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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: 3. Calotrichopsis. Lichinaceae Nyl. (1854); Lichinales.

Taxonomic Literature: Henssen A., Symb. Bot. Upsal. 18: 1-123 [58-60] (1963); Vainio E., Acta Soc. Fauna Fl. Fenn 7(1): 1-256 [243-244] (1890).

Lichen Photobionts: Primary photobiont present; cyanobacterial. Primary photobiont taxonomy: Calothrix (A. Beck 19-05-97); Rivulariaceae; Chroococcales, Cyanobacteria, Prokaryota. Secondary photobiont absent.

Thallus: Crustose, filamentose or granular. Upper Surface: Black or olive; 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: Apothecioid or perithecioid, orbicular, forming all across the thallus surface, not emerging, becoming adnate to soon sessile. Margin: External filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells hyaline. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White or brownish yellow.

Ascospores: c. 8 per ascus, ellipsoid or globose, 5.5-12.5 µm long, 4-8 µm wide, obtuse; septa absent; wall not thickened at the septum, hyaline, in Lugol's Solution negative.

Conidiomata: Absent resp. not observed or present; pycnidial; formed all accross the thallus surface.

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