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Spirographa Zahlbr. (1903)

Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Triebel D. (98-01-01, 99-05-18); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 2 (A. Aptroot 99-09-27). Spirographa. Odontotremataceae D. Hawksw. & Sherwood (1982); Ostropales.

Type Information: Type: Spirographa spiralis (Müll. Arg.) Zahlbr. (= Spirographa fusisporella (Nyl.) Zahlbr.).

Taxonomic Literature: Hafellner J., Bull. Soc. Linn. Provençe 45: 219-234 [230] (1994); Hawksworth D.L., Notes Roy. Bot. Garden Edinburgh 38: 165-183 [175-176] (1980) - sub Spilonema ascaridiella; Holien H. & Triebel D. Lichenologist 28: 307-313 (1996); Sherwood-Pike M.A., Mycotaxon 28: 137-177 [143, 170-172] (1987) - sub Pleospilis ascaridiella; Triebel D., Biblioth. Lichenol. 35: 1-278 [231] (1989) - sub Pleospilis ascaridiella.

Biogeography: Checklist records: Great Britain, Sonoran Desert, and Sweden and Norway.

Ecology: Biotroph; lichenicolous; terricolous 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 absent. Exciple: Brown, olive, red, violet, or yellow. Periphyses: Absent. Epithecium: Apical cells brown, olive, orange, or yellow. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Brown, white, brownish yellow, red, violet, or yellow.

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

Ascospores: c. 8 or 16-32 per ascus, curved or filiform, 15-40 µm long, 1.5-4 µm wide, obtuse or aciculate; septa present; transversally septate, 1-5-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; pycnidial; sessile.

Conidiogeneous Cells: Apical. Conidia: Bacilliform.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)

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