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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Aptroot A. (00-03-20), Triebel D. (00-03-27), and Scholz P. (02-05-15); not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 12. Leptorhaphis. Synonyms: Cresporhaphis Aguirre; Xanthopyreniaceae Zahlbr. (1926); Pyrenulales.

Taxonomic Literature: Aguirre-Hudson B., Bull. Br. Mus. Hist., Bot. 21: 85-192 (1991); Aguirre B. & Hawksworth D.L., Biblioth. Lichenol. 25: 249-255 (1987); Aptroot A. in: Nash T.H. III et al. (eds) Lichen Flora of the Greater Sonoran Desert Region vol. 1, 266, Tempe (2002); Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest, N.S. 7: 1-893 [500] (1985); Galloway D.J., Flora of New Zealand. Lichens: 1-662 [254] (1985); Hawksworth D.L. & Aguirre-Hudson B. in: Purvis O.W. et al. (eds), The lichen flora of Great Britain and Ireland: 1- 710 [356- 358] (1992); Kalb K., Hafellner J. & Staiger B., Biblioth. Lichenol. 59: 199-222 [204-207, fig. 4-9] (1995).

Biogeography: Checklist records: Austria, Germany, Great Britain, Italy, Sonoran Desert, Sweden and Norway, and United States and Canada (continental).

Ecology: Saprobic or biotroph (a few species loosely associated with trentepohlioid algae); algicolous or lichenized (a few species loosely associated with trentepohlioid algae); corticolous.

Lichen Photobionts: Primary photobiont absent or present; trentepohlioid (loosely associated). Secondary photobiont absent.

Thallus: Indistinct or crustose, not subdivided parts. Upper Surface: Grey, greenish green, or white; special structures absent. Lower Surface: Attached by the whole lower surface; special structures absent.

Medulla: Iodine reaction in Lugol's solution negative; not different with or without KOH pre-treatment (euamyloid).

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Perithecioid, orbicular, not emerging, becoming adnate or soon sessile. Wall: Not carbonized or with a carbonized black clypeus around the ostiole, not fused. Margin: External filaments absent. Exciple: Greenish black, brown, white, or brownish yellow. Periphyses: Absent. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid or hemiamyloid. Interascal Hyphae: Present, scarcely branched or distinctly branched, not or scarcely anastomosed or distinctly anastomosed. Hypothecium: White.

Asci: Tholus thickened, not amyloid; ocular chamber broad; dehiscence bitunicate; exoascus not amyloid, not hemiamyloid.

Ascospores: c. 8 or 12-16 per ascus, filiform or curved, 20-45 µm long, 1.5-3.5 µm wide, obtuse or aciculate; septa absent or present; transversally septate, 1-3-transversally septate, formed by the proper spore wall; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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

Conidiogeneous Cells: Apical. Conidia: Filiform, bacilliform, or curved; microconidial or macroconidial.

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