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Cystotheca wrightii Berk. & M. A. Curtis

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-01-24); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Sphaerotheca wrightii (Berk. & M. A. Curtis) Höhn.; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Cystotheca wrightii Berk. & M.A. Curtis. Type: Cystotheca wrightii Berk. & M.A. Curtis.

Taxonomic Literature: Taxonomic notes: + mycelial layer at first pale brown, later turning to dark brown, sometimes nearly black, special aerial hyphae present, curved to usually falcate, fairly short, smooth, aseptate, thickwalled, at first hyaline to yellowish or pale brown, deep brown when mature, 6-16(-20) µm wide;+ ascom. wall composed of two layers which easily seperate from each other, outer cells irregularly polygonal, small, ca. 8-18 µm diam., inner cells regularly polygonal, ca. 8-16 µm diam.;+ascus sessile or with a short stalk;. Braun U., Beih. Nova Hedwigia 89: 1-700 [93] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous. Host or Phorophyte Taxonomy: Quercus cf. stenophylla; Quercus, Fagaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, gregarious, .06-.075 mm in diam.. Margin: External filaments present; mycelioid, straight, hyaline or pigmented, few (rudimentary, very short, sometimes nearly absent), growing all across the lower half of the ascocarp, thin, not ramified, aseptate or septate (occasionally with septa).

Asci: 1 asci per ascocarp, not stipitate or indistinctly stipitate, 60-65-(90) µm long, 45-60-(65) µm wide; dehiscence unitunicate.

Ascospores: Not uniseriate, c. 8 per ascus, spores 6-8 per ascus, ellipsoid, 16-29 µm long, 10-16.5 µm wide, obtuse; septa absent; wall thin, remaining hyaline, hyaline, not ornamented.

Conidiomata: Present; hyphomycetous.

Conidiophores: Euoidium-type; not branched. Conidium Formation: Conidiogenous cells in chains. Conidia: Doliiform; macroconidial, not branched, 25-42 µm long, 15-23 µm wide; aseptate; cell wall hyaline; with distintly visible fibrosin body (624: germ tubes arising from a side, long and narrow) fibrosin bodies.

(report generated 04.Okt.2007)

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