Ecotypification of local populations of rare species Calvatia gigantea (Basidiomycota: Agaricales) in ultracontinental zones of Mongolia and RussiaNyamsuren Kherlenchimeg, Konstantin Baikov and Ganbaatar BurenbaatarBIO Web Conf., 24 (2020) 00034DOI: https://doi.org/10.1051/bioconf/20202400034