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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. Currently accepted name Microsphaera phyllanthi Tanda & U. Braun. Synonyms: Microsphaera phyllanthi Tanda & U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera phyllanthi Tanda & U. Braun. Type: Microsphaera phyllanthi Tanda & U. Braun.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, ca. 7-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [377-378] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Phyllanthus flexuosus Müll.Arg.; Phyllanthus, Euphorbiaceae.

Reproduction Strategy: With sexual (and possible asexual) stages (usually hypophyllous). Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered, (.07)-.075-.09-(.1) mm in diam.. Margin: External filaments present (ca. 100-270 µm long, straight to curved, horizontally spread); circinate (nearly), sub-helicoid, or recurved, 2-4 µm long, 7.5-10.5 µm in diameter, hyaline or pigmented (light brown at the base), few, 4-10 per mm², growing between the lower and upper hald of the ascocarp, somewhat flexuose (rarely), smooth or faintly rough (below), thin or thick (towards the base), ramified, dichotomously branched ((2-)4.5 times, primary and secondary branches nearly uniform in length or primary branches somewhat elongated, often somewhat recurved, tips of the ultimate branchlets distinctly recurved to nearly circinate or subhelicoid), aseptate or septate (0-1-septate).

Asci: (2)-3-(4) asci per ascocarp, not stipitate (rarely) or indistinctly stipitate, 40-50 µm long, 29-36 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores 4-7 per ascus, ellipsoid or ovoid, 16-18 µm long, 9-11 µm wide; septa absent.

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