Neodonkiella yinjiangensis Y. Xu & C. L. Zhao 2025, sp. nov.

Neodonkiella yinjiangensis Y. Xu & C. L. Zhao sp. nov. Figs 5, 6 Diagnosis. Differs from other species by pale white to pale cream hymenial surface, a monomitic hyphal system, slightly flexuous leptocystidia, narrowly clavate basidia, and ellipsoid basidiospores. Holotype. China • Yunnan Province, Dehong, Yingjiang County, Tongbiguan Provincial Nature Reserve, 23°48'N, 97°38'E, altitude 1500 m, on the fallen angiosperm branch, leg. C. L. Zhao, 19 July 2023, CLZhao 30585 (SWFC). Etymology. yingjiangensis (Lat.): refers to the locality (Yingjiang County) of the type specimen. Fruiting body. Basidiomata annual, resupinate, slightly adnate, without odor or taste when fresh, soft coriaceous upon drying, up to 3.5 cm long, 0.7 cm wide, 50–100 μm thick. Hymenial surface smooth, white when fresh, white to pale cream when dry, unchanged in KOH. Sterile margin narrow, white, up to 0.5 mm wide. Hyphal system. Monomitic; generative hyphae with simple septa and clamp connections, IKI –, CB –; tissues unchanged in KOH. Subicular hyphae colorless, thick-walled, straight, slightly branched, interwoven, 3–4 μm in diameter. Crystals abundant, crowded. Subhymenium indistinct, hyphae in this layer similar to subicular hyphae. Hymenial layer. Generative hyphae vertical, short-celled, colorless, thin-walled, 2–3 μm in diameter. Crystal abundant, crowded. Leptocystidia colorless, thin-walled, slightly flexuous, smooth, sometimes with small oil drops, numerous in the hymenium, 25–32 × 2.5–4 μm. Basidia narrowly clavate, slightly flexuous, thin-walled, with four sterigmata and a simple septum, 18–23 × 4–5 μm. Basidioles similar to basidia in shape, but slightly smaller. Basidiospores. Ellipsoid, colorless, thin-walled, smooth, occasionally with small oil drops, IKI –, CB –, (3 –) 3.5–5 × (1.5 –) 2–2.5 μm, L = 4.1 μm, W = 2.2 μm, Q = 1.89 (n = 30 / 1).