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Erysiphe aspera var. clavulata (R. Y. Zheng & G. Q. Chen) U. Braun & S. Takam. [2008022]

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

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: variety. Synonyms: Uncinula aspera var. clavulata R. Y. Zheng & G. Q. Chen; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Uncinula aspera var. clavulata R. Y. Zheng & G. Q. Chen. Type: Uncinula aspera var. clavulata R. Y. Zheng & G. Q. Chen.

Taxonomic Literature: Taxonomic notes: This variety differs from var. aspera by ascomata characters, see below. Braun U., Beih. Nova Hedwigia 89: 1-700 [509-511] (1987).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous. Host or Phorophyte Taxonomy: Cudrania tricuspidata Bureau ex Lavallée; Cudrania, Moraceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, (.073)-.087-.1-(.115) mm in diam.. Margin: External filaments present (width gradually increasing from base to top; apex mostly enlarged); circinate or sub-helicoid, 1-1.75 µm long, 4.8-7.5-(11.4) µm in diameter, hyaline, few or numerous, (7)-11-13-(27) per mm², growing between the lower and upper hald of the ascocarp, sub-flexuose (or subundulate, rarely geniculate; straight to curved), stiff and straight, or geniculate (bent), verrucose, thin or thick (towards the base), not ramified, aseptate or septate.

Asci: 4-6-(7) asci per ascocarp, not stipitate or indistinctly stipitate, (35.6)-38.1-53.3-(66) µm long, (25.4)-31.5-45.7 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores 4-6 per ascus, ellipsoid, ovoid, pyriform, or reniform, (13.7)-17.8-22.9-(27.9) µm long, (10.5)-12.7-15.2-(16.5) µm wide; septa absent; wall pale brown (faintly yellowish).

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