Skyttella D. Hawksw. & R. Sant. (1988)

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: 1. Skyttella. Genus of unknown placement (incertae sedis); Leotiales.

Type Information: Type: Skytella mulleri (Willey) D. Hawksw. & R. Sant.

Taxonomic Literature: Hawksworth D.L. & Santesson R., Graphis Scripta 2: 33-37 (1988); Rambold G. & Triebel D., Notes Roy. Bot. Gard. Edinburgh 46: 375-389 (1990).

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

Ecology: Biotroph; lichenicolous; terricolous.

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, orbicular, forming all across the thallus surface, soon sessile. Margin: Indistinct; external filaments absent. Periphyses: Absent. Epithecium: Apical cells hyaline or brownish yellow. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White or brownish yellow.

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

Ascospores: c. 8 per ascus, ellipsoid, oblong, or oblong-obtuse, 8.5-14 µm long, 2.5-5 µm wide, obtuse; septa absent; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Present or absent resp. not observed.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)