Referring to the collecting location, Lancangjiang River in China.

KUN-HKAS 112712

Saprobic on submerged wood in freshwater River. Sexual morph: Undetermined. Asexual morph: Colonies effuse, hairy, glistening, brown to dark. Mycelium partly immersed in the substratum, composed of hyaline to pale brown, septate, branched hyphae. Conidiophores 144–204 × 5–6 μm (x¯ = 175 × 6 μm, n = 20) macronematous, mononematous, solitary, inflate at the base, cylindrical, straight or slightly flexuous, 6–11-septate, dark brown, hyaline and rounded at apex. Conidiogenous cells 12–24 × 4–5 μm (x¯ = 18 × 5 μm, n = 20) integrated, terminal, monoblastic, cylindrical, brown. Conidia 64–84 × 9–10 μm (x¯ = 74 × 10 μm, n = 20), acrogenous, solitary, narrowly obclavate or obspathulate, tracted at base, tapering towards apex, 3–10-euseptate, brown to dark brown, thin-walled, becoming paler or hyaline towards apex, guttulate, with a darkened scar at base, smooth-walled.

Conidia cultivated on PDA within 12h and germ tubes produced at the apex. Colonies on PDA, reaching 4.5 cm in 1 month at room temperature (25 °C). Mycelium loose, flocculent, smooth edges, convex middle, pale brown to dark brown on the surface of PDA. Smooth, black on the reverse.

China, Yunnan Province, Dali City, Lancangjiang River, 22°36'36"N; 100°37'59"E, on submerged decaying wood, 20 July 2017, Qishan Zhou and Qingxiong Ruan S–1864 (KUN-HKAS 112712, holotype; MFLU 21-0111, isotype), ex-type living culture (DLUCC 1864 = CGMCC 3.20265).

Phylogenetic analysis showed that Distoseptisporalancangjiangensis clustered as a sister taxon to D.suoluoensis with 97%ML/0.98PP support. Distoseptisporalancangjiangensis is similar to D.suoluoensis in having long conidiophores, monoblastic conidiogenous cells, and obclavate to rostrate, euseptate conidia. However, D.suoluoensis has yellowish-brown or dark olivaceous, verrucose conidia, while in D.lancangjiangensis conidia are brown to dark brown and smooth-walled. Moreover, D.lancangjiangensis has smaller conidia than those of D.suoluoensis (64–84 × 9–10 μm vs. 80–125 × 8–13 μm) (Yang et al. 2018). Distoseptisporalancangjiangensis and D.bambusae have similar conidial shapes, but D.lancangjiangensis having longer conidia (64–84 × 9–10 μm vs. 45–74 × 5.5–10 μm) and longer conidiophores (144–204 × 5–6 μm vs. 40–96 × 4–5.5 μm). Furthermore, D.bambusae has polyblastic or monoblastic conidiogenous cells and olivaceous or brown conidia, while D.lancangjiangensis only has monoblastic conidiogenous cells and brown to dark brown conidia (Sun et al. 2020).