Xylodon bambusinus and X. xinpingensis spp. nov. (Hymenochaetales) from southern China Author Ma, Xiang 0000-0001-8824-6686 Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, P. R. China & Yunnan Academy of Biodiversity, Southwest Forestry University, Kunming, Yunnan 650224, China & fungixiangm @ 163. com; https: // orcid. org / 0000 - 0001 - 8824 - 6686 Author Zhao, Chang-Lin 0000-0002-8668-1075 Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, P. R. China & Yunnan Academy of Biodiversity, Southwest Forestry University, Kunming, Yunnan 650224, China & College of Biodiversity Conservation, Southwest Forestry University, Kunming 650224, P. R. China & fungichanglinz @ 163. com; https: // orcid. org / 0000 - 0002 - 8668 - 1075 text Phytotaxa 2021 2021-07-19 511 3 231 247 http://dx.doi.org/10.11646/phytotaxa.511.3.3 journal article 10.11646/phytotaxa.511.3.3 1179-3163 5426651 Xylodon xinpingensis C.L. Zhao & X. Ma , sp. nov. Figs. 6 , 7 MycoBank no .: MB 838335 Holotype :— CHINA . Yunnan Province , Yuxi , Xinping County , Jinshan Primeval Forest Park , E 101°30′ , N 23°56′ , alt. 2500 m , on fallen angiosperm trunk, 2 January 2019 , CLZhao 9174 ( SWFC !). Etymology :— xinpingensis (Lat.) : referring to the locality (Xinping County) of the type specimens. Basidiomata :—Annual, adnate, soft-membranaceous, without odor or taste when fresh, becoming cotton upon drying, up to 8 cm long, 4 cm wide, 500–1000 µm thick. Hymenial surface reticulate, white to cream when fresh, turn to cream upon drying. Subiculum very thin, cream. Margin sterile, 0.1 cm wide, white. Hyphal structure :—Hyphal system monomitic, generative hyphae with clamp connections, colorless, thickwalled, branched, interwoven, 2–6 µm in diameter, IKI-, CB-; tissues unchanged in KOH. Hymenium :—Cystidia fusiform, covered with crystal, colorless, thin-walled, 19.5–31 × 2–6 µm; basidia clavate, with 4 sterigmata and a basal clamp connection, 18.5–33 × 3–6.5 µm. Spore s:—Basidiospores subglobose, colorless, smooth, thin-walled, with oil drops, IKI-, CB-, (4.1–)4.5–6(–6.4) × (3–)3.5–5 µm, L = 5.15 µm, W = 4.21 µm, Q = 1.23 (n = 60/2). Holytype: (4.8–)5–6.4 × (3.4–)3.5–5(5.1–) µm, L = 5.4 µm, W = 4.43 µm, Q = 1.23 (n = 30/1). Ecology and distribution :—Lignicolous, causing a white rot. Found in China . Additional specimen ( paratype ) examined :— CHINA , Yunnan Province , Yuxi , Xinping County , Jinshan Primeval Forest Park , E 101°30′ , N 23°56′ , alt. 2500 m , on fallen angiosperm trunk, 2 January 2019 , CLZhao 9125 ( SWFC !) .