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Erysiphe alangii (T. Xu) U. Braun & S. Takam. [2019911]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-31). Data set reviewer(s): Schubert K. (06-02-28); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Uncinula alangii T. Xu; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Uncinula alangii T. Xu. Type: Uncinula alangii T. Xu.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, ca. 8-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [529] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): China (only known from the type collection).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Alangium platanifolium (Siebold & Zucc.) Harms; Alangium, Alangiaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, gregarious, .09-.117-(.13) mm in diam.. Margin: External filaments present (straight to curved, 100-150(-170) µm long, oil drops present; apex hardly enlarged); uncinate, circinate, or slightly helicoid (sometimes; close to somewhat looser), 1-1.5 µm long, 6.6-7.5-(8.2) µm in diameter, hyaline, numerous, 16-26 per mm², growing more or less all across the lower half of the ascocarp or between the lower and upper hald of the ascocarp, sub-geniculate (bent) (rarely, or subundulate), smooth or verrucose (below), thin or moderatly thick (below), not ramified, aseptate.

Asci: 4-6 asci per ascocarp, not stipitate or indistinctly stipitate, 50-67 µm long, 30-39 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores (4)-5-6 per ascus, 23-27 µm long, 13-16.5 µm wide; septa absent; wall pale brown (faintly yellowish).

(report generated 04.Okt.2007)

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