Morphological and molecular identification of four new resupinate species of Lyomyces (Hymenochaetales) from southern China Author Chen, Jun-Zhu Author Zhao, Chang-Lin text MycoKeys 2020 65 101 118 http://dx.doi.org/10.3897/mycokeys.65.48660 journal article http://dx.doi.org/10.3897/mycokeys.65.48660 1314-4049-65-101 D473F178BCB35ACA9782B8C81D7DBEFB Lyomyces macrosporus C.L. Zhao sp. nov. Figs 4 , 8 Holotype. China. Yunnan Province: Puer, Jingdong County, Taizhong Town, Ailaoshan National Nature Reserve, on fallen branch of angiosperm, 24 August 2018, CLZhao 8605 (holotype in SWFC). Etymology. The epithet macrosporus (Lat.): refers to the larger basidiospores. Basidiomata. Annual, resupinate, subceraceous when fresh, becoming pruinose upon drying, up to 22 cm long and 3 cm wide, 100-200 µm thick. Hymenial surface reticulate, cream when fresh, turning cream to buff upon drying. Margin narrow, white to buff. Hyphal system. Monomitic; generative hyphae with clamp connections, hyaline, thick-walled, branched, 2.5-4 µm in diameter, IKI-, cyanophilous; tissues unchanged in KOH. Numerous crystals present among hyphae. Hymenium. Three kinds of cystidia: 1) capitate, hyaline, thin-walled, 19-35 x 3-7 µm ; 2) tapering, hyaline, thin-walled, 13-20 x 2.5-4 µm ; 3) moniliform, hyaline, thin-walled, 15-22 x 4.5-6 µm ; fusoid cystidioles present, hyaline, thin-walled, 15-20 x 2.5-4 µm . Basidia subclavate to clavate, constricted, hyaline, thin-walled, with four sterigmata and a basal clamp connection, 22.2-38 x 4.5-7 µm . Spores. Basidiospores ellipsoid, hyaline, slightly thick-walled, smooth, IKI-, cyanophilous, guttulate, (6.4-)6.7-8.9(-9.1) x 4.4-5.4(-5.7) µm , L = 7.84 µm , W = 4.93 µm , Q = 1.48-1.8 (n = 120/4). Ecology and distribution. Lignicolous, causing a white rot. China. Additional specimens examined. China. Yunnan Province: Puer, Jingdong County, Taizhong Town, Ailaoshan National Nature Reserve, on fallen branch of angiosperm, 4 October 2017, CLZhao 3951; Wuliangshan National Nature Reserve, on fallen branch of angiosperm, 6 October 2017, CLZhao 4516, CLZhao 4531 (SWFC). Figure 4. Basidiomata of Lyomyces macrosporus (holotype). Scale bars: 1 cm ( A ); 5 mm ( B ).