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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-27). Data set reviewer(s): Schubert K. (06-03-22); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Microsphaera blasti F. L. Tai; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera blasti F. L. Tai. Type: Microsphaera blasti F. L. Tai.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, 7-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [435-436] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Lindera megaphylla Hemsl.; Lindera, Lauraceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .07-.12 mm in diam.. Margin: External filaments present; recurved (when mature), 1-2-(2.5) µm long, 7-11-(15) µm in diameter, hyaline or pigmented (between base and septum, sometimes coloured from the middle of the stalk downward), numerous, (2)-6-15-(22) per mm², growing between the lower and upper hald of the ascocarp, stiff and straight (straight to curved), smooth or rough, thin or thick (throughout or thin-walled above and thick-walled towards the base), ramified, dichotomously branched (3-5 times, regularly, branchings close and loose (primary and secondary branches sometimes elongated)), aseptate or septate ((0-)1(-3)-septate).

Asci: 3-6 asci per ascocarp, not stipitate or indistinctly stipitate, 40-65-(70) µm long, 25-50 µm wide; dehiscence unitunicate.

Ascospores: 1–2 to c. 8 per ascus, spores (2)-3-5-(6) per ascus, ellipsoid (or oblong, size variable) or ovoid, 15-30 µm long, 9-14-(18) µm wide; septa absent.

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