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Podosphaera negeri U. Braun, Kiehr & Delhey [2000182]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-05-16); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Podosphaera spiralis (Neger) U. Braun, Kiehr & Delhey; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Sphaerotheca spiralis Neger.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells conspicuous, irregularly shaped, ca. 8-32 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [116-117] (1987).

Biogeography: Continent: Southern America. Country or state(s): Southern Argentina (Argentina) (Patagonia).

Ecology: Biotroph; phytopathogenic; growing on stems (above all) or leaves. Host or Phorophyte Taxonomy: Escallonia rubra (Ruiz & Pavón) Pers.; Escallonia, Escalloniaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, gregarious, .07-.095 mm in diam.. Margin: External filaments present (characteristically undulate to spirally twisted); interlaced with each other, straight, .5-5 µm long, (3)-4-8-(10.5) µm in diameter, hyaline (rarely coloured, only at the very base), few or numerous, growing all across the lower half of the ascocarp, flexuose (characteristically undulate to spirally twisted), smooth or somewhat rough, thin, mostly moderatly thick, or thick, ramified, not branched, septate (few inconspicuous septa).

Asci: 1 asci per ascocarp, sub-globose (mostly), not stipitate, 65-80 µm long, 60-70 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 6-8 per ascus, ellipsoid, ovoid, or somewhat irregular, 18-28 µm long, 10-15.5 µm wide; septa absent.

Conidiophores: Oidium-type.

(report generated 04.Okt.2007)

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