae; Lecanorales.

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [335-336] (1985); Hawksworth D.L. in: Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and Ireland, London (1992).

Biogeography: Checklist records: Austria, Germany, Great Britain, Italy, and United States and Canada (continental).

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

Thallus: Indistinct or crustose, not subdivided parts, granular, rimose, or areolate (primarily areolate). Thallus Outline: Soon disappearing or persistent. Upper Surface: Grey, brownish yellow, or white; special structures absent. 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, not emerging, becoming adnate to soon sessile. Margin: Indistinct to prominent; external filaments absent. Exciple: Black or brown. Periphyses: Absent. Epithecium: Apical cells brown. Interascal Hyphae: Present, scarcely branched to distinctly branched, not or scarcely anastomosed to distinctly anastomosed. Hypothecium: Brown, white, or brownish yellow.

Ascospores: c. 8 per ascus, ellipsoid or fusiform, 10-28 µm long, 4-12 µm wide, obtuse or aciculate; septa absent; wall thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented or ornamented.

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

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