Erysiphe katumotoi (U. Braun) U. Braun & S. Takam.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-26). Data set reviewer(s): Schubert K. (06-01-25); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Microsphaera katumotoi U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera katumotoi U. Braun. Type: Microsphaera katumotoi U. Braun.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, ca. 10-25 µm in diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [393] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Ligustrum obtusifolium Siebold & Zucc.; Ligustrum, Oleaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .085-.12-(.18) mm in diam.. Margin: External filaments present; mycelioid or setiform (intermediary, rather setiform), recurved (primary branches often elongated, more or less horizontally spread, or somewhat recurved, tips of the ultimate branchlets distinctly recurved), 1-2 µm long, 7-10 µm in diameter, hyaline or pigmented (at the base), few or numerous, 4-12 per mm², growing between the lower and upper hald of the ascocarp, somewhat flexuose (often) or stiff and straight (straigth to curved), smooth or verrucose (mostly), thin, moderatly thick, or thick (towards the base, sometimes moderately thick-walled (2) throughout), ramified, dichotomously branched (4-5(-6) times, regularly branched, primary branches often elongated, straight to curved, appendages more or less horizontally spread, or somewhat recurved, tips distinctly recurved, appendages occasionally forked in the lower half or at the base), aseptate or septate (0-1-sepate).

Asci: 4-8 asci per ascocarp, not stipitate or indistinctly stipitate, 50-70 µm long, 35-55 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores (6)-7-8 per ascus, ellipsoid, ovoid, or sub-cylindrical, 18-29 µm long, 10-16 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Cylindrical (oblong); macroconidial, not branched, 40-54 µm long, 12.5-15 µm wide; aseptate.

(report generated 04.Okt.2007)