Podosphaera myrtillina (C. Schub. : Fr.) Kunze var. myrtillina

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set revised.

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

Type Information: Basionym: Sphaeria myrtillina C. Schub.: Fr. Type: Sphaeria myrtillina C. Schub.: Fr.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells conspicuous, irregularly polygonal, ca. 8-

20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [152-154] (1987); Braun U., The powdery mildews (Erysiphales) of Europe.- 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Asia-Temperate, Europe, and Northern America (Canada, Alaska). Region(s): Siberia and Far Eastern Asia. 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), Bulgaria, Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), Romania, 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, amphigenous. Host or Phorophyte Taxonomy: Ericaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, usually scattered, .07-.09 mm in diam.. Margin: External filaments present; 1.5-6 µm long, 6-13 µm in diameter, hyaline or pigmented (brown in the lower half, pale brown, yellowish or nearly hyaline in the upper part), few, (3)-5-8-(10) per mm², growing between the lower and upper hald of the ascocarp (somewhat) or on the upper half of the ascocarp, flexuose or stiff and straight, smooth (stalk), moderatly thick, ramified, septate (mostly 2-8 septa).

Asci: 1 asci per ascocarp, not stipitate, 60-85 µm long, 50-80 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 8 per ascus, subglobose, ellipsoid, or ovoid, 20-30 µm long, 10-19 µm wide; septa absent; wall thin, remaining hyaline, hyaline, not ornamented.

Conidiomata: Present; hyphomycetous (conidial state poorly developed).

Conidiophores: Oidium-type. Conidia: Macroconidial, not branched, 27-35 µm long, 14-18 µm wide; aseptate.

(report generated 04.Okt.2007)