Septofusispora thailandic

Septofusispora thailandic G.C. Ren and K.D. Hyde 2022

Index Fungorum number: IF 559805, Facesoffungi number: FoF 10703

Etymology: The epithet reflects Thailand, where this species was collected.

Saprobic on dead woody twigs of Castanopsis sp. Sexual morph: Ascomata 140–190 × 155–210 μm ( = 165 × 180 μm, n = 5), solitary, scattered, erumpent-to-immersed, uni-loculate, globose-to-sub-globose, black. Ostiole central. Peridium 20–35 μm wide, thick, comprising 3–5 layers of light-brown-to-brown cells of textura angularis. Hamathecium of sparse, 1–2 μm wide, cylindrical, septate, branched, cellular pseudoparaphyses. Asci 60–80 × 12–16 μm ( = 73.9 × 14.9 μm, n = 20), 8-spored, bitunicate, fissitunicate, clavate, slightly broad at center, apically rounded, with short, rounded pedicel. Ascospores 24–26.5 × 5–6 μm (= 25.5 × 5.3 μm, n = 30), overlapping uni- to bi-seriate, pale brown, narrowly fusiform, cell above median septum slightly wider than below, tapering towards ends, slightly acute at both ends, with 4–5 transverse septa, constricted at the septa, smooth-walled, guttulate, without a mucilaginous sheath. Asexual morph: Undetermined.

Culture characteristics: The colonies on PDA, reaching 15–20 mm diam. at 14 days at room temperature (25–30 °C), superficial, entire margin, umbonate at center, rough surface, with dense mycelia, velvety, raised, gray at the center, white at the edge; reverse atrovirens, darkening towards center and white at the edge.

Material examined: Thailand, Tak Province, Mogro Amphoe Umphang, on dead woody twigs of Castanopsis sp., 20 August 2019, G.C. Ren, T213 (MFLU 22-0043 holotype), ex-type culture KUMCC 21-0647; ibid., T214 (MFLU 22-0044, isotype), living culture KUMCC 21-0652.