Golovinomyces americanus (U. Braun) V. P. Gelyuta [2000058]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-02-22); revised.

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

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

Taxonomic Literature: Taxonomic notes: +ascomata outer wall (peridium) dark, cells obcure, irregularly shaped, ca. 6-30 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [260] (1987).

Biogeography: Northern hemispheric. Continent: Northern America (USA). Country or state(s): Wisconsin (USA).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Napaea dioica L.; Napaea, Malvaceae.

Reproduction Strategy: With sexual (and possible asexual) stages (amphigenous, frequently hypophyllous). Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .075-.135 mm in diam.. Margin: External filaments present (densely crowded around the fruit body); interlaced with each other or interwoven with surrounding mycelium, mycelioid, straight, .25-2 µm long, (4.5)-5-8-(10.5) µm in diameter, pigmented (brown when mature), numerous, growing all across the lower half of the ascocarp or on the upper half of the ascocarp, smooth, thin, not ramified, septate.

Asci: 10-15 asci per ascocarp, distinctly stipitate, (45)-50-75-(80) µm long, 25-35-(45) µm wide; dehiscence unitunicate.

Ascospores: 1–2 per ascus, spores 2 per ascus, ellipsoid or ovoid, 18-26 µm long, 11-15 µm wide; septa absent; wall thin.

Conidiomata: Present; hyphomycetous.

Conidiophores: Euoidium-type; not branched. Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid, ovoid, or doliiform; macroconidial, not branched, 25-35 µm long, 15-18 µm wide; aseptate.

(report generated 04.Okt.2007)