Morphological and molecular identification for four new wood-inhabiting species of Lyomyces (Basidiomycota) from China Author Yuan, Qi 0000-0002-6732-1656 The Key Laboratory of Forest Resources Conservation and Utilization in the Southwest Mountains of China Ministry of Education, Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China, Yunnan Provincial Key Laboratory for Conservation and Utilization of In-forest Resource, Southwest Forestry University, Kunming 650224, China Author Li, Yunchao https://orcid.org/0009-0007-3500-3761 The Key Laboratory of Forest Resources Conservation and Utilization in the Southwest Mountains of China Ministry of Education, Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China, Yunnan Provincial Key Laboratory for Conservation and Utilization of In-forest Resource, Southwest Forestry University, Kunming 650224, China Author Dai, Yunfei https://orcid.org/0009-0007-7734-4142 The Key Laboratory of Forest Resources Conservation and Utilization in the Southwest Mountains of China Ministry of Education, Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China, Yunnan Provincial Key Laboratory for Conservation and Utilization of In-forest Resource, Southwest Forestry University, Kunming 650224, China Author Wang, Kunyan https://orcid.org/0009-0004-1678-9963 The Key Laboratory of Forest Resources Conservation and Utilization in the Southwest Mountains of China Ministry of Education, Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China, Yunnan Provincial Key Laboratory for Conservation and Utilization of In-forest Resource, Southwest Forestry University, Kunming 650224, China Author Wang, Yixuan College of Forestry, Southwest Forestry University, Kunming 650224, China Author Zhao, Changlin 0000-0002-8668-1075 The Key Laboratory of Forest Resources Conservation and Utilization in the Southwest Mountains of China Ministry of Education, Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China, Yunnan Provincial Key Laboratory for Conservation and Utilization of In-forest Resource, Southwest Forestry University, Kunming 650224, China text MycoKeys 2024 2024-10-30 110 67 92 journal article 10.3897/mycokeys.110.133108 Lyomyces zhaotongensis Q. Yuan & C. L. Zhao sp. nov. Figs 9 , 10 Type material. Holotype . China • Yunnan Province , Zhaotong , Wumeng Mountain National Nature Reserve , GPS coordinates 27 ° 77 ' N, 104 ° 29 ' E , altitude 2900 m , on the fallen branch of angiosperm, leg. C. L. Zhao , 29 August 2023 , CLZhao 32878 ( SWFC ). Figure 9. Basidiomata of Lyomyces zhaotongensis (holotype). Scale bars: ( A ) 1 cm; ( B ) 2 mm. Etymology. Zhaotongensis (Lat.) refers to the type locality “ Zhaotong ”. Figure 10. Microscopic structures of Lyomyces zhaotongensis (holotype): basidiospores ( A ), basidia ( B ), basidioles ( C ), fusoid cystidia ( D ), a section of hymenium ( E ). Scale bars: 20 µm ( A – E ). Description. Basidiomata annual, resupinate, adnate, farinaceous when fresh, becoming coriaceous upon drying and up to 9.5 cm long, 3 cm wide, 30–80 um thick. Hymenial surface grandinioid, cream when fresh and cream to buff upon drying. Sterile margin white to cream and up to 1 mm wide. Hyphal system monomitic, generative hyphae with clamp connections, colourless, thick-walled, branched, 1.5–2 µm in diameter; IKI –, CB –, tissues unchanged in KOH . Numerous crystals present amongst generative hyphae. Cystidia fusoid, colourless, thin-walled, smooth, 16–20.5 × 2.5–3.5 µm. Basidia clavate, with 4 sterigmata and a basal clamp connection, 14–16.5 × 2.5–3.5 µm. Basidiospores broadly ellipsoid, colourless, thin-walled, smooth, with oil drops, CB –, IKI –, 2.6–3.5 × 2.5–3 µm, L = 2.99 µm, W = 2.75 µm, Q = 1.08 (n = 30 / 1). Additional specimen examined ( paratype ). China • Yunnan Province , Zhaotong , Wumeng Mountain National Nature Reserve , GPS coordinates 27 ° 77 ' N, 104 ° 29 ' E , altitude 2900 m , on the fallen branch of angiosperm, leg. C. L. Zhao , 10 August 2024 , CLZhao 40335 ( SWFC ) .