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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: 2. Cladidium. Lecanoraceae Körb. (1855); Lecanorineae; Lecanorales.

Biogeography: Checklist records: Sonoran Desert and United States and Canada (continental).

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

Thallus: Crustose, not subdivided parts, squamulose, subfruticose, or granular. Upper Surface: Grey, brownish yellow, or olive; special structures absent or present:; not pseudocyphellate or pseudocyphellate; eciliate; without hairs; not isidate; not sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface or attached by holdfasts; special structures absent.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, forming directly at the thallus margin, soon sessile to stipitate. Margin: Prominent; external filaments absent. Exciple: White, brownish yellow, orange, or yellow. Periphyses: Absent. Epithecium: Apical cells hyaline or brownish yellow. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White, brownish yellow, orange, or yellow.

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

Ascospores: c. 8 per ascus, ellipsoid, oblong, oblong-obtuse, or ovoid, 8-16 µm long, 5-8 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 or stipitate, formed along the thallus periphery.

Secondary Metabolites: Present, of the following substance class(es): dibenzofurans [and usnic acids].

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