Morphological characters and molecular data reveal a new species of Rhodonia (Polyporales, Basidiomycota) from China Author Yuan, Yuan Institute of Microbiology, PO Box 61, Beijing Forestry University, Beijing 100083, China Author Shen, Lu-Lu Institute of Microbiology, PO Box 61, Beijing Forestry University, Beijing 100083, China & Yichang Seed Administrative bureau, Yichang 443000, China text Phytotaxa 2017 2017-11-17 328 2 175 182 http://dx.doi.org/10.11646/phytotaxa.328.2.8 journal article 302519 10.11646/phytotaxa.328.2.8 7197b150-648b-4304-9d92-02ce1d7d5037 1179-3163 13722658 Rhodonia tianshanensis Yuan Yuan & L.L. Shen sp. nov. ( Figures 2–3 ) MycoBank no.:—MB 821993 Type:— CHINA . Xinjiang Autonomous Region, Gongliu County, West Tianshan Nature Reserve, on stump of Picea , 14 September 2015 , Dai 15934 ( Holotype , BJFC 020035). Etymology:— Tianshanensis (Lat.) : refers to type locality of Tianshan in China . Diagnosis:—Differing from Rhodonia placenta by having fusoid cystidioles. Description: —Basidiocarps annual, resupinate to subpileate, soft corky, without odor or taste when fresh, becoming corky to fragile upon drying, up to 15 cm long, 5.5 cm wide and 1.5 cm thick at center, not easily separated from the substrate. The subpileus white when fresh, becoming pale brown when dry. Pore surface white to cream when juvenile, pinkish buff with age, becoming pale brown to brown upon drying; sterile margin narrow to almost lacking; pores angular, 3–4 per mm; dissepiments thin, entire when juvenile, becoming lacerate with age. Tube layer oblique, clay-buff, fragile, up to 1.5 mm long. Subiculum white when fresh, cream when dry, corky, very thin to almost lacking. Hyphal system monomitic; composed of generative hyphae with clamp connections, IKI–, CB –; tissues unchanged in KOH. Context composed of hyaline, thin-walled, generative hyphae, occasionally branched, interwoven, 4–5.5 μm diam. Tubes composed of hyaline, thin- to slightly thick-walled generative hyphae, infrequently branched, interwoven, 2.5–4 μm in diam. Cystidioles fusoid, hyaline, thin-walled, 25–38 × 4–6 μm. Basidia clavate, hyaline, bearing four sterigmata and a basal clamp connection, 18–22 × 3–5 μm; basidioles in shape similar to basidia, but distinctly smaller. Basidiospores cylindrical, hyaline, thin-walled, smooth, IKI–, CB –, (5–)5.2–5.5(–5.8) × (2.4–)2.5–2.8(–3) μm, L = 5.42 μm, W = 2.72 μm, Q = 1.86–1.96 (n = 60/2). Additional specimen examined ( paratype ):— CHINA . Xinjiang Autonomous Region, Gongliu County, West Tianshan Nature Reserve, on rotten wood of Picea , 13 September 2015 , Dai 15915 ( BJFC 020016).