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Phyllactinia ailanthi (Golovin & Bunkina) Y. N. Yu & S. J. Han

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Schubert K. @EXCL@ Kainz C. (06-03-07).

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Phyllactinia ailanthi Park, nom. illeg.; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Phyllactinia suffulta f. ailanthi Golovin & Bunkina. Type: Phyllactinia suffulta f. ailanthi Golovin & Bunkina.

Taxonomic Literature: Taxonomic notes: +vegetative hyphae substraight to somewhat wavy, 70-110 µm long, but as short as 45-70 µm when having coral-shaped appressoria, 4-5 µm wide, branching at right or narrow angle, with a septum near the branching point; +appressoria well-developed, irregularly branched or coral-shaped, accasionally nipple- to rod-shaped, single or in sequences; +ascomata outer wall cells polygonal to irregularly rounded, 10-26 µm wide, not distinct; + ascomatal penicillate cells crowded on the upper part of the ascoma, 60-120 µm long, stems cylindrical, irregular in width, (25-)36-64 × (7,5-)10-15(-20) µm, divided into 2-8 branchlets in the upper part, occasionally neither branched nor bifurcate at the base, filaments 15-45 µm, generally shorter than the foots, 2-4 µm wide. Shin H. D., Erysiphaceae of Korea. 1-320 [163]. Suwon, Korea (2000); Shin H. D. & Lee H. J., Mycotaxon 83: 301-325 (2002).

Biogeography: Continent: Asia-Temperate. Region(s): China. Country or state(s): Korea (North & South).

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous. Host or Phorophyte Taxonomy: Ailanthus, Simaroubaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid (blackish brown), orbicular (depressed globose), forming independently from the host thallus or mycelium, sub-scattered or gregarious, .18-.25 mm in diam.. Margin: External filaments present; not interlaced, straight (acicular with a bulbose base, 26-42(-52) µm wide at the ball, 9-12 µm wide above the ball and gradually narrower upwards, apex 4-5 µm wide and obtuse), (.8)-1-1.5-(1.8) µm long, hyaline (throughout), few or numerous, 8-18-(22) per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, thick (at the base and gradually thinner upwards), not ramified or sometimes ramified (bifurcate or irregularly), irregular, aseptate.

Asci: 8-20 asci per ascocarp, indistinctly stipitate (shortly stalked, sometimes stalks bifurcate or long) or distinctly stipitate, 64-90 µm long, 28-40 µm wide; dehiscence unitunicate (olivaceous-brown, moderately thick-walled, but slightly thinner at the upper part).

Ascospores: 1–2 or c. 4 (very rarely 3) per ascus, spores 2-(3) per ascus, oval, 30-45 µm long, 16-25 µm wide; septa absent; wall olive (olivaceous-brown).

Conidiomata: Present; hyphomycetous.

Conidiophores: Ovulariopsis-type (conidiophores single on a hyphal cell, arising from the upper part of creeping hyphae, position mostly central, very long, straight in foot-cells, followed by 2-3 straight cells, with a basal septum at 5-15(-20) µm away from the branching point of the mycelium); not branched; conidiophore cells up to 250 µm long, basal cells 5-7 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Clavate (papillate at the apex); macroconidial (germ tubes on the side (apical, median, basal, or even basal end), very long, up to 750 µm long, ca. 4 µm wide), not branched, 65-100 µm long, 23-36 µm wide; aseptate; cell wall hyaline or pigmented (pale olivaceous to subhyaline); without distinct fibrosin body fibrosin bodies.

(report generated 04.Okt.2007)

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