Purpureofaciens aquatica W. Dong, H. Zhang & K.D.
Index Fungorum number: IF 557902
Saprobic on decaying wood submerged in freshwater. Sexual morph: Ascomata 200–300 μm high, 300–400 μm diam., dark brown to black, scattered or gregarious, semiimmersed to superficial, conical, flattened at the basal region, stain the substrate purple and produce reddish pigmentation at the apex, coriaceous, with a large, protuberant, ostiolate papilla, 110–130 μm long, 110–130 μm wide. Peridium unequal thickness, poorly developed at the base, up to 45 μm at the sides and 15 μm at the base, composed of reddish brown, large cells of textura angularis. Pseudoparaphyses 2 μm diam., numerous, trabeculate, filiform, hyaline, embedded in a hyaline gelatinous matrix. Asci 135–150 × 8.5–11 μm (x̄ = 143 × 9.7 μm, n = 10), 8-spored, bitunicate, cylindrical, pedicellate, apically rounded. Ascospores 15–22 × 7–10 μm (x̄ = 18.5 × 8 μm, n = 20), uniseriate, curved, olivaceous, 1-septate, constricted at the septum, ellipsoidal with acute ends, with two prominent guttules when immature, thin-walled, smooth, surrounded by a thin mucilaginous sheath. Asexual morph: Undetermined.
On PDA, colony circular, reaching 50 mm diam. in 25 days at 25 °C, annulate, white to reddish to purplish red from center to edge, surface rough, dry, raised, edge entire.
Specimen examined: THAILAND, (Dong et al. 2020).
Dong, W, Wang, B, Hyde, KD, McKenzie, EHC et al. (2020) Freshwater Dothideomycetes. Fungal Diversity