Brasiliomyces trina (Harkn.) R. Y. Zheng

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

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

Type Information: Basionym: Erysiphe trina Harkn. Type: Erysiphe trina Harkn.

Taxonomic Literature: Taxonomic notes: Anamorph unknown.+ascocarp outer wall cells irregularly polygonal, small and indistinct, ca. 6-14 µm diam., peridium yellowish to light brown, thin, semitransparent, composed of one conspicuous layer;. Braun U., Beih. Nova Hedwigia 89: 1-700 [271-272] (1987).

Biogeography: Continent: Northern America (southern USA, especially California). Country or state(s): Arizona (USA) and California (USA).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous. Host or Phorophyte Taxonomy: Quercus agrifolia; Quercus, Fagaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, in loose groups or gregarious, .05-.07 mm in diam.. Margin: External filaments present (very short and rudimentary, sometimes lacking); mycelioid, straight, .2-.5-(1) µm long, 3-5 µm in diameter, hyaline, few, 1-6 per mm², growing all across the lower half of the ascocarp, smooth or somewhat rough, thin, not ramified or ramified, not branched or irregular, aseptate or septate (few inconspicuous septa).

Asci: 2-3 asci per ascocarp, not stipitate or indistinctly stipitate, 40-50 µm long, 25-40 µm wide; dehiscence unitunicate.

Ascospores: 1–2 per ascus, spores 2 per ascus, ellipsoid, ovoid, or curved (rarely), 25-35-(40) µm long, 13-18 µm wide; septa absent; wall hyaline or pale brown.

Conidiomata: Absent resp. not observed.

(report generated 04.Okt.2007)