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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-31). Data set reviewer(s): Schubert K. (06-04-04); revised.

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

Type Information: Basionym: Leveillula cylindrospora U. Braun. Type: Leveillula cylindrospora U. Braun.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells obscure, irregularly shaped, ca. 10-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [564-565] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Africa, Asia-Temperate, Europe (southern parts), and Asia-Tropical. Region(s): Siberia and China. Country or state(s): France (excl. Corsica), Portugal, Spain (incl. Andorra & Monaco), Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), Romania, European Turkey, Belarus, and Ukraine; Canary Islands (Spain) (and Israel); Southern Russia; Pakistan (and all Central Asia).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous (well developed). Host or Phorophyte Taxonomy: Eurotia ceratoides (L.) C.A. Mey; Eurotia, Chenopodiaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, in loose groups or gregarious, (.12)-.14-.2-(.22) mm in diam.. Margin: External filaments present (mostly poorly developed, very short); mycelioid, straight, .2 µm long, hyaline, few or numerous, smooth, thin, not ramified or ramified (irregularly branched), irregular, septate.

Asci: Distinctly stipitate, 70-100-(125) µm long, (25)-30-40-(50) µm wide; dehiscence unitunicate (very numerous).

Ascospores: 1–2 per ascus, spores 2 per ascus, ellipsoid or ovoid, (20)-25-40 µm long, 15-24 µm wide; septa absent.

Conidiophores: Oidiopsis-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid (primary as well as secondary conidia, often somewhat irregular, occasionally slightly lanceolate, but not typically pointed and usually not lanceolate) or cylindrical; macroconidial, not branched, (30)-45-56-(75) µm long, (10)-15-21-(24) µm wide; aseptate.

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