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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-26). Data set reviewer(s): Schubert K. (06-03-24); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Microsphaera meliosmae Tanda & Y. Nomura; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera meliosmae Tanda & Y. Nomura. Type: Microsphaera meliosmae Tanda & Y. Nomura.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, ca. 14-25 x 11-14 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [374] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Meliosma myriantha Siebold & Zucc.; Meliosma, Sabiaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, gregarious, (.071)-.078-.107 mm in diam.. Margin: External filaments present ((85-)93-139 µm long); recurved (tips of the ultimate branchlets), 1-1.25 µm long, 8-11 µm in diameter, hyaline or pigmented (in the lower part, brown, paler to hyaline in the upper half), few, 6-12 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, thin or moderatly thick (especially in the lower half), ramified, dichotomously branched (3-5 times, regularly and closely, primary branches often somewhat elongated, tips of the ultimate branchlets recurved), septate (2-4-septate).

Asci: 2-5 asci per ascocarp, indistinctly stipitate, (39)-46-53-(61) µm long, 39-46-(50) µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 6 per ascus, ellipsoid or ovoid, 22-28 µm long, 11-17 µm wide; septa absent.

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