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Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Triebel D. (98-01-01; 01-08-12; 01-08-15); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 13. Roselliniella. Genus of unknown placement (incertae sedis); Sordariales.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M., Biblioth. Lichenol. 64: 1-220 [174-179](1997); Hawksworth D.L. & Miadlikowska J., Mycol. Res. 101(9): 1127-1134 (1997); Hoffmann N. & Hafellner J., Biblioth. Lichenol. 77: 1-190 [91-98] (2000); Kocourková J., Acta Mus. Nat. Pragae, Ser. B., Hist. Nat. 55 (3-4): 59-169 [114-115] (2000); Matzer M., Mycol. Papers 171: 1-202 [181] (1996); Matzer M. & Hafellner J.,
Biblioth. Lichenol. 37: 1-138 [53-90, 1 37, 138] + pl. (1990); Matzer
M. & Pelzmann B., Nova Hedwigia 52: 1-9 (1991).

Biogeography: Checklist records: Austria, Germany, Great Britain, New Guinea, New Zealand, and Sweden and Norway.

Ecology: Biotroph; lichenicolous; terricolous, lignicolous, corticolous, or epiphyllous; substrate non-calciferous or calciferous.

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 to soon sessile. Wall: Not fused. Margin: External filaments absent or present. Exciple: Dark brown. Periphyses: Present. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Dark brown.

Asci: Tholus not thickened, not amyloid; dehiscence unitunicate; exoascus not amyloid, not hemiamyloid.

Ascospores: 1–2, c. 4, or c. 8 per ascus, globose, broadly ellipsoid, ellipsoid, ovoid, or fusiform, 8-53 µm long, 4-20 µm wide, obtuse or aciculate; septa absent or present; transversally septate, 1-4-transversally septate, formed by the proper spore wall; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, not constricted where the septum meets the spore wall, dark brown, hyaline, or pale brown, in Lugol's Solution negative, wall not ornamented or ornamented.

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