Dictyospora thailandica

Dictyospora thailandica Brahamanage, Y.Z. Lu, Boonmee & K.D. Hyde

Index Fungorum number: IF 553179; Facesoffungi number: FoF 03263

Etymology: Name referring to the host locality country Thailand.

Holotype: MFLU 17-0500

Saprobic on submerged decaying wood. Sexual morph: Ascomata 173–212 μm × 165–206 μm diam. (x̄ = 195 × 188 μm, n = 5), superficial, seated on a subiculum, solitary, scattered, globose to subglobose, dark brown to black, surrounded by brown to black setae, with 53–95 (–103) × 3–5 μm septate, tapering towards an acute end at apex. Peridium 21–38 μm wide, composed of several layers of hyaline to brown-cells of textura angularis, with outer layer darkened cells and inner layer pale brown to hyaline cells. Hamathecium comprising numerous filiform, septate, hyaline pseudoparaphyses. Asci 129–182 × 18–24.5 μm (x̄ = 152 × 21 μm, n = 20), 8-spored, bitunicate, cylindrical, apically rounded, shortpedicellate or sessile. Ascospores 76–107 × 4.5–7 μm (x̄ = 95 × 5.5 μm, n = 50), fasciculate, broadly fusiform, cylindrical to long. sub fusiform, elongate, slightly curved, tapering towards rounded ends, phragmoseptate, hyaline, guttulate, smooth-walled. Asexual morph: hyphomycetous, dictyosporous. Conidia 51–100 × 39–62 μm (x̄ = 72.5 × 51 μm, n = 20), blastic, broadly oval to ellipsoid, dictyoseptate, pale brown when immature, becoming dark to black when mature. (Brahamanage et al. 2017)

Culture characteristics: Ascospores germinating on WA within 12 h. Colonies growing on malt extract agar (MEA), reaching 18 mm in 2 weeks at 28°C, effuse, dentate and lobate edges, darkly brown. Mycelium superficial and partly immersed, branched, septate, pale brown to brown, smooth-walled, due to the development of muriform chlamydospores

Material examined: THAILAND, Uttaradit, Laplae, Mae Phun, Ban Ton Klua, on submerged decaying wood, 24 October 2015, S. Boonmee, UTD01 (MFLU 17-0500, holotype), isotype in BBH, ex-type living culture, MFLUCC 16−0001 and UTD 22 (MFLU 17-0703, paratype), ex-type living culture, MFLUCC 16−0215, TBRC.

Freshwater distribution: Thailand (Brahmanage et al. 2017; Lu et al. 2018)