Golovinomyces brunneopunctatus (U. Braun) V. P. Gelyuta [2000312]

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. Synonyms: Erysiphe brunneopunctata U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

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

Taxonomic Literature: Taxonomic notes: Persistent secondary mycelium brown, hyphae rather coarse, ca. 5-10.5 µm wide, branched, septate, thin-walled, sometimes moderately thick-walled, separation between hyphae and appendages hardly possible, appendages and secondary mycelium forming a brown felt around the groups of ascocarps, conidia and conidiophores sometimes included in the formation of the secondary mycelium (such conidia and conidiophores are also coloured).+ascocarp outer wall cells irregularly polygonal, rather conspicuous and thick-walled, ca. 10-25(-30) µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [262] (1987).

Biogeography: Northern hemispheric. Continent: Northern America (USA). Country or state(s): Pennsylvania (USA), California (USA), and Utah (USA).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Mimulus guttatus DC.; Mimulus, Scrophulariaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups (the leaves of the hosts appear dotted by small brown spots of ascocarps and secondary mycelium), .09-.135 mm in diam.. Margin: External filaments present; interlaced with each other or interwoven with surrounding mycelium, mycelioid, straight, .5-2.5 µm long, (5)-6-10-(14.5) µm in diameter, pigmented (brown throughout 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: 8-15 asci per ascocarp, distinctly stipitate, (50)-60-80-(95) µm long, 25-40 µm wide; dehiscence unitunicate.

Ascospores: 1–2 to c. 4 per ascus, spores 2-4 per ascus, ellipsoid, ovoid, or sub-cylindrical, 18-32 µm long, 11-18 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Euoidium-type; not branched. Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid or doliiform; macroconidial (germ tubes at an end, moderately long, apex somewhat enlarged), not branched, 28-38 µm long, 13.5-19 µm wide; aseptate.

(report generated 04.Okt.2007)