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Sphaerulina Sacc. (1878)

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: 40. Sphaerulina. Mycosphaerellaceae Lindau (1897); Dothideales.

Type Information: Type: Sphaerulina myriadea (Fr.) Sacc.

Taxonomic Literature: Barr M.E., Contr. Univ. Michigan Herb. 9: 523-638 [605-608] (1972); Bose S.K. & Müller E., Indian Phytopathol. 20: 124-138 (1967); Hawksworth D.L., Lichenologist 15: 1-44 [15, 39] (1983); Keissler K. von, Rabenh. Kryptog.-Fl. 8: 1-712 [435-439] (1930); Kohlmeyer J. & Kohlmeyer E., Marine mycology. The higher fungy. Academic Press. New York: 1-690 [455-457] (1979); Nylander W., Flora 48: 353-358 (1865) - sub Verrucaria dubiella; Sivanesan A., The bitunicate ascomycetes and their anamorphs: 1-701 [270-274] (1984); Vouaux L., Bull. Trimestriel Soc. Mycol. France 29: 33-128 [35-38] (1913).

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

Ecology: Biotroph or saprobic; lichenicolous or phytopathogenic; terricolous, bryophytic, lignicolous, or epiphyllous; substrate non-calciferous or calciferous.

Lichen Photobionts: Primary photobiont absent. Secondary photobiont absent.

Thallus: Indistinct.

Medulla: Iodine reaction 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, stromatic. Margin: External filaments absent or present. Exciple: Black, brown, white, or brownish yellow. Periphyses: Present. Hymenium: Iodine reaction: hemiamyloid. Interascal Hyphae: Absent or present, scarcely branched, not or scarcely anastomosed. Hypothecium: Black, brown, white, or brownish yellow.

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

Ascospores: c. 4 to c. 8 per ascus, ellipsoid, oblong, curved, cylindrical, filiform, fusiform, oblong-obtuse, or ovoid, 12-18 µm long, 1.5-8 µm wide, obtuse or aciculate; septa absent or present; transversally septate, 1-7-transversally septate; wall thin, not thickened at the septum, hyaline or pale brown, in Lugol's Solution negative, wall not ornamented.

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

Conidia: Bacilliform.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)

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