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Erysiphe sikkimensis Chona, J. N. Kapoor & H. S. Gill

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-03-27); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe sikkimensis Chona, J. N. Kapoor & H. S. Gill. Type: Erysiphe sikkimensis Chona, J. N. Kapoor & H. S. Gill.

Taxonomic Literature: Taxonomic notes: +appressoria multilobed;+ascocarp outer wall cells obscure, irregularly polygonal, ca. 6-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [224-225] (1987).

Biogeography: Continent: Asia-Temperate and Asia-Tropical. Region(s): China (southwestern parts). Country or state(s): Bhutan (Bhutan) & Sikkim (India).

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous (mostly) or amphigenous. Host or Phorophyte Taxonomy: Castanopsis tribuloides A. DC.; Castanopsis, Fagaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, (.06)-.085-.095 mm in diam.. Margin: External filaments present (often very poorly developed, sometimes nearly absent); mycelioid (coral-like), straight, .1-.5 µm long, (3)-4-6.5-(7.5) µm in diameter, hyaline or pigmented (yellowish), few or numerous, (0)-5-20-(40) per mm², growing all across the lower half of the ascocarp or more or less between the lower and upper hald of the ascocarp, verrucose (throughout), thin or moderatly thick, not ramified or ramified (coral-like), not branched (or irregularly branched) or irregular, aseptate.

Asci: 2-4 asci per ascocarp, not stipitate (usually), 40-60 µm long, 30-45-(50) µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores (3)-4-7-(8) per ascus, subglobose, ellipsoid, or ovoid, 16-25 µm long, 11-15 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or doliiform; macroconidial, not branched, 25-40 µm long, 14-18 µm wide; aseptate.

(report generated 04.Okt.2007)

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