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Data Set Maintenance: Data set compiled and standard item; reviewer(s): Schubert K. (06-01-24); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Microsphaera acaciae (S. Blumer) U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells obscure, polygonal, rounded or irregular, small, ca. 8-15 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [310-311] (1987).

Ecology: Biotroph; phytopathogenic; growing on fruits. Host or Phorophyte Taxonomy: Acacia catechu Willd.; Acacia, Leguminosae-Papilionoideae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, gregarious, .135-.23 mm in diam.. Margin: External filaments present (fragile, up to 550 µm in length); somewhat recurved (tips of the apical branches, often broken off) or straight, 1-2.5 µm long, 3-6 µm in diameter, hyaline, very numerous, 20-80 per mm², growing all across the lower half of the ascocarp or between the lower and upper hald of the ascocarp, flexuose (sometimes) or stiff and straight (rather), thin or moderatly thick (occasionally), not ramified or ramified, dichotomously branched (1-2 times, tips straight or somewhat recurved, tips often broken off), aseptate.

Asci: 10-20 asci per ascocarp, distinctly stipitate, 50-95 µm long, 25-50 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 8 per ascus, ellipsoid or ovoid, 18-26 µm long, 11-17 µm wide; septa absent.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid (sometimes) or cylindrical; macroconidial, not branched, 28-40 µm long, 14-18 µm wide; aseptate.

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