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Sphaerellothecium Zopf (1897)

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; 06-12-18) 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: 7-13. Sphaerellothecium. Genus of unknown placement (incertae sedis); Dothideales.

Type Information: Type: Sphaerellothecium araneosum (Rehm ex Arnold) Zopf.

Taxonomic Literature: Alstrup, V. & Cole, M.S., Bryologist 101(2): 221-229 (1998); Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M., Biblioth. Lichenol. 64: 1-220 [180-181] (1997); Etayo J. & Diederich P, Lichenologist 30(2): 103-120 [114-119] (1998); Hafellner J., Herzogia 9: 749-768 (1993); Hafellner J. & John, V., Herzogia 19: 155-176 [168-169] (2006); Hafellner J., Obermayer S. & Obermayer W., Mitt. Naturwiss. Ver. Steiermark 134: 57-103 [96-98] (2005); Hansen E.S. & Alstrup V., Graphis Scripta 7: 33-38 (1995); Ihlen P.G., Lichenologist 30: 27-57 [52-53] (1998); Kocourková J., Acta Mus. Nat. Pragae, Ser. B., Hist. Nat. 55 (3-4): 59-169 [120-121] (2000); Roux C. & Triebel D.,
Bull. Soc. Linn. Provençe 45: 451-542 (1994); Roux C., Triebel D., Bricaud O. & Le Coeur D., Canad. J. Bot. 73: 622-672 (1995); Triebel D., Biblioth. Lichenol. 35: 1-278 [70-79] (1989); Triebel D., Rambold G. & Nash III T.H., Mycotaxon 42: 263-296 (1991); Zhurbenko M.P. & Alstrup V., Acta Univ. Upsal. Symb. Bot. Upsal. 34(1): 477-499 (2004).

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

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

Lichen Photobionts: Primary photobiont absent. Secondary photobiont absent.

Thallus: Indistinct, filamentose.

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. Margin: External filaments absent or present. Exciple: Black, brownish yellow, or brown. Periphyses: Present. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Absent or present, scarcely branched to distinctly branched, not or scarcely anastomosed to distinctly anastomosed. Hypothecium: White, brownish yellow, or brown.

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

Ascospores: c. 8 per ascus, ellipsoid, broadly ellipsoid, ovoid, or oblong-obtuse, 6.5-22 µm long, 3-8 µm wide, obtuse or aciculate; septa present; transversally septate, 1-3-transversally septate, formed by the proper spore wall; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, laterally constricted where the septum meets the spore wall, hyaline, pale brown, or dark brown, in Lugol's Solution negative, wall not ornamented or ornamented.

Conidiomata: Absent resp. not observed or present; pycnidial; immersed.

Conidiogeneous Cells: Apical. Conidia: Bacilliform.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)

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