Phyllactinia aceris H. D. Shin & Y. J. La

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 suffulta f. aceris Jacz.; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Phyllactinia aceris H. D. Shin & Y. J. La. Type: Phyllactinia aceris H. D. Shin & Y. J. La.

Taxonomic Literature: Taxonomic notes: +hyphae substraight to somewhat wavy, occasionally geniculate, 50-100 × 4-7 µm, mostly branching at right angle, with a septum near the branching point; appressoria well-developed, variable in morphology, rod- to hook-shaped, branched to coral-shaped, opposite in pairs or single; ascomata outer wall cells irregularly polygonal, 10-21(-32) µm wide, not distinct; penicillate cells crowded on the upper part of the ascoma, 50-110 µm long, stems cylindrical, irregular in width, 20-42(-48) × 7,5-14(-18) µm, and usually bifurcate or divided into several branches at the upper portion, filaments 15-38 µm, generally similar to stems in lenght, 2-4 µm wide. Shin H. D., Erysiphaceae of Korea. 1-320 [160-163]. Suwon, Korea (2000); Shin H. D. & Lee H. J., Mycotaxon 83: 301-325 (2002).

Biogeography: Continent: Asia-Temperate, Europe (All), and Northern America (Canada, USA). Country or state(s): Japan, Korea (North & South), and Turkey (excl. European Turkey).

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous or rarely epiphyllous. Host or Phorophyte Taxonomy: Acer mandshuricum Maxim.; Acer, Aceraceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid (blackish brown), orbicular (depressed globose), forming independently from the host thallus or mycelium, scattered, (.16)-.2-.244 mm in diam.. Margin: External filaments present; not interlaced, straight (acicular with a bulbose base, 35-50 µm wide at the ball, 10-13 µm wide wide above the ball and gradually narrower upwards), (1)-1.3-1.6 µm long, hyaline (throughout), few, 6-14 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, thick (above the ball and gradually thinner upwards), not ramified, aseptate.

Asci: 12-22 asci per ascocarp, indistinctly stipitate (shortly stalked), 70-88 µm long, 34-42 µm wide; dehiscence unitunicate (olivaceous, moderately thick-walled, but slightly thinner at the upper part).

Ascospores: 1–2 per ascus, spores 2 per ascus, oval, 35-54 µm long, 18-22 µm wide; septa absent; wall olive (olivaceous).

Conidiomata: Present; hyphomycetous.

Conidiophores: Ovulariopsis-type (conidiophores single on a hyphal cell, arising from the upper part of creeping hyphae, position mostly central, followed by 2-3 cells, foot-cells twisted or flexuous at the base, very occasionally straight, with a basal septum at 5-16(-40) µm away from the branching point of the mycelium); not branched; conidiophore cells 160-270 µm long, basal cells 6-8 µm long. Conidium Formation: Conidiogenous cells single. Conidia: Clavate (non-papillate at the apex, sometimes narrowed and papilla-like on the end); macroconidial (sometimes guttulate, producing germ tubes on the central or basal or upper side, germ tubes substraight to somewhat wavy, 3-5 µm wide), not branched, 60-85 µm long, 22-30 µm wide; aseptate; cell wall hyaline (to subhyaline); without distinct fibrosin body fibrosin bodies.

(report generated 04.Okt.2007)