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Erysiphe umbilici (Kom.) U. Braun & S. Takam.

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

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

Type Information: Basionym: Microsphaera umbilici Kom. Type: Microsphaera umbilici Kom.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells obscure, irregularly polygonal, ca. 8-25(-30) µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [320-321] (1987).

Biogeography: Continent: Asia-Temperate (Central Asia). Region(s): China. Country or state(s): Kazakhstan, Kyrgyzstan, and Tajikistan.

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Umbilicus semenovii Regel & Herder; Umbilicus, Crassulaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .085-.15-(.17) mm in diam.. Margin: External filaments present; straight, 1-1.5 µm long, 8-14 µm in diameter, hyaline or pigmented (between base and septa), growing between the lower and upper hald of the ascocarp, stiff and straight (rather), rough, thin or moderatly thick (towards the base), ramified, dichotomously branched ((2-)3-5(-6) times, branchings fairly regular and close, tips straight, not recurved), aseptate or septate (0-3-septate).

Asci: (4)-8-12-(14) asci per ascocarp, not stipitate or indistinctly stipitate, (40)-50-70 µm long, 25-45 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores (3)-4-5 per ascus, subglobose, ellipsoid, or ovoid, (16)-18-26 µm long, (9)-10-16-(18) µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Cylindrical (slender); macroconidial, not branched, 25-50 µm long, 10-19 µm wide; aseptate.

(report generated 04.Okt.2007)

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