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Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Scholz P. (06-06-13; 06-08-07) and Triebel D. (98-01-01; 01-08-12); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 5. Roselliniopsis. Genus of unknown placement (incertae sedis); Sordariales.

Taxonomic Literature: Alstrup V., Christensen S.N., Hansen E.S. & Svane S.,
Frothskaparrit 40: 61-121 [104-105] (1994); Etayo J.. Anales Jard.
Bot. Madrid 60(1): 19-25 (2003); Hughes S.J., Mycol. Pap. 42: 1-27
[20-21] (1951) - sub Orbicula tartaricola; Kocourková J., Acta
Mus. Nat. Pragae, Ser. B., Hist. Nat. 55 (3-4): 59-169 [115-116]
(2000); Matzer M., Cryptog. Mycol. 14: 11-19 (1993); Matzer M. &
Hafellner J., Biblioth. Lichenol. 37: 1-138 [97-108, 138] + pl.
(1990); Matzer M. & Pelzmann B., Nova Hedwigia 52: 1-9 (1991).

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

Ecology: Biotroph; lichenicolous; corticolous; 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, becoming adnate to soon sessile, stromatic. Margin: External filaments absent or present. Exciple: Black or brown. Periphyses: Present. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Black or brown.

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

Ascospores: c. 4 to c. 8 per ascus, globose, ellipsoid, broadly ellipsoid, ovoid, or fusiform, 9-24 µm long, 7-13 µm wide, obtuse or aciculate; septa absent or present; transversally septate or both transversally and longitudinally, 1-8-transversally septate; wall thin, not thickened at the septum, hyaline or dark brown, in Lugol's Solution negative, wall not ornamented.

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