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Erysiphe magellanica (Thaxt.) U. Braun & S. Takam. [2027270]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-28). Data set reviewer(s): Schubert K. (06-03-01); revised.

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

Type Information: Basionym: Uncinula magellanica Thaxt. Type: Uncinula magellanica Thaxt.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells polygonal or irregularly shaped, ca. 10-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [491-492] (1987).

Biogeography: Continent: Southern America (Chile, endemic).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Nothofagus antarctica (G. Forst.) Oerst.; Nothofagus, Fagaceae (Nothofagus).

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .09-.17 mm in diam.. Margin: External filaments present; uncinate (mostly loose, curved part somewhat enlarged (up to 10 µm wide)), 1.5-2.5 µm long, 4-7.5 µm in diameter, hyaline, few or numerous, 10-25 per mm², growing between the lower and upper hald of the ascocarp, flexuose (delicate), smooth or rough, thin or moderatly thick (throughout or thin-walled above), not ramified, aseptate or septate (non-septate or with a single septum at the base).

Asci: 10-20 asci per ascocarp, distinctly stipitate (usually), 45-65 µm long, 25-40 µm wide; dehiscence unitunicate.

Ascospores: c. 4 per ascus, spores 3-5 per ascus, ellipsoid or ovoid, 18-24 µm long, 10-14 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Cylindrical; macroconidial, not branched, 30-40 µm long, 15-18 µm wide; aseptate.

(report generated 04.Okt.2007)

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