Morphological characteristics and phylogenetic analyses revealed two new species from China and a new record from Jilin Province of Agaricales

Abstract

In this study, we have found two new species—Stropharia subrugosoannulata and Stropharia microaeruginosa. Phylogenetic analyses, based on the internal transcribed spacer regions (ITS) and the nuclear ribosomal RNA gene (nrLSU), suggest that the two new species are distinct and monophyletic. S. subrugosoannulata is distinguished from other species of the genus Stropharia by the pileus covered with greyish-orange squamules in the centre, stipe light brown and surface covered with white triangular squamules. S. microaeruginosa differs from other species in its pileus bluish-grey when young becoming lighter towards margins, later greyish-turquoise lightens towards the edges and surface radially striate when young, lamellae adnate to subdecurrent, stipe with white squamules at the base, acanthocytes absent. The new record species from Jilin Province, Clitolyophyllum umbilicatum was also confirmed, based on morphological and molecular study. Here, we have given full descriptions of each species, colour images, illustrations and two phylogenetic trees that show the placement and relationship of the two new species and the new record are provided.