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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: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 1. Trimmatothelopsis. Verrucariaceae Zenker (1827); Verrucariales.

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [762] (1985); Poelt J., Bestimmungsschlüssel Europäischer Flechten: 1-757 [673] (1969); Zschacke H., Rabenhorst's Kryptog. Fl. ed. 2, 9: 590, 593-594 (1934).

Thallus: Crustose, squamulose. 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: Perithecioid, orbicular, forming all across the thallus surface, not emerging. Margin: External filaments absent. Exciple: White. Periphyses: Absent. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed.

Ascospores: More than 32 per ascus, ellipsoid, 3-4 µm long, 1-1.5 µm wide, obtuse; septa absent; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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