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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Schubert K. @EXCL@ Kainz C. (06-03-29).

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

Type Information: Basionym: Oidium fuegianum Havryl. & U. Braun. Type: Oidium fuegianum Havryl. & U. Braun.

Taxonomic Literature: Taxonomic notes: +hyphal appressoria nipple-shaped, scarce; +vegetative hyphae 4-9 µm wide. Havrylenko M. & Braun U., Nova Hedwigia 66: 513-522 (1998).

Biogeography: Continent: Southern America (Argentina, Tierra del Fuego). Country or state(s): Southern Argentina (Argentina).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Ranunculus peduncularis Sm.; Ranunculus, Ranunculaceae.

Conidiophores: Euoidium-type (erect, foot-cells cylindrical, some enlarged in the middle, followed by one or two shorter cells, basal septum distant from the supporting hyphae); not branched; basal cells (23)-31-49-(56) µm long, 9-15 µm wide. Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid or mostly doliiform; macroconidial (germ tubes short, apical), not branched, 28-40 µm long, 15-19 µm wide; aseptate.

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