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 in substrate, composed of branched, smooth, septate, brown to dark brown hyphae. Conidiophores 30–41 × 5–6 μm (x¯ = 36 × 6 μm, n = 15), macronematous, mononematous, single or in a small group, straight or slightly flexuous, unbranched, septate, erect, 2–4-septate, cylindrical, smooth, dark brown to brown. Conidiogenous cells 7–9 × 5–6 μm (x¯ = 8 × 5 μm, n = 15), monoblastic, integrated, determinate, terminal, cylindrical, pale brown to brown. Conidia 83–220 × 12–14 μm (x¯ = 151 × 13 μm, n = 20), acrogenous, solitary, obclavate, cylindrical, elongated, straight or curved, truncate at base, rounded at apex, 16–41-distoseptate, slightly constricted at some septa, smooth, brown to greenish-brown, thick-walled.

Conidia cultivated on PDA within 12h and germ tubes produced at the ends. Colonies on PDA, attaining 4 cm after 1 month at room temperature (25 °C), gray at first, later becoming dark gray, loose, flocculent, smooth edge, dark brown on the reverse.

China, Yunnan Province, Kunming City, Yiliang County, Nanpanjiang River, 24°38'28"N; 103°09'38"E, on submerged decaying wood, 12 June 2018; Hongwei Shen and Xiu He, S–1797 (KUN-HKAS 112708), living culture (DLUCC 1797).

Our new isolate clustered with the ex-type strain of Distoseptisporaclematidis (MFLU 17-1501) (Phukhamsakda et al. 2020) with 97%ML/0.99PP bootstrap support (Figure 1). Distoseptisporaclematidis (MFLU 17-1501) was collected on dead culms of Thysanolaenamaxima (Roxb. ex Hornem.) Honda in Yunnan Province, China. Based on morphological analysis, the size and shape of the conidia and conidiophores of our new isolate are similar to D.clematidis. Therefore, we identified our new isolate as D.clematidis and it is a new record from freshwater habitats in China.