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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-28). Data set reviewer(s): Schubert K. (06-03-02); revised.

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

Type Information: Basionym: Uncinula nothofagi Thaxt. Type: Uncinula nothofagi Thaxt.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells conspicuous, ca. 10-30 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [507-508] (1987).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Nothofagus antarctica var. bicrenata Macloskie; Nothofagus, Fagaceae.

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-.105 mm in diam.. Margin: External filaments present (usually shorter than the cleistothecial diam. or about as long as the diam., upper part spirally twisted, ca. 3-8 turns, tips coiled, enlarged); helicoid, .8-1 µm long, 5-8-(10) µm in diameter, hyaline or pigmented (brown from the base to the helicoid part, paler or hyaline towards the tip), few, 5-15 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, smooth or faintly rough, thin or thick (towards the base), not ramified, aseptate or septate (0-1-septate).

Asci: 4-9 asci per ascocarp, not stipitate or indistinctly stipitate, 45-55 µm long, 35-45 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 6-8 per ascus, ellipsoid or ovoid, 18-23 µm long, 10-13 µm wide; septa absent.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Cylindrical; macroconidial, not branched, 25-32 µm long, 10-15 µm wide; aseptate.

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