Elaphroporiaailaoshanensis gen. et sp. nov. in Polyporales (Basidiomycota) Author Wu, Zi-Qiang Author Xu, Tai-Min Author Shen, Shan Author Liu, Xiang-Fu Author Luo, Kai-Yue Author Zhao, Chang-Lin text MycoKeys 2018 29 81 95 http://dx.doi.org/10.3897/mycokeys.29.22086 journal article http://dx.doi.org/10.3897/mycokeys.29.22086 1314-4049-29-81 Elaphroporia ailaoshanensis Z.Q. Wu & C.L. Zhao sp. nov. Figs 3, 4 Diagnosis. This species is distinguished by the cream to yellow pore surface upon drying; pores angular, 7-9 per mm. Hyphal system monomitic; generative hyphae thick-walled bearing both clamp connections and simple septa, slightly amyloid, CB+. Basidiospores ellipsoid, hyaline, thin-walled, smooth, IKI- , CB- , 1.9-2.5 x 1.5-2 µm . Figure 3. Basidiomata of Elaphroporia ailaoshanensis (holotype). Scale bars: 1 cm (A); 1 mm (B). Figure 4. Microscopic structures of Elaphroporia ailaoshanensis (drawn from the holotype). A Basidiospores B Basidia and basidioles C Hyphae from trama D Hyphae from subiculum. Holotype CHINA. Yunnan Province: Jingdong county, Ailaoshan Nature Reserve, 2 October 2016, on the angiosperm trunk, CLZhao 595 (Holotype in SWFC). Etymology. Ailaoshanensis (Lat.): referring to the locality (Ailaoshan) of the type specimens. Basidiocarps. Annual, resupinate, easy to separate from substrate, soft corky when fresh, without odour or taste when fresh, becoming rigid and light-weight up on drying, up to 5 cm long, 3.5 cm wide, 4 mm thick at centre. Pore surface cream to pale yellow when fresh, turning to yellow upon drying; pores angular, 7-9 per mm; dissepiments thin, entire. Sterile margin narrow, cream, up to 1 mm wide. Subiculum thin, cream, corky, up to 0.2 mm thick. Tubes concolorous with pore surface, hard corky, up to 3.8 mm long. Hyphal structure. Hyphal system monomitic; generative hyphae thick-walled, slightly amyloid, CB+; tissues unchanged in KOH. Subiculum. Generative hyphae hyaline, thick-walled bearing both clamp connections and simple septa, simple septa more frequent than clamps, occasionally branched, interwoven, 3.5-5.5 µm in diam. Tubes. Generative hyphae hyaline, thick-walled bearing simple septa only, occasionally branched, 3-5 µm in diameter. Cystidia and cystidioles absent; basidia clavate, with four sterigmata and a basal clamp connection, 10.5-14.5 x 3.5-4.5 µm ; basidioles dominant, in shape similar to basidia, but slightly smaller. Spores. Basidiospores ellipsoid, hyaline, thin-walled, smooth, IKI- , CB- , (1.7 -)1.9-2.5(- 2.9) x (1.3 -)1.5-2(- 2.2) µm , L = 2.29 µm , W = 1.74 µm , Q = 1.33-1.81 (n = 120/4). Additional specimens examined (paratypes). CHINA. Yunnan Province: Jingdong county, Ailaoshan Nature Reserve, 2 October 2016, on the angiosperm trunk, CLZhao 596, CLZhao 597, CLZhao 598 (SWFC).