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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. (06-01-24); revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Microsphaera akebiae Sawada; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera akebiae Sawada. Type: Microsphaera akebiae Sawada.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal to rounded, ca. 10-25 µm diam., colour of the peridium not very dark, asci easily to be seen through the peridium;. Braun U., Beih. Nova Hedwigia 89: 1-700 [400-401] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): China. Country or state(s): Japan and Korea (North & South).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Akebia quinata Decne.; Akebia, Lardizabalaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .08-.11 mm in diam.. Margin: External filaments present; setiform, recurved (tips of the apical branches), 1-1.5-(2) µm long, 8-10 µm in diameter, hyaline or faintly pigmented (at the base), few, 10-18 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, smooth or rough (at the base), thin or thick (towards the base), ramified, dichotomously branched (4-6 times closely and regularly branched, tips recurved), aseptate or septate (0-1-septate).

Asci: 4-8 asci per ascocarp, not stipitate (rarely) or indistinctly stipitate, 40-55 µm long, 30-50 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores (4)-5-7-(8) per ascus, ellipsoid or ovoid, 16-26 µm long, 10-14 µm wide; septa absent.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: More or less cylindrical; macroconidial, not branched, 28-41 µm long, 13-16 µm wide; aseptate.

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