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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-08-01). Data set reviewer(s): Schubert K. (06-07-24); revised.

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

Type Information: Basionym: Oidium arachidis Chorin. Type: Oidium arachidis Chorin.

Taxonomic Literature: Taxonomic notes: +mycelial cells ca. 17-35 x 5-7 µm; +conidiophores erect, 2-3-celled, 12-28 x 6-9 µm, followed by 1-2 shorter cells;. Braun U., Beih. Nova Hedwigia 89: 1-700 [599] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Asia-Temperate (Israel, Armenia) and Europe. Region(s): Caucasus. Country or state(s): Greece and European Turkey.

Ecology: Biotroph; phytopathogenic; growing on leaves. Host or Phorophyte Taxonomy: Arachis hypogea L.; Arachis, Leguminosae-Papilionoideae.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid, ovoid, or cylindrical; macroconidial, not branched, 24-40 µm long, (11)-13-18 µm wide; aseptate.

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