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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: 1. Blastodesmia. Xanthopyreniaceae Zahlbr. (1926); Dothideales.

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [206] (1985); Massalongo A.B., Ricerche: 180 (1852); Poelt J., Bestimmungsschlüssel Europäischer Flechten: 1-757 [136] (1969).

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

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Perithecioid, orbicular, forming all across the thallus surface, not emerging. Margin: External filaments absent. Periphyses: Absent. Interascal Hyphae: Absent or present, scarcely branched, not or scarcely anastomosed.

Ascospores: c. 8 per ascus, oblong, 24-30 µm long, 6-10 µm wide, obtuse; septa present; transversally septate, 5-9-transversally septate; wall not thickened at the septum, dark brown, in Lugol's Solution negative.

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