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Erysiphe densa Berk.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-03-23); revised.

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

Type Information: Basionym: Erysiphe densa Berk.

Taxonomic Literature: Taxonomic notes: +appressoria strongly lobed;+conidiophores foot cells straight or somewhat swollen, followed by 2 slightly shorter cells;+ascocarp outer wall cells polygonal to rounded, ca. 7-23 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [185-186] (1987).

Biogeography: Continent: Australasia. Region(s): New Zealand (endemic).

Ecology: Biotroph; phytopathogenic; growing on stems, leaves, or inflorescences, epiphyllous (mostly) or amphigenous. Host or Phorophyte Taxonomy: Aristotelia sp.; Aristotelia, Elaeocarpaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, in loose groups or gregarious, .95-.13-(.145) mm in diam.. Margin: External filaments present (contorted); mycelioid, straight, .5-3 µm long, 5-6.5 µm in diameter, hyaline or faintly pigmented (yellowish to brownish in the lower half), numerous, growing all across the lower half of the ascocarp, flexuose, moderatly thick, not ramified or ramified (rarely), irregular, septate (few septa, inconspicuous).

Asci: 4-14 asci per ascocarp, distinctly stipitate, 50-80 µm long, 25-45 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 6-8 per ascus, subglobose, ellipsoid, or ovoid, 14-23 µm long, 9-14 µm wide; septa absent.

Conidiomata: Present; hyphomycetous (conidiophores straight or somewhat swollen, followed by too slightly shorter cells).

Conidiophores: Pseudoidium-type; not branched; basal cells 37-42.5 µm long, 7.5-10 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Long cylindrical; macroconidial, not branched, (25)-35-38-(45) µm long, 16-17.5-(19) µm wide; aseptate.

(report generated 04.Okt.2007)

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