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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Poelt J. (95-03-14); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 1. Xanthodactylon. Teloschistaceae Zahlbr. (1898); Teloschistineae; Lecanorales.

Taxonomic Literature: Duvigneaud P.A., Bull. Jard. Bot. Brux. 16: 259-265 (1941);
Kärnefelt I., Cryptog. Bot. 147-203 (1989).

Ecology: Biotroph; lichenized; terricolous or corticolous; substrate non-calciferous.

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

Thallus: Crustose, not subdivided parts, subfruticose. Upper Surface: Yellow or orange; 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 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: Distinct to prominent; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells orange. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

Asci: Tholus thickened, amyloid, entirely amyloid throughout; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, ellipsoid, obtuse; septa absent; wall thin, thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Secondary Metabolites: Present, of the following substance class(es): (anthra-)quinones.

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