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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 prolificans Müll. Arg. 1892. Nuovo Giorn. Bot, Italiano 24(3): 197.

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: Soon sessile, strongly constricted at the base, .5-1.5 mm in diam.. Margin: Indistinct (rather). Disk: Strongly convex (to hemispherical), brown. Exciple: Pale brown or white. Epithecium: Apical cells distinctly swollen; brown. Hymenium: White. Hypothecium: White. Hypothecial Extension: Absent.

Ascospores: c. 8 per ascus, (15)-16-17-(20) µm long, 3-4 µm wide, aciculate; septa absent; wall thin, not ornamented.

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