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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Schubert K. @EXCL@ Kainz C. (06-02-28).

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: variety. Synonyms: Uncinula actinidiae var. argutae Y. Nomura; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Uncinula actinidiae var. argutae Y. Nomura. Type: Uncinula actinidiae var. argutae Y. Nomura.

Taxonomic Literature: Taxonomic notes: + conidiophoris 1-2-septata, interdum ad basim constricta et prope basim leviter inflata; cleistothecia: cellulae parietis exterioris irregulariter angulatae, 12,5-20 × 10-15 µm diam. Nomura Y., Taxonomical studies of Erysiphaceae of Japan: 82-84. Tokyo (1997).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Actinidia arguta; Actinidia, Actinidiaceae.

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-.15 mm in diam.. Margin: External filaments present; helicoid or straight, 150-500-(750) µm long, 3.2-3.3 µm in diameter, pigmented (brunneae vel atro-brunneae, interdum apicem versus 1/3-1/4 sub-brunneae vel hyalinae), numerous, 16-30 per mm², growing between the lower and upper hald of the ascocarp, flexuose (irregulariter curvatae), thin, ramified (2-3 times), dichotomously branched (prope apicem), septate (0-6-septatae).

Asci: 4-8 asci per ascocarp, globose (obovoid), not stipitate or indistinctly stipitate, 55-63 µm long, 37-50 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 4-8 per ascus, ellipsoid, 15-23 µm long, 7-15 µm wide; septa absent.

Conidiophores: Pseudoidium-type; not branched; conidiophore cells 45-80 µm long, basal cells 7-10 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid; macroconidial, not branched, 30-50 µm long, 15-20 µm wide; aseptate.

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