Podosphaera fugax (Penz. & Sacc.) U. Braun & S. Takam.

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

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Sphaerotheca fugax Penz. & Sacc.; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Sphaerotheca fugax Penz. & Sacc.

Taxonomic Literature: Taxonomic notes: +conidia germ tubes short to moderately long, formed on a

side;
+conidiophores erect, foot-cells cylindric or slightly

increasing from base to top, basal septum often somewhat away from

the branching point of the mycelium, foot-cells followed by 1-4

shorter cells;
+appressoria indistinct;
+ascocarp outer wall
cells
irregularly shaped, 10-25(-30) µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [114-115] (1987).

Biogeography: Continent: Africa, Asia-Temperate, Europe, and Northern America (USA, Canada). Region(s): Siberia, Far Eastern Asia, and China. Country or state(s): Canary Islands (Spain); Lebanon-Syria (and Israel) and Japan.

Ecology: Biotroph; phytopathogenic; growing on stems or leaves. Host or Phorophyte Taxonomy: Geraniaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered (on leaves; densely aggregated at stems) or gregarious, (.07)-.08-.1-(.11) mm in diam.. Margin: External filaments present; interwoven with surrounding mycelium, setiform, 1-5 µm long, 4-8 µm in diameter, hyaline (later turning to brown, often paler upwards) or pigmented, growing all across the lower half of the ascocarp, flexuose, smooth, thin, not ramified, not branched, septate.

Asci: 1 asci per ascocarp, 70-100 µm long, 50-75 µm wide; dehiscence unitunicate.

Ascospores: Not uniseriate, c. 8 per ascus, spores 6-8 per ascus, ellipsoid or ovoid, 16-24 µm long, 12-18 µm wide; septa absent; wall hyaline.

Conidiomata: Present; hyphomycetous.

Conidiophores: Oidium-type; not branched; basal cells 65-130 µm long, 9-14 µm wide. Conidium Formation: Conidiogenous cells in chains. Conidia: Nearly subglobose (rarely), ellipsoid, or ovoid; macroconidial, not branched, rounded at both ends, 20-35 µm long, 16-24 µm wide; aseptate; cell wall hyaline; with distintly visible fibrosin body fibrosin bodies.

(report generated 04.Okt.2007)