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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Schubert K. @EXCL@ Kainz C. (06-03-29).

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Phyllactinia ampulliformis Havryl. Type: Phyllactinia ampulliformis Havryl.

Taxonomic Literature: Taxonomic notes: +peridial cells irregularly polygonal, ca 8-18 µm diam., peridium thin, asci and ascospores visible inside the ascocarp; +penicillate cells large, 60-96 µm, branched, branches with distal ampulliform ends; +appressoria nipple-shaped to multi-lobed, opposite; +vegetative hyphae 4-8 µm wide. Havrylenko M., Nova Hedwigia 61: 447-455 (1995).

Ecology: Biotroph; phytopathogenic; growing on leaves, mostly hypophyllous (scarce). Host or Phorophyte Taxonomy: Discaria chacaye (G. Don) Tortosa; Discaria, Rhamnaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered (scarce), .2-.24 mm in diam.. Margin: External filaments present; not interlaced, straight (acicular, bulbous basal swellings ca 48-52 µm diam.), 1-2 µm long, hyaline, few, 7-10 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, smooth, thin, not ramified, aseptate.

Asci: 13-14 asci per ascocarp, clavate or sub-cylindrical, distinctly stipitate, 60-90 µm long, 26-42 µm wide; dehiscence unitunicate.

Ascospores: 1–2 per ascus, spores 2 per ascus, ellipsoid or ovoid, (34)-48-52-(58) µm long, 20-28 µm wide; septa absent.

Conidiophores: Ovulariopsis-type (very delicate and flexible, frequently twisted); not branched; basal cells up to 72 µm long. Conidium Formation: Conidiogenous cells single. Conidia: Clavate (with apiculus); macroconidial (germ tubes simple, arising subapically, as seen in naturally germinated conidia on leaves), not branched, 61-81 µm long, 14-22-(24) µm wide; aseptate.

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