Lyomyces wumengshanensis Q. Yuan & C. L. Zhao 2024, sp. nov.

Lyomyces wumengshanensis Q. Yuan & C. L. Zhao sp. nov. Figs 7, 8 Type material. Holotype. China • Yunnan Province, Zhaotong, Daguan County, Wumeng Mountain National Nature Reserve, GPS coordinates 27 ° 72 ' N, 103 ° 92 ' E, altitude 1424 m, on a fallen branch of angiosperm, leg. C. L. Zhao, 3 July 2023, CLZhao 29374 (SWFC). Etymology. Wumengshanensis (Lat.) refers to the type locality “ Wumeng Mountain ”. Description. Basidiomata annual, resupinate, adnate, coriaceous when fresh, becoming farinaceous upon drying, without odour and taste when fresh and up to 5 cm long, 2 cm wide, 150 µm thick. Hymenial surface grandinioid, white when fresh, to cream upon drying. Sterile margin white and up to 1 mm wide. Hyphal system monomitic, generative hyphae with clamp connections, colourless, thick-walled, branched, 3–4 µm in diameter; IKI –, CB –, tissues unchanged in KOH. Numerous crystals present amongst generative hyphae. Cystidia capitate, colourless, thin-walled, smooth, 24.5–29 × 3–4 µm; basidia subclavate to barrelled, colourless, with 4 sterigmata and a basal clamp connection, 11.5–14 × 5.5–6.5 µm. Basidiospores ellipsoid to broad ellipsoid, colourless, thin-walled, smooth, with one oil drop, CB –, IKI –, 4–6 × 3–5 µm, L = 5.4 µm, W = 4.2 µm, Q = 1.28–1.32 (n = 120 / 4). Additional specimen examined (paratype). China • Yunnan Province, Zhaotong, Wumeng Mountain National Nature Reserve, 27 ° 72 ' N, 103 ° 92 ' E, altitude 1424 m, on a fallen branch of angiosperm, leg. C. L. Zhao, 29 August 2023, CLZhao 31486, CLZhao 32705, CLZhao 32736, CLZhao 32800, CLZhao 32869, CLZhao 32915, CLZhao 32933 (SWFC).