Podosphaera spiralis Miyabe [2026978]

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. Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Podosphaera spiralis Miyabe, in Ideta.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells 9.6-16.8 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [160] (1987).

Biogeography: Northern hemispheric. Continent: Asia-Temperate. Country or state(s): Japan (endemic).

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous. Host or Phorophyte Taxonomy: Ulmus propinqua Koidz.; Ulmus, Ulmaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, in loose groups or gregarious, .084-.105 mm in diam.. Margin: External filaments present (fasciculate); not interlaced, recurved (tips of the ultimate branchlets broad, recurved or knob-like), pigmented (throughout, dark brown, or hyaline in the upper half), few (fasciculate), 2-8 per mm², growing on the upper half of the ascocarp, ramified, dichotomously branched (2-3(-4) times), aseptate or septate ((0-)2-3-septate).

Asci: 1 asci per ascocarp, indistinctly stipitate, 70-100 µm long, 55-80 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 7-8 per ascus, ovoid (to oblong), 21-26.5 µm long, 14.5-17 µm wide; septa absent.

(report generated 04.Okt.2007)