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Data Set Maintenance: Data set compiled and standard item; reviewer(s): Schubert K. (06-03-24); revised.

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

Type Information: Basionym: Microsphaera neomexicana U. Braun. Type: Microsphaera neomexicana U. Braun.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, ca. 10-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [335] (1987).

Biogeography: Northern hemispheric. Continent: Northern America. Country or state(s): Arizona (USA) (only known from the type collection).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Forestiera neomexicana A. Gray; Forestiera, Oleaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, .09-.14 mm in diam.. Margin: External filaments present (radiately spread); sometimes recurved or straight, .75-1.5-(2) µm long, 5-10 µm in diameter, hyaline (stalk), numerous (densely crowded), 10-30 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight (rather), rough, thin or moderatly thick (towards the base), ramified, dichotomously branched (3-6 times, branchings rather irregular, loose, diffuse, deeply cleft, tips mostly straight, obtuse, sometimes recurved), aseptate.

Asci: 6-16 asci per ascocarp, distinctly stipitate, 45-65 µm long, 25-40 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores 3-6 per ascus, ellipsoid or ovoid, 18-24 µm long, 10-14 µm wide; septa absent.

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