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Golovinomyces biocellatus (Ehrenb.) V. P. Gelyuta

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-01-26); revised.

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

Type Information: Basionym: Erysiphe biocellata Ehrenb. Type: Erysiphe biocellata Ehrenb.

Taxonomic Literature: Taxonomic notes: +appressoria nipple-shaped or slightly lobed, sometimes hardly developed;+conidiophores erect, foot-cells nearly cylindric, followed by 1-3 shorter cells, frequently constricted at the basal septum (ca. 5-10 µm wide), basal septum sometimes somewhat away from the branching point of the mycelium;+ascomata outer wall cells irregularly shaped, size variable, (5-)10-25(-35) µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [244-245] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Africa, Asia-Temperate, Europe, Northern America (USA, Canada), Southern America (introduced), and Asia-Tropical. Region(s): Northern Africa, Southern Africa, Siberia, Far Eastern Asia, Middle Asia (+ Asia minor), and China. Country or state(s): Denmark, Finland, United Kingdom, Sweden, Austria, former Czechoslovakia (incl. Czech Republic & Slovacia), Germany, Hungary, Poland, Switzerland (incl. Liechtenstein), France (excl. Corsica), Portugal, Spain (incl. Andorra & Monaco), Bulgaria, Greece, 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; India.

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Lycopus europaeus L.; Lycopus, Labiatae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, (.07)-.085-.15 mm in diam.. Margin: External filaments present; interlaced with each other or interwoven with surrounding mycelium (often forming a dense felt around the ascocarps), mycelioid, straight, .5-2.5 µm long, 4-9.5 µm in diameter, pigmented (more or less brown when mature), numerous, growing all across the lower half of the ascocarp, smooth or verrucose, thin, not ramified or ramified (rarely), irregular, septate.

Asci: 5-15 asci per ascocarp, distinctly stipitate, (45)-50-80-(95) µm long, 25-45-(50) µm wide; dehiscence unitunicate (the asci are usually filled with oil-drops, even when mature).

Ascospores: 1–2 to c. 8 per ascus, spores 2-3-(4) per ascus, ellipsoid or ovoid, 20-25-(30) µm long, 12-18.5 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Euoidium-type; not branched; basal cells (30)-40-75-(80) µm long, 10-13 µm wide. Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid, ovoid, or doliiform; macroconidial (germ tubes apically or subapically arising, moderately long, ending in an unlobed appressorium), not branched, 25-42 µm long, 14-24 µm wide; aseptate.

(report generated 04.Okt.2007)

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