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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-26). Data set reviewer(s): Schubert K. (06-03-24); revised.

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

Type Information: Basionym: Microsphaera myoschili Neger. Type: Microsphaera myoschili Neger.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells obscure, irregularly polygonal, ca. 8-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [397-398] (1987).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Myoschilos oblongum Ruiz. & Pav.; Myoschilos, Santalaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .075-.135 mm in diam.. Margin: External filaments present; recurved (when mature), 1-2 µm long, 8-11-(13) µm in diameter, hyaline or faintly pigmented (rarely at the base), few, 3-14 per mm², growing between the lower and upper hald of the ascocarp or somewhat on the upper half of the ascocarp, stiff and straight (to curved), smooth (rarely) or rough, thin or thick (throughout or thin-walled above and thick-walled towards the base, often nearly confluent), ramified, dichotomously branched ((4-)5-7(-8) times, closely and regularly branched, compact, occasionally primary branches somewhat elongated, tips of the ultimate branchlets recurved when mature), aseptate or septate (occasionally with a single septum at the base).

Asci: 4-9 asci per ascocarp, not stipitate or indistinctly stipitate, (40)-45-65 µm long, (25)-30-45 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores (3)-4-5-(6) per ascus, subglobose, ellipsoid, ovoid, or sub-cylindrical (or somewhat irregular, shape variable), 16-26 µm long, 9-15 µm wide; septa absent.

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