Abstract
Within the family Inocybaceae, many species of Mallocybe and Pseudosperma have been reported, but there are only a few reports on these two genera from north China. In this study, six collections of Mallocybe and 11 collections of Pseudosperma were studied by morphological and phylogenetic methods. Phylogenetic analyses based on sequence data from three or two different loci (ITS, LSU, and rpb2 for Mallocybe; ITS and LSU for Pseudosperma) are performed to infer species relationships within genera Mallocybe and Pseudosperma, respectively. Results indicate that eight species of Mallocybe and Pseudosperma are found in Shanxi province, north China; two new species of Mallocybe, M. depressa and M. picea, are described. Overall, six species belong to Pseudosperma, of which three are new: P. gilvum, P. laricis and P. pseudoniveivelatum.