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Erysiphe corylicola U. Braun & S. Takam.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-26). Data set reviewer(s): Schubert K. (06-03-23); revised.

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

Type Information: Basionym: Microsphaera coryli Homma. Type: Microsphaera coryli Homma.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells obscure, ca. 10-15 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [371-372] (1987).

Biogeography: Continent: Asia-Temperate. Country or state(s): Japan (northern parts).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Corylus mandshurica Maxim. ex Rupr.; Corylus, Corylaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, .095-.14 mm in diam.. Margin: External filaments present (horizontally spread); recurved or straight, (1)-1.5-2.5 µm long, 6-10 µm in diameter, pigmented (brown from the middle downward, colour sometimes reaching the upper half, paler or yellowish), few or numerous, 5-15 per mm², growing more or less between the lower and upper hald of the ascocarp, flexuose (often angulary bent or somewhat) or geniculate (bent), thin (throughout or slightly thicker towards the base) or moderatly thick, ramified, dichotomously branched (3-5 times, branchings loose and irregular, primary branches often elongate, some branches however, close and regular, tips of the ultimate branchlets straight or recurved), septate (1-5-septate).

Asci: 4-6 asci per ascocarp, not stipitate or indistinctly stipitate, 40-55 µm long, 20-40 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 6-8 per ascus, subglobose, ellipsoid, or ovoid, (12.5)-15-20 µm long, 9-14 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid; macroconidial (germ tubes simple or terminating in a lobed appressorium), not branched; aseptate.

(report generated 04.Okt.2007)

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