Golovinomyces pseudosepultus (U. Braun) V. P. Gelyuta

Data Set Maintenance: Data set compiled and standard item; reviewer(s): Schubert K. (06-03-29); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Erysiphe pseudosepulta U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe pseudosepulta U. Braun. Type: Erysiphe pseudosepulta U. Braun.

Taxonomic Literature: Taxonomic notes: +appressoria nipple-shaped;+ascocarp outer wall cells obscure, irregularly shaped, ca. 8-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [257] (1987).

Biogeography: Northern hemispheric. Continent: Northern America (USA, western part, Calif. to N.M., Wyo., Mont.). Region(s): North-western U.S.A. and South-western U.S.A. Country or state(s): Colarado (USA), Montana (USA), Washington (USA), Wyoming (USA), California (USA), Utah (USA), and New Mexico (USA). Checklist records: United States and Canada (continental).

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Chrysothamnus viscidiflorus Nutt.; Chrysothamnus, Compositae.

Reproduction Strategy: With sexual (and possible asexual) stages (size variable). Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, not emerging (in the dense mycelial layer), scattered (rarely) or gregarious, .085-.175-(.2) mm in diam.. Margin: External filaments present (mostly short, shorter than the cleistothecial diam., often very short, appendages of scattered ascocarps sometimes longer, up to 2 times the cleisthothecial diam.); interlaced with each other or interwoven with surrounding mycelium (differentiation between appendages and mycelium difficult), mycelioid, straight, up to (2) µm long, 3-6.5 µm in diameter, hyaline, numerous, growing all across the lower half of the ascocarp, smooth or rough, thin, not ramified, septate.

Asci: 10-35 asci per ascocarp, distinctly stipitate, (45)-50-75-(90) µm long, (20)-25-35-(40) µm wide; dehiscence unitunicate.

Ascospores: 1–2 to c. 4 per ascus, spores 2-(3) per ascus, subglobose, ellipsoid, or ovoid, 16-32 µm long, 8-16 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Euoidium-type; not branched. Conidium Formation: Conidiogenous cells in chains (short). Conidia: Ovoid, doliiform, or cylindrical; macroconidial, not branched, 20-32 µm long, 10-15 µm wide; aseptate.

(report generated 04.Okt.2007)