Studies of the Cortinarius saniosus (Fr.: Fr.) Fr. complex and a new closely related species, C. aureovelatus (Basidiomycota, Agaricales)

The variation of the widely spread Cortinarius saniosus is described with respect to morphological, ecological and molecular characteristics. C. chrysomallus D. Lamoure and C. aureomarginatus P.D. Orton are regarded as synonymous with C. saniosus based on morphological and molecular data. A new closely related species C. aureovelatus Bendiksen, K. Bendiksen & H. Lindstr., growing in coniferous and mountain birch forests, is described. A taxonomical and nomenclatural treatment of the complex, based upon present knowledge, is proposed.