Sawadaea aesculi R. Y. Zheng & G. Q. Chen

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-27). Data set reviewer(s): Schubert K. (06-04-05); revised.

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

Type Information: Basionym: Sawadaea aesculi R. Y. Zheng & G. Q. Chen. Type: Sawadaea aesculi R. Y. Zheng & G. Q. Chen.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, ca. 6-19 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [446-447] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous. Host or Phorophyte Taxonomy: Aesculus wilsonii Rehder; Aesculus, Hippocastanaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .12-.18 mm in diam.. Margin: External filaments present (ca. 35-80 µm long, branchlets narrowed upwards, ca. 5.1-6.5 µm wide above); uncinate, circinate (close), or sub-helicoid, .25-.7 µm long, 7.6-10.2 µm in diameter, hyaline or faintly pigmented (yellowish), numerous, 17-37 per mm², growing on the upper half of the ascocarp, stiff and straight or geniculate (bent) (rarely; straight to undulate), smooth or rough, thick (throughout, mostly coalescent), not ramified or ramified, dichotomously branched (1-2 times, deeply cleft, branched from the middle of the stalk upwards, simple and branched appendages mixed), septate.

Asci: 6-13 asci per ascocarp, not stipitate or indistinctly stipitate (shortly stalked), 58-80 µm long, 35.5-50 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 6-8 per ascus, more or less ovoid, 20-23 µm long, 11.5-13.5 µm wide; septa absent.

(report generated 04.Okt.2007)