Phyllactinia guttata (Wallr. : Fr.) Lév.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-08-02). Data set reviewer(s): Schubert K. (06-01-26); revised.

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

Type Information: Basionym: Alphitomorpha guttata Wallr. Type: Alphitomorpha guttata Wallr.

Taxonomic Literature: Taxonomic notes: +appressoria unlobed, nipple-shaped, hool-shaped, occasionally branched to moderately lobed, 5-12 µm wide, single or frequently opposite in pairs;+conidiophores foot-cells basal septum often somewhat away from the branching point of the mycelium, following cells mostly shorter;+ascomata outer wall cells obscure, irregularly polygonal, ca. 6-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [462] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Cosmopolitan. Country or state(s): Denmark, Finland, United Kingdom, Norway, Sweden, Austria, Benelux (Belgium & Luxembourg), former Czechoslovakia (incl. Czech Republic & Slovacia), Germany, Hungary, Netherlands, Poland, Switzerland (incl. Liechtenstein), France (excl. Corsica), Portugal, Spain (incl. Andorra & Monaco), Bulgaria, Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), Romania, European Turkey, Former Yugoslavia [incl. Bosnia and Herzegovina, Croatia, Macedonia, Moldova, Serbia and Montenegro, Slovenia], Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine.

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous (mostly) or amphigenous. Host or Phorophyte Taxonomy: Corylus avellana L.; Corylus, Aceraceae, Actinidiaceae, Alangiaceae, Anacardiaceae, Aquifoliaceae, Araliaceae, Asclepiadaceae, Berberidaceae, Betulaceae, Bignoniaceae, Bombacaceae, Buxaceae, Calycanthaceae, Caprifoliaceae, Caricaceae, Celastraceae, Combretaceae, Cornaceae, Corylaceae, Ebenaceae, Ericaceae, Euphorbiaceae, Eupteleaceae, Fagaceae, Grossulariaceae, Hamamelidaceae, Hippocastanaceae, Hydrangeaceae, Juglandaceae, Labiatae, Lauraceae, Leguminosae-Papilionoideae, Lythraceae, Magnoliaceae, Meliaceae, Moraceae, Platanaceae, Rhamnaceae, Rosaceae, Rutaceae, Salicaceae, Saxifragaceae, Simaroubaceae, Staphyleaceae, Styracaceae, Symplocaceae, Tiliaceae, Ulmaceae, and Vitaceae.

Reproduction Strategy: With sexual (and possible asexual) stages (usually hypophyllous). Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered (mostly) or sometimes in loose groups, .15-.25-(.28) mm in diam.. Margin: External filaments present (acicular, with basal swelling, bulbous base, ca. (20-)25-50(-60) µm in diam.; special apical cells (penicillate cells) simple or moderately branched, mostly about 40-60 µm long, rarely exceeding); mycelioid or setiform (bristle-like, neither mycelioid nor setiform), straight, 1-2.5 µm long, few or numerous, 3-15-(18) per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, not ramified, septate.

Asci: 6-30 asci per ascocarp, broadly clavate, narrowly clavate, or sub-cylindrical, 60-100 µm long, 25-40 µm wide; dehiscence unitunicate (shape variable).

Ascospores: 1–2 or c. 4 per ascus, spores 2-(3) per ascus, ellipsoid or ovoid, 25-45 µm long, 14-25 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Ovulariopsis-type; not branched; basal cells (20)-50-200 µm long. Conidium Formation: Conidiogenous cells single. Conidia: Clavate (or somewhat rhomboid in outline, apex rounded or with a protrusion; fusiform-); macroconidial (germ tubes usually arising from a side of the spore, fairly short, apex with an unlobed appressorium), not branched, 40-90 µm long, (10)-15-25 µm wide; aseptate.

(report generated 04.Okt.2007)