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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. (06-02-28); revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Uncinula curvispora (Hara) Hara; Erysiphe curvispora (Hara) U. Braun & S. Takam.; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Uncinula septata var. curvispora Hara. Type: Uncinula septata var. curvispora Hara.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells obscure, irregularly polygonal, ca. 6-15 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [464-465] (1987).

Biogeography: Continent: Asia-Temperate. Country or state(s): Japan (endemic).

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous (mostly) or amphigenous. Host or Phorophyte Taxonomy: Fagus japonica Maxim.; Fagus, Fagaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered, .15-.205 mm in diam.. Margin: External filaments present (shorter than the cleistothecial diam., width decreasing from the base to top); uncinate (closely), circinate, or sub-helicoid, 4-6.5 µm in diameter, hyaline or pigmented (in the lower part, yellowish to light brown), very numerous, 100-250 per mm², growing on the upper half of the ascocarp (densely crowded), flexuose (straight to curved), smooth, thin, not ramified, septate (ca. 3-8 septa, not reaching the circinate part of the appendages, often only 2/3 of the stalk with septa).

Asci: 8-15 asci per ascocarp, not stipitate or indistinctly stipitate (shortly stalked), 45-65 µm long, 25-40 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 8 per ascus, curved, 28-35 µm long, 12-15 µm wide; septa absent; wall pale brown.

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