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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set revised.

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

Taxonomic Literature: Taxonomic notes: +ascoc. outer wall cells irregularly polygonal, ca. 10-25 µm
diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [123-124] (1987).

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

Ecology: Biotroph; phytopathogenic; amphigenous. Host or Phorophyte Taxonomy: Verbenaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, gregarious, (.065)-.07-.08-(.09) mm in diam.. Margin: External filaments present; mycelioid (coarse), 1.5-5.5 µm long, hyaline (or only pale brown), (3)-5-8-(9) per mm², growing all across the lower half of the ascocarp, thin (or somewhat thicker below), not ramified, septate (few, 0-3).

Asci: 1-(2) asci per ascocarp, not stipitate or indistinctly stipitate, 35-60 µm long, 30-50 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 5-7 per ascus, ellipsoid or ovoid, 18-23 µm long, 10-13 µm wide; septa absent; wall thin, remaining hyaline, hyaline, not ornamented.

Conidiophores: Oidium-type; not branched. Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid; macroconidial, not branched, 32-40 µm long, 16-20 µm wide; aseptate; with distintly visible fibrosin body fibrosin bodies.

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