Morphological characteristics and phylogenetic analyses revealed four new wood inhabiting fungi (Agaricomycetes, Basidiomycota) in Xizang Autonomous Region, China Author Zhou, Hong-Min 0000-0002-0724-5815 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 Zhang, Xun-Chi 0000-0003-3887-0979 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, Jie-Ting College of Forestry, Southwest Forestry University, Kunming 650224, China Author Wu, Fang 0000-0002-1455-6486 Key Laboratory of Forest Ecology in Tibet Plateau, Ministry of Education, Institute of Tibet Plateau Ecology, Tibet Agricultural & Animal Husbandry University, Nyingchi, Tibet 860000, 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 2024-06-25 106 201 224 journal article 298889 10.3897/mycokeys.106.125831 f94f209e-5718-4870-b3fa-a639ae1aeba4 Calocera ramaria C. L. Zhao & H. M. Zhou sp. nov. Figs 5 , 6 Holotype . China , Xizang , Linzhi , Sejila Mountain National Forest Park , 29 ° 64 ' N, 94 ° 71 ' E , elev. 3852 m , gregarious on humus under Abies , 2 August 2023 , CLZhao 31166 ( SWFC ). Figure 5. Basidiomata and microscopic structures of Calocera ramaria (holotype, CLZhao 31166 , holotype) A, B basidiomata C a section of hymenium D basidiospores E marginal hyphae F internal hyphae. Scale bars: 1 cm ( A, B ); 10 μm ( C – F ). Etymology. Ramaria (Lat.) : refers to the ramal basidiomata of the specimens. Figure 6. Microscopic structures of Calocera ramaria (holotype, CLZhao 31166 ) a basidiospores b basidia with basidiospores. Scale bars: 5 μm ( a ); 10 μm ( b ). Diagnosis. Differed from other species in having ramal basidiomata, septate hyphae, usually 4 - septate basidiospores (9.2–11 × 3.9–4.4 μm). Fruiting body. Basidiomata stipitate, gregarious, bright orange when fresh, orange brown when dry, gelatinous when soaked, corneous when dry, ramal, repeatedly branched, apically blunt, up to 6.2 cm high; stipe 0.7–1 mm in diam, become orange to reddish brown corneous when dry. Internal features. Marginal hyphae hyaline, smooth, thin-walled, septate, simple or branched, without clamp connections, 4–5.5 μm in diam; internal hyphae hyaline, smooth or scabrous, thin- to slightly thick-walled, interwoven, with nodose-septa, without clamp connections, 2–3 μm in diam; hyphidia hyaline, smooth, thin-walled, with a simple septum at base, occasionally terminally branched; basidia hyaline, thin-walled, subclavate to clavate, without basal clamp connection, 23–31 × 2–4 μm; basidiospores hyaline, smooth, thin-walled, oblong-ellipsoid to navicular, straight or curved, apiculate, usually 4 - septate when mature, occasionally 5 - septate, (9.1 –) 9.2–11 (– 11.6) × (3.5 –) 3.9–4.4 (– 4.7) μm, L = 10.18 μm, W = 4.19 μm, Q = 2.43 (n = 30 / 1).