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Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Triebel D. (98-01-01); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 1. Pyrgidium. Sphinctrinaceae M. Choisy (1950); of unknown placement (incertae sedis).

Type Information: Type: Pyrgidium bengaliense Nyl. (= P. montellicum (Beltr.) Tibell).

Taxonomic Literature: Tibell L., Lichenologist 14: 219-254 [239-242] (1982); Tibell L. in: Hertel H. & Oberwinkler F. (eds), Beih. Nova Hedwigia 79: 597-713 (1984); Tibell L., Symb. Bot. Ups. 27: 1-279 [201-204] (1987); Tibell L., Flora Neotropica Monograph 69: 1-78 [58-60] (1996).

Thallus: Indistinct or crustose, not subdivided parts, granular. Upper Surface: Grey or brownish yellow; special structures absent. 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 or perithecioid, orbicular, forming all across the thallus surface, soon sessile to substipitate. Margin: Distinct to prominent; external filaments absent. Exciple: Black or brown. Periphyses: Absent. Hymenium: Mazaedioid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed.

Ascospores: c. 8 per ascus, ellipsoid, 5.5-7 µm long, 3-4.5 µm wide, obtuse; septa present; transversally septate, 1-transversally septate; wall not thickened at the septum, dark brown, in Lugol's Solution negative, wall ornamented.

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