Erysiphe securinegae (F. L. Tai & C. T. Wei) U. Braun & S. Takam.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-26). Data set reviewer(s): Schubert K. (06-03-27); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Microsphaera securinegae F. L. Tai & C. T. Wei; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera securinegae F. L. Tai & C. T. Wei. Type: Microsphaera securinegae F. L. Tai & C. T. Wei.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells cylindric or somewhat curved to flexuous, followed by (0-)1-2 shorter cells;+ascomata outer wall cells irregularly polygonal, ca. 10-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [357-358] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): Far Eastern Asia and China. Country or state(s): Japan.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Securinega suffruticosa (Pall.) Rehder; Securinega, Euphorbiaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .06-.095 mm in diam.. Margin: External filaments present; not interlaced (horizontally spread), circinate (sometimes nearly; or subhelicoid), helicoid, or recurved (when mature), (2)-5-10-(13) µm long, 3.5-5.5 µm in diameter, hyaline or pigmented (brown), few or numerous, (4)-5-9-(18) per mm², growing all across the lower half of the ascocarp, flexuose, smooth, thin, not ramified or ramified, dichotomously branched (1-5 times, some appandages simple, branchings irregular, diffuse, or branchings more regular, primary branches often elongated, primary and secondary branches sometimes recurved) or irregular, aseptate.

Asci: 3-5-(7) asci per ascocarp, indistinctly stipitate, 30-55 µm long, 30-45 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores (5)-8 per ascus, ellipsoid, ovoid, or oblong, 10-22.5 µm long, 6-12 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type (conidiophores erect, foot-cells cylindrical or somewhat curved to flexuous, followed by (0-)1-2 shorter cells); not branched; conidiophore cells 42-61 µm long, basal cells 7-11 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ovoid or sub-cylindrical; macroconidial, not branched, 19-36 µm long, 9-17 µm wide; aseptate.

(report generated 04.Okt.2007)