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Skyttea Sherwood, D. Hawksw. & Coppins (1981)

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); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 20. Skyttea. Odontotremataceae D. Hawksw. & Sherwood (1982); Ostropales.

Type Information: Type: Skyttea nitschkei (Körb.) Sherwood, D. Hawksw. & Coppins.

Taxonomic Literature: Alstrup V. & Hansen E.S., Graphis Scripta 12: 41-50 (2001);
Diederich P. & Etayo J., Lichenologist 32(5): 423-485 (2000);
Diederich P. & Etayo J. in Nash, T.H. et al. (eds), Lichen flora
of the Greater Sonoran Desert Region vol. 2, 693-695, Tempe (2004);
Eriksson O.E. & Hawksworth D.L., Syst. Ascomycetum 10: 27-67 [51-
52] (1991); Etayo J. & Diederich P., Lichenologist 30(2): 103-120
[113-114] (1998); Hafellner J., Herzogia 10: 1-28 [22-23] (1994);
Iturriaga T. & Hawksworth D.L., Mycologia 96(4): 925-928 (2004);
Kümmerling H., Triebel D. & Rambold G., Biblioth. Lichenol.
53: 147-160 [157] (1993); Sherwood-Pike M.A., Mycotaxon 28: 137-177
[143, 172] (1987); Sherwood M.A., Hawksworth D.L. & Coppins B.J.,
Trans. Brit. Mycol. Soc. 75: 479-490 (1981) - excl. Skyttea cruciata,
S. thallophila; Triebel D., Biblioth. Lichenol. 35: 1-278 [142-147]
(1989) - sub Rhymbocarpus, excl. R. punctiformis.

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

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

Lichen Photobionts: Primary photobiont absent. Secondary photobiont absent.

Thallus: Indistinct.

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: Apothecioid or perithecioid, orbicular, not emerging, becoming adnate to soon sessile. Margin: Prominent; external filaments present. Exciple: Black, violet, green, olive, or brown. Periphyses: Absent. Epithecium: Apical cells hyaline, green, or olive. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White, violet, green, olive, or brown.

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

Ascospores: c. 8 per ascus, ellipsoid, ovoid, oblong-obtuse, oblong, fusiform, or curved, 4-46 µm long, 2-4.5 µm wide, obtuse or aciculate; septa absent or present; transversally septate, 1-3-transversally septate; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)

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