Morphological and molecular identification for four new wood-inhabiting species of Trechispora (Basidiomycota) from China Author Luo, Kai-Yue 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 Su, Jiang-Qing https://orcid.org/0009-0008-5480-4502 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 Zhao, Chang-Lin 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 2024-05-15 105 155 178 journal article 296099 10.3897/mycokeys.105.120438 b6dc4b58-e16c-40af-9bd9-c044fb407687 Trechispora albofarinosa K. Y. Luo & C. L. Zhao sp. nov. Figs 2 , 3 Holotype . China . Yunnan Province , Pu’er , Jingdong County , Huangcaoling , Wuliangshan National Nature Reserve , 24 ° 23 ′ N , 100 ° 45 ′ E , altitude 2350 m a. s. l. , on the fallen branch of Pinus , leg. C. L. Zhao , 5 October 2017 , CLZhao 4356 ( SWFC ). Figure 2. Basidiomata of Trechispora albofarinosa (holotype) A the front of the basidiomata B characteristic hymenophore. Scale bars: 1 cm (A) ; 1 mm (B) . Figure 3. Microscopic structures of Trechispora albofarinosa (holotype) A basidiospores B basidia and basidioles C a cross section of basidiomata. Scale bars: 5 μm (A) ; 10 µm (B, C) . Etymology. Albofarinosa (Lat.): referring to the farinose basidiomata with white hymenial surface. Description. Basidiomata annual, resupinate, farinose, without odor or taste when fresh, up to 3.5 cm long, 1.5 cm wide, and 300–500 µm thick. Hymenial surface flocculence, white when fresh, white to cream on drying. Sterile margin indistinct, white, and up to 0.5 mm wide. Hyphal system monomitic, generative hyphae with clamp connections with ampullaceous septa, colorless, thick-walled, frequently branched, interwoven, 2–3.5 µm in diameter; IKI –, CB –, tissues unchanged in KOH. Cystidia and cystidioles absent; basidia clavate, with four sterigmata and a basal clamp connection, 6.5–10 × 3.5–5 µm. Basidiospores ellipsoid, colorless, thin-walled, aculeate, IKI –, CB –, 2.5–3.5 (– 4) × 2–2.5 (– 3.5) μm, L = 3.18 µm, W = 2.44 µm, Q = 1.3 (n = 30 / 1).