Podosphaera cercidiphylli Tanda & Y. Nomura

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-01-26); revised.

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

Type Information: Basionym: Podosphaera cercidiphylli Tanda & Y. Nomura. Type: Podosphaera cercidiphylli Tanda & Y. Nomura.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells obscure, irregularly polygonal to rounded, ca. 10-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [154] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on leaves, mostly hypophyllous or amphigenous (infections very inconspicuous). Host or Phorophyte Taxonomy: Cercidiphyllum japonicum Siebold & Zucc.; Cercidiphyllum, Cercidiphyllaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered (hypophyllous), .06-.075 mm in diam.. Margin: External filaments present (fairly straight, length variable, also on the same fruit body; appendages width: often somewhat enlarged at the very base); setiform, recurved (primary branches horizontally spread, occasionally somewhat recurved, tips of the ultimate branchlets distinctly recurved when mature), (1)-1.5-2.5-(3) µm long, 6-8 µm in diameter, hyaline or pigmented (stalk coloured (ca. 1/2-4/5), brown, somewhat paler upwards, apex hyaline), few, 4-10 per mm², growing between the lower and upper hald of the ascocarp or somewhat on the upper half of the ascocarp, stiff and straight, smooth, thin, moderatly thick, or thick (thick-walled throughout or thin above and thick below), ramified, dichotomously branched (2-5 times regularly branched, relatively close), septate (2-6-septate).

Asci: 1 asci per ascocarp, sub-globose or broadly clavate, not stipitate, 50-60 µm long, 45-50 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 8 per ascus, subglobose, ellipsoid, or ovoid, (13)-14-20 µm long, 11-13-(18) µm wide; septa absent; wall remaining hyaline.

Conidiomata: Absent resp. not observed.

(report generated 04.Okt.2007)