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Erysiphe stephaniae Tanda & T. Fukuda, in Tanda

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Schubert K. @EXCL@ Kainz C. (06-01-30).

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

Type Information: Basionym: Erysiphe stephaniae Tanda & T. Fukuda. Type: Erysiphe stephaniae Tanda & T. Fukuda.

Taxonomic Literature: Taxonomic notes: + conidiophores erect, 1-3-septate, straight or curved, foot cells cylindrical, straight or often geniculate near the base; ascomata wall cells irregularly polygonal, 14-25 × 11-18 µm. Tanda S., Mycoscience 35: 49-52 (1994).

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

Ecology: Biotroph; phytopathogenic; growing on leaves, usually epiphyllous or amphigenous. Host or Phorophyte Taxonomy: Stephania cephalantha Hayata; Stephania, Menispermaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular (depressed globose or subglobose), forming independently from the host thallus or mycelium, often scattered or gregarious, (.082)-.089-.11-(.125) mm in diam.. Margin: External filaments present; mycelioid or setiform (intermediary), straight, 196-445 µm long, 5.2-7.7 µm in diameter, pigmented (brown to dark brown throughout or from the middle downward), numerous, 8-20 per mm², growing all across the lower half of the ascocarp, flexuose or stiff and straight (curved, flexuous or rarely straight), not ramified, aseptate or septate (usually 1-3-septate, rarely aseptate).

Asci: 4-5 asci per ascocarp, globose (ovate or subglobose), not stipitate or indistinctly stipitate, 43-75 µm long, 32-46-(53) µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores 4-7 per ascus, ellipsoid or ovoid, 19-36 µm long, 11-17 µm wide; septa absent; wall pale brown (light yellow).

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched; basal cells 40-75 µm long, 7-9 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or ovoid; macroconidial (vacuolate), not branched, 34-54 µm long, 17-26 µm wide; aseptate.

(report generated 04.Okt.2007)

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