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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Aptroot A. (95-02-10); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 1. Thamnochrolechia. Pertusariaceae Körb. (1855); Peltigerineae; Lecanorales.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M., Biblioth. Lichenol. 64: 1-220 [196-197] (1997); Aptroot A. & Sipman H.J.M., Willdenowia 20: 221-256 (1991); Lumbsch H.T., Dickhäuser A. & Feige G.B., Biblioth. Lichenol. 57: 355-361 (1995).

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

Thallus: Crustose, granular. Upper Surface: Grey, brownish yellow, or white; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate or isidiate; not sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent.

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 to substipitate. Margin: Prominent; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells hyaline or brownish yellow. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: White.

Ascospores: c. 8 per ascus, ellipsoid, oblong-obtuse, or ovoid, 25-30 µm long, 17-20 µm wide, obtuse; 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.

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

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

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