Erysiphe jatrophae Doidge

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-03-23); revised.

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

Type Information: Basionym: Erysiphe jatrophae Doidge. Type: Erysiphe jatrophae Doidge.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells obscure, irregularly polygonal, rather large, 10-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [212] (1987).

Biogeography: Continent: Africa (South Africa, endemic).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Jatropha zeyheri Sond.; Jatropha, Euphorbiaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .075-.105 mm in diam.. Margin: External filaments present (very short, length not more than half the diam. of the ascocarp); mycelioid, straight, up to.5 µm long, 3.5-8 µm in diameter, hyaline, few or numerous, growing all across the lower half of the ascocarp, smooth or somewhat rough, thin, not ramified, septate.

Asci: 2-4 asci per ascocarp, not stipitate or rarely indistinctly stipitate, 35-60 µm long, (25)-30-40-(45) µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores 4-6 per ascus, ellipsoid or ovoid, 18-22.5 µm long, 9-14.5 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or cylindrical; macroconidial, not branched, 30-40 µm long, 15-20 µm wide; aseptate.

(report generated 04.Okt.2007)