Erysiphe delavayi (Pat.) U. Braun & S. Takam. [2022054]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-31). Data set reviewer(s): Schubert K. (06-03-01); revised.

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

Type Information: Basionym: Uncinula delavayi Pat. Type: Uncinula delavayi Pat.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, ca. 10-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [516] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, hypophyllous. Host or Phorophyte Taxonomy: Ailanthus glandulosa Desf.; Ailanthus, Simaroubaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .09-.135 mm in diam.. Margin: External filaments present (stout, enlarged at the very base, width subequal throughout or somewhat increasing upwards; apex usually not conspicuously enlarged; appendages mostly curved, the entire appendages frequently widely curved or at least the upper half); uncinate (closely) or circinate, .5-1 µm long, 7-9.5 µm in diameter, hyaline or pigmented (rarely at the base), few, 5-12 per mm², growing between the lower and upper hald of the ascocarp, rough, thin or thick (towards the base, often coalescent near the base), not ramified, aseptate.

Asci: (4)-5-8-(12) asci per ascocarp, not stipitate or indistinctly stipitate, 45-65 µm long, 35-50 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores (5)-6-7 per ascus, ellipsoid or ovoid, 16-24 µm long, 10-15 µm wide; septa absent.

(report generated 04.Okt.2007)