Leveillula elaeagni (Jacz.) Simonyan & V. P. Gelyuta

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-01-12).

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Leveillula elaeagnacearum Golovin, nom. nud.; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Leveillula taurica f. elaeagni Jacz.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly shaped, ca. 8-20 µm diam.; +primary conidia broadly lanceolate, ca. 40-60 x 15-22 µm, l/w ratio 2,4-3,1 (average 2.7), maximum with in the lower half of the conidium, narrowed towards the apex, somewhat pointed, base rounded or truncate, often somewhat constricted above the base, secondary conidia l/w ratio ca. 2,4-2,9 (average 2,6). Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337 [206-207]. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Asia-Temperate and Europe. Country or state(s): Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia) and European Turkey; Transcaucasus (Armenia, Azerbaijan & Georgia).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous. Host or Phorophyte Taxonomy: Elaeagnus angustifolius L.; Elaeagnus, Elaeagnaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .155-.21 mm in diam.. Margin: External filaments present (shorter than the cleistothecial diam.); mycelioid, straight, up to 8 µm in diameter, hyaline or pigmented (occasionally brownish at the base), numerous, growing all across the lower half of the ascocarp, smooth, not ramified (irregularly branched), irregular.

Asci: 60-80 µm long, 25-45 µm wide; dehiscence unitunicate (numerous).

Ascospores: 1–2 per ascus, spores 2 per ascus, ellipsoid or ovoid, 29-40 µm long, 16-22 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Oidiopsis-type. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid (secondary conidia) or ovoid; macroconidial (dimorph, primary and secondary conidia), not branched, 38-52 µm long, 14-20 µm wide; aseptate.

(report generated 04.Okt.2007)