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 pileata K. Y. Luo & C. L. Zhao sp. nov. Figs 6 , 7 Holotype . China . Yunnan Province , Pu’er , Jingdong County , Wuliangshan National Nature Reserve , 24 ° 23 ′ N , 100 ° 45 ′ E , altitude 2350 m a. s. l. , on the angiosperm trunk , leg. C. L. Zhao , 6 October 2017 , CLZhao 4456 ( SWFC ). Figure 6. Basidiomata of Trechispora pileata (holotype) A, B the front of the basidiomata C, D the back of the basidiomata. Scale bars: 0.5 cm (A) ; 1 mm (B) ; 0.5 cm (C) ; 1 mm (D) . Figure 7. Microscopic structures of Trechispora pileata (holotype) A basidiospores B basidia and basidioles C hyphae of context of pileus D a spine trama of basidiomata. Scale bars: 5 μm (A) ; 10 µm (B, C) . Etymology. Pileata (Lat.) : referring to the pileate basidiomata. Description. Basidiomata annual, with a laterally contracted base, solitary or imbricate. Pileus fan shaped, cortical to corky, up to 1.5 cm long, 1 cm wide, and 2 mm thick, yellowish to yellowish brown, the surface radially striate covered with appressed scales, azonate; the hymenophore surface odontioid, yellowish brown, up to 1 mm long. Context cream, 1 mm thick. Sterile margin indistinct, slightly buff, and 0.5 mm wide. Hyphal system monomitic, generative hyphae with clamp connections, colorless, thick-walled, frequently branched, interwoven, hyphae in spines 2.5–4 µm in diameter, IKI –, CB –, tissues unchanged in KOH. Hyphae in context colorless, thin- to thick-walled, unbranched, interwoven, 4.5–6 µm in diameter, IKI –, CB –, tissues unchanged in KOH. Cystidia and cystidioles absent; basidia subcylindrical, constricted, with four sterigmata and a basal clamp connection, 5–7 × 2.5–4 µm. Basidiospores subglobose to broad ellipsoid, colorless, thin-walled, smooth, IKI –, CB –, (2.5 –) 2.8–5 (– 5.5) × (2.5 –) 3–4.7 µm, L = 4 µm, W = 3.56 µm, Q = 1.12 (n = 30 / 1).