Two new wood-inhabiting fungal species (Polyporales, Basidiomycota) from Yunnan Province, China Wang, Lu Su, Jiangqing Muhammad, Akmal Zhao, Changlin Phytotaxa 2024 2024-05-08 647 1 1 18 L. Wang & C.L. Zhao L. Wang & C. L. Zhao [136,763,1610,1637] Agaricomycetes Meruliaceae Steccherinum Fungi Polyporales 6 7 Basidiomycota species wumengshanense sp. nov.  MycoBank no.: 851550.    Etymology:—  wumengshanens(Lat.): refers to the locality (Wumengshan National Natural Reserve) of the typespecimen.      Holotype:— CHINA. Yunnan Province: Zhaotong, Yiliang County, Luozehe Town, Lijiaping Village, GPS coordinates: 27°29′ N, 103°55′ E, altitude:  1900 masl., on the fallen branch of angiosperm, leg. C.L. Zhao,  24 August 2022, C.L. Zhao23586 ( SWFC!).    Basidiomata:—Annual, resupinate, adnate, corticoid, up to 3 cmlong, 2 cmwide, and 1 mmthick. Hymenial surface grandinoid, white when fresh, turning to white to cream (4A2/3) upon drying, aculei 5–8 per mm, the length of aculei up to 0.1 mm. Sterile margin narrow, cream (4A2/3), up to 0.5 mmwide.   Hyphal system:—Monomitic; generative hyphae with clamp connections, colorless, thin-walled, frequently branched, interwoven, 2.5–4 µm in diameter; IKI–, CB–, tissues unchanged in KOH.   FIGURE 2.Maximum parsimony strict consensus tree illustrating the phylogeny of the new species and related species in  Steccherinumwithin Steccherinaceaebased on ITS+nLSU sequences. The branch is labeled with a maximum likelihood lead value greater than 70%, a reduced lead value greater than 50% and a Bayesian posterior probability greater than 0.95. The new species are in bold.   FIGURE 3.  Rhodoantrodia purpurascens(holotype, C.L. Zhao 26267): basidiomata on the substrate (A), macroscopic characteristics of hymenophore (B). Bars: (A) = 1 cm and (B) = 1 mm.   FIGURE 4. Microscopic structures of  Rhodoantrodia purpurascens(holotype, C.L. Zhao 26267): basidiospores (A), basidia and basidioles (B), cystidia (C), a section of the hymenium (D), hyphae from context (E). Bars: (A–E) = 10 µm.   Hymenium:—Skeletocystidia numerous, subclavate to cylindrical, colorless, thin-walled, strongly encrusted in the surface and almost entirely, 75–97 × 10–12 µm; cystidioles absent. Basidia subclavate to barrel, hyaline, thin-walled, with a basal clamp connection and four sterigmata, 15–18 × 5–6.5 µm; basidioles dominant, in shape similar to basidia, but slightly smaller.   Spores:—Basidiospores ellipsoid to subglobose, hyaline, thin-walled, smooth, IKI–, CB–, (4–)4.5–6(–6.5) × 3–4.5 µm, L = 5.16 µm, W = 3.69 µm, Q = 1.40 (n = 30/1). 4929284301 2022-08-24 SWFC C. L. Zhao China Yiliang County 1900 27.483334 Luozehe Town 1237 103.916664 Zhaotong 6 7 1 Yunnan Province holotype