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Erysiphe udaipurensis var. praeterita (Marasas & I. H. Schum.) U. Braun & S. Takam. [2002508]

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

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: variety. Synonyms: Uncinula udaipurensis var. praeterita (Marasas & I. H. Schum.) U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Uncinula praeterita Marasas & I. H. Schum. Type: Uncinula praeterita Marasas & I. H. Schum.

Taxonomic Literature: Taxonomic notes: +appressoria lobed, single or opposite, 6.5-13 x 3-6.5 µm;+ascomata outer wall cells polygonal, ca. 10-15 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [483-485] (1987).

Biogeography: Continent: Africa (South Africa, Pretoria, only known from the type collection).

Ecology: Biotroph; phytopathogenic; growing on leaves. Host or Phorophyte Taxonomy: Ehretia rigida (Thunb.) Druce; Ehretia, Boraginaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .08-.14 mm in diam.. Margin: External filaments present; uncinate, circinate (at first loosely, later closely, apex not enlarged), or helicoid (3), .75-2 µm long, 4.5-9-(11) µm in diameter, hyaline, numerous, 20-80 per mm², growing between the lower and upper hald of the ascocarp or on the upper half of the ascocarp (somewhat from the), flexuose or stiff and straight (and straight to flexuose and curved), smooth or faintly rough, thin or very moderatly thick (at the base, or thin-walled throughout), not ramified, aseptate or septate (with 1(-2) septa, septa often somewhat away from the base).

Asci: 4-7 asci per ascocarp, indistinctly stipitate, 50-60 µm long, 30-35 µm wide; dehiscence unitunicate.

Ascospores: c. 4 per ascus, spores 3 per ascus, ellipsoid or ovoid, 20-30 µm long, 13-16 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: More or less cylindrical; macroconidial, not branched, 30-45 µm long, 12-15 µm wide; aseptate.

(report generated 04.Okt.2007)

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