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Erysiphe ljubarskii var. aduncoides (R. Y. Zheng & G. Q. Chen) U. Braun & S. Takam. [2016759]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-28). Data set reviewer(s): Schubert K. (06-03-01); revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: variety. Synonyms: Uncinula ljubarskii var. aduncoides (R. Y. Zheng & G. Q. Chen) R. Y. Zheng & G. Q. Chen; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Uncinula aduncoides R. Y. Zheng & G. Q. Chen. Type: Uncinula aduncoides R. Y. Zheng & G. Q. Chen.

Taxonomic Literature: Taxonomic notes: This variety differs from var. ljubarskii by ascomata characters, see below. Braun U., Beih. Nova Hedwigia 89: 1-700 [479-481] (1987).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous (mostly) or amphigenous. Host or Phorophyte Taxonomy: Acer trifidum Hook. & Arn.; Acer, Aceraceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .085-.13-(.14) mm in diam.. Margin: External filaments present (the width of the appendages is usually somewhat increasing upwards and especially the apex is mostly enlarged); circinate or sub-helicoid, (1)-1.5-2-(2) µm long, 4.5-8-(11) µm in diameter, hyaline or pigmented (at the very base), numerous, (10)-20-40-(45) per mm², growing between the lower and upper hald of the ascocarp, flexuose (curved, subundulate, rarely straight and stiff), stiff and straight, or sub-geniculate (bent), not ramified, aseptate or septate (with a single septum at the base).

Asci: 5-16 asci per ascocarp, not stipitate or indistinctly stipitate, 40-65 µm long, 25-45 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores (4)-5-6-(7) per ascus, ellipsoid or ovoid, 16-25 µm long, 10-15 µm wide; septa absent.

Conidium Formation: Conidiogenous cells single. Conidia: 22-27 µm long, 12-16-(18) µm wide.

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