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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); revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 4. Rosellinula. Genus of unknown placement (incertae sedis); Dothideales.

Taxonomic Literature: Alstrup V., Nord. J. Bot. 1: 120-124 (1981); Hafellner J., Herzogia 7: 145-162 (1986) ["1985"] - sub Roselliniella; Matzer M. & Hafellner J., Biblioth. Lichenol. 37: 1-138 [35] (1990).

Biogeography: Checklist records: Austria, Sonoran Desert, Sweden and Norway, and New Zealand.

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, not emerging. Margin: External filaments absent. Exciple: Black or brown. Periphyses: Absent. Hymenium: Iodine reaction: Lugol’s positive, not hemiamyloid. Interascal Hyphae: Present, scarcely branched to distinctly branched, not or scarcely anastomosed to distinctly anastomosed. Hypothecium: Brown.

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

Ascospores: More than 32 per ascus, ellipsoid, broadly ellipsoid, or globose, 2-11 µm long, 2-6.5 µm wide, obtuse; septa absent; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, dark brown, in Lugol's Solution negative, wall not ornamented.

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