Erysiphe viburnicola U. Braun & S. Takam. [2000105]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-28). Data set reviewer(s): Schubert K. (06-03-06); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Uncinula viburnii Y. Nomura, Tanda & U. Braun. Type: Uncinula viburnii Y. Nomura, Tanda & U. Braun.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, 10-23 x 6-13 µm;. Braun U., Beih. Nova Hedwigia 89: 1-700 [500-501] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Viburnum dilatatum Thunb.; Viburnum, Caprifoliaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered (generally mixed with the ascocarps of Microsphaera sparsa), .075-.12 mm in diam.. Margin: External filaments present (straight to curved, 80-180 µm long, width somewhat increasing from base to top, apex enlarged, circinate part ca. 20-25 µm wide); uncinate (closely) or circinate, 1-1.5 µm long, 5-7 µm in diameter, hyaline, numerous, 13-30 per mm², growing between the lower and upper hald of the ascocarp, flexuose (rarely), thin or thick (towards the base), not ramified, aseptate.

Asci: 4-6 asci per ascocarp, indistinctly stipitate, 45-57 µm long, 36-40 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 3-5 per ascus, ellipsoid or ovoid, 20-25 µm long, 10-14 µm wide; septa absent.

(report generated 04.Okt.2007)