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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: 4 (A. Aptroot 99-09-27). Gomphillus. Gomphillaceae W. Watson ex Hafellner (1984); Ostropales.

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest, N.S. 7: 1-893 [371] (1985); Hafellner J. in: Hertel H. & Oberwinkler F. (eds), Beih. Nova Hedwigia 79: 241-371 [280-281] (1984); James P.W. & Brightman F.H. in: Purvis O.W., Coppins B.J., Hawksworth D.L., James P.W. & Moore D.M. (eds), The lichen flora of Great Britain and Ireland: 1-710 [256-257] (1992); Vezda A., Folia Geobot. Phytotax. 14: 43-94 (1979); Vezda A. & Poelt J., Folia Geobot. Phytotax. 22: 179-198 (1987).

Biogeography: Checklist records: Great Britain, Italy, Sweden and Norway, United States and Canada (continental), and New Guinea.

Lichen Photobionts: Primary photobiont present; chlorococcal. Secondary photobiont absent.

Thallus: Indistinct or crustose, not subdivided parts. Upper Surface: 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, orbicular, forming all across the thallus surface, soon sessile to substipitate. Margin: Prominent; external filaments absent. Exciple: White or brownish yellow. Periphyses: Absent. Epithecium: Apical cells brown. Interascal Hyphae: Present, scarcely branched, distinctly anastomosed.

Ascospores: c. 8 per ascus, filiform, 160-200 µm long, 1-3 µm wide, obtuse; septa present; transversally septate, 25-100-transversally septate; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Present or absent resp. not observed; pycnidial; formed all accross the thallus surface.

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