Species Diversity of Calocybe (Agaricales, Lyophyllaceae) from Shanxi Province of Northern China

Many species of Calocybe are of great edible value. Nineteen species of Calocybe have been reported from China, which represents about 40% of the global population. However, in Shanxi Province, located in northern China, no Calocybe species had been reported before this study. Our present study showed there are at least eight Calocybe species distributed in this province, including seven known species and a new species. The known species are C. badiofloccosa, C. coacta, C. fulvipes, C. gambosa, C. gangraenosa, C. ionides, and C. pseudoflammula. The new species, Calocybe confusa sp. nov., is described and illustrated, and, morphologically, it is diagnosed by the combination of basidiomata turning black when exposed, cream grey, grey yellowish white to pale brown pileus, narrowly ellipsoid to subcylindrical basidiospores, and the absence of hymenial cystidia. The molecular data for known species are provided. The geography of the Calocybe species in Shanxi Province is discussed.