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Arthrocladiella mougeotii (Lév.) Vassilkov

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-27). Data set reviewer(s): Schubert K. (06-01-24); revised.

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

Type Information: Basionym: Microsphaera mougeotii Lév.

Taxonomic Literature: Taxonomic notes: +haustoria globoid, ca. 17.5 µm diam.;+appressoria unlobed, nipple-shaped;+conidiophores foot-cells straight, cylindric, followed by 2-3 shorter cells;+ascomata outer wall cells obscure, irregularly polygonal, ca. 8-20(-25) µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [439-440] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Asia-Temperate, Australasia, Europe (all), and Northern America (introduced). Region(s): China (and Central Asia) and New Zealand (introduced). Country or state(s): United Kingdom, Norway, Sweden, Austria, Benelux (Belgium & Luxembourg), former Czechoslovakia (incl. Czech Republic & Slovacia), Germany, Hungary, Netherlands, Poland, Switzerland (incl. Liechtenstein), France (excl. Corsica), Portugal, Bulgaria, Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), Romania, European Turkey, Former Yugoslavia [incl. Bosnia and Herzegovina, Croatia, Macedonia, Moldova, Serbia and Montenegro, Slovenia], Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine; Japan.

Ecology: Biotroph; phytopathogenic; growing on stems, leaves, or inflorescences, amphigenous. Host or Phorophyte Taxonomy: Lycium europaeum; Lycium, Solanaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, (.095)-.11-.165 mm in diam.. Margin: External filaments present; setiform, straight, .5-3 µm long, hyaline or pigmented (at the base), very numerous, up to 100 per mm², growing between the lower and upper hald of the ascocarp (densely crowded around the equatorial zone), flexuose or stiff and straight, smooth or rough, thin, ramified, dichotomously branched (1-5 times, deeply cleft, first branching point near the middle of the stalk or in the lower half, branchings rather diffuse, tips straight; very rarely trichotomously branched) or trichotomously branched, aseptate or septate (occasionally with a single septum at the base).

Asci: 5-30 asci per ascocarp, distinctly stipitate, (35)-50-75 µm long, (15)-20-35-(40) µm wide; dehiscence unitunicate.

Ascospores: 1–2 or c. 4 per ascus, spores 2-3-(4) per ascus, ellipsoid or ovoid, (15)-18-25 µm long, 9-15 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Euoidium-type; branched; basal cells (30)-35-50-(60) µm long, (7.5)-9-11 µm wide. Conidium Formation: Conidiogenous cells in chains. Conidia: Ovoid, doliiform, or cylindrical (oblong-); macroconidial (germ tubes at an end of the spore, rarely arising from a side of the spore, simple, short to long, 4-5 µm wide, terminating in an unlobed appressorium, ca. 5-6 µm wide), not branched, (20)-24-32-(36) µm long, 10-18 µm wide; aseptate.

(report generated 04.Okt.2007)

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