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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. & Triebel D. (94-11-15). Data set reviewer(s): Kainz C. (00-12-22); to be published after submission; 94-11-15.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Phacopsis. Parmeliaceae Zenker (1827).

Type Information: Basionym: Nesolechia rufa Müll. Arg. 1893. Bull. Herb. Boissier 1: 47.

Taxonomic Literature: Triebel D. & Rambold G. 1995. A Conspectus of the Genus Phacopsis (Lecanorales). The Bryologist 98(1): 71-83.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Not emerging, becoming adnate, .2-.35 mm in diam.. Margin: Indistinct. Disk: Plane to weakly convex, brown ((dark-)). Exciple: Pale brown or white. Epithecium: Apical cells distinctly swollen; brown. Hymenium: Pale brown or white. Hypothecium: Pale brown (hypothecial hyphae exhibit an I+ violet reaction) or white. Hypothecial Extension: Present.

Ascospores: c. 8 per ascus, (12)-14-17-(19) µm long, (5)-5.5-6.5-(7) µm wide, aciculate; septa absent; wall thin, not ornamented.

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