Saprobic on submerged wood in freshwater River. Sexual morph: Undetermined. Asexual morph: Colonies on the substratum superficial, effuse, scattered, hairy, dark brown. Mycelium partly immersed, composed of branched, septate, smooth, brown to dark brown hyphae. Conidiophores 41–59 × 4–5 μm (x¯ = 50 × 5 μm, n = 20) macronematous, mononematous, unbranched, single, erect, straight or slightly curved, smooth, 3–6-septate, pale brown to brown. Conidiogenous cells monoblastic, integrated, determinate, terminal, dark brown, cylindrical. Conidia 46–87 × 9–12 μm (x¯ = 67 × 10 μm, n = 25) acrogenous, solitary, dry, smooth, obclavate, elongated, straight or slightly curved, truncate at base, tapering towards apex, 6–19-septate, dark grayish-brown to light yellow-green, thick-walled.

Conidia cultivated on PDA within 12 h and germ tubes produced at the apex. Colonies on PDA, reaching 6 cm after 6 weeks at room temperature (25 ℃). Mycelium loose, flocculent, neat edges, convex in middle, pale brown to dark brown. Black, smooth on the back.

China, Yunnan Province, Lushui City, Nujiang River, 26°23'12"N; 98°53'94"E, on submerged decaying wood, 3 May 2016, Zonglong Luo and Songming Tang, S-876 (KUN-HKAS 112710), living culture (DLUCC 876 = KUNCC 21-10710)

Our new collection is identical to Distoseptisporathysanolaenae in characters of the conidiophores, conidiogenous cell, and conidia (Phookamsak et al. 2019). Furthermore, our new isolate phylogenetically clusters with the ex-type strain of D.thysanolaenae (KUN-HKAS 102247) with 100%ML/1.00PP support (Figure 1). Distoseptisporathysanolaenae was collected from terrestrial habitats in China, while, our new isolate was collected from freshwater habitat in China. Therefore, we identified our new collection as D.thysanolaenae, and it is new to freshwater habitats in China.