Tai-Shun Li, Hong-Bin Guan, Yanyan Yang, Fang Wu, Qi Zhao, Ying Zhang
Through comprehensive morphological and phylogenetic investigations (ITS and nrLSU), we have delineated three novel species within Cortinarius , as derived from specimens collected in Yunnan Province, China. Cortinarius mucobrunneus is distinguished by its viscid basidiomata, dark brown pileus adorned with translucent stripes, cinnamon to brown lamellae, white stipe leaving a cinnamon ring on the upper part, and elliptical to amygdaliform, strongly verrucose basidiospores measuring 13.5–16 × 8–10 μm. Cortinarius rugosiviscidus is characterized by sticky basidiomata, a light brown pileus with wrinkled surface, brown lamellae, light brown stipe, and elliptical to amygdaliform, moderately verrucose basidiospores measuring 11.5–15 × 7.5–9.5 μm. Cortinarius saloroides is characterized by its violet pileus with fine fibrous scales, mauve to light brown lamellae, bluish violet stipe leaving a light brown ring on the upper part, and subspherical, broadly elliptical to elliptical, moderately verrucose basidiospores measuring 7–8.5 × 5.5–6.5 μm. Differences between the new species and morphologically similar and phylogenetically related species are discussed.