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Erysiphe australis (Speg.) U. Braun & S. Takam. [2007957]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-28). Data set reviewer(s): Schubert K. (06-02-28); revised.

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

Type Information: Basionym: Uncinula australis Speg. Type: Uncinula australis Speg.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, ca. 5-22 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [511] (1987).

Biogeography: Continent: Southern America (Brazil). Country or state(s): Paraguay.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Eugenia sp.; Eugenia, Myrtaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, in loose groups, .1-.17 mm in diam.. Margin: External filaments present (width equal throughout or often increasing from the base to the middle of the stalk, expanded to a width of ca. 6-8 µm, but then narrowing towards the tip); circinate or sub-helicoid (closely or loosely), 1-1.2 µm long, 4-6.5-(8) µm in diameter, hyaline, numerous, 20-45 per mm², growing between the lower and upper hald of the ascocarp (or subequatorial), flexuose, verrucose (at least in the upper half), thin or thick (towards the base), not ramified, aseptate.

Asci: 6-10 asci per ascocarp, indistinctly stipitate, 50-70 µm long, 30-45 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 8 per ascus, ellipsoid or ovoid, 20-24 µm long, 11-13 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Macroconidial, not branched, 28-32 µm long, 12-14 µm wide; aseptate.

(report generated 04.Okt.2007)

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