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Erysiphe ovidiae (Havryl.) U. Braun & S. Takam.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Schubert K. @EXCL@ Kainz C. (06-01-30).

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

Type Information: Basionym: Microsphaera ovidiae Havryl. Type: Microsphaera ovidiae Havryl.

Taxonomic Literature: Taxonomic notes: + vegetative hyphae branched, ca. 6 µm diam.; peridium with polygonal cells, 10-20 µm diam.; appressoria lobed. Havrylenko M., Mycotaxon 49: 257-267 (1993).

Biogeography: Continent: Southern America (Argentina, Prov. Río Negro).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Ovidia andina Meisn.; Ovidia, Thymelaeaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, (.088)-.099-.126 mm in diam.. Margin: External filaments present; setiform, recurved (primary branches sometimes elongated, tips recurved, but frequently the distal ones extended), 2 µm long, 10 µm in diameter, hyaline or pigmented (slightly yellowish at the base), few or numerous, 11-16 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight (to curved), smooth or rough (at the base), thin or thick (at the base, thinner towards the apex), ramified, dichotomously branched (4 to 5 times), septate (1-septate).

Asci: 3-5 asci per ascocarp, indistinctly stipitate, (48)-50-60 µm long, 34-42 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 4-5-6 per ascus, ellipsoid or ovoid, 20-24 µm long, 14-18 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type. Conidium Formation: Conidiogenous cells single. Conidia: Cylindrical; macroconidial (germinating spontaneously on leaves, forming a simple, subapical tube), not branched, 28-32 µm long, 14-18 µm wide; aseptate.

(report generated 04.Okt.2007)

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