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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Tehler A. (95-11-27); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 1. Pentagenella. Roccellaceae Chevall. (1826); Arthoniales.

Taxonomic Literature: (Darbishire O.V., Ber. Deutsch. Bot. Ges. 15: 2-10 (1897); Tehler A., Can. J. Bot. 68: 2458-2492 (1990)); Follmann G., Huneck S., Schulz M. & Sánchez-Pinto L., Herzogia 9: 653-668 (1993).

Thallus: Fruticose, not subdivided parts. Upper Surface: Special structures absent. 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 all across the thallus surface, becoming adnate to soon sessile. Margin: Prominent. Exciple: White. Interascal Hyphae: Present. Hypothecium: White.

Ascospores: c. 8 per ascus, obtuse; septa present; transversally septate; wall not thickened at the septum, hyaline, in Lugol's Solution negative.

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