Cortinarius sect. Riederi: taxonomy and phylogeny of the new section with European and North American distribution

Tor Erik Brandrud, Geert Schmidt-stohn, Kare Liimatainen, Tuula Niskanen, Tobias Guldberg Frøslev, Karl Soop, Dimitar Bojantchev, Ilkka Kytövuori, Thomas Stjernegaard Jeppesen, Francesco Bellù, Günter Saar, Bernhard Oertel, Tahir Ali, Marco Thines, Bálint Dima