Two new species of genus Leucoagaricus and Leucocoprinus (Agaricaceae, Agaricales) from China

In this study, two new species, Leucoagaricus bailangshanensis and Leucocoprinus ferrugineus, were discovered. Phylogenetic analyses based on ITS, nrLSU, rpb 2, and tef 1 - α sequences confirm that these taxa represent distinct lineages within well-supported monophyletic groups. Leucoagaricus bailangshanensis is characterized by a yellow-orange center on the pileus, a margin bearing floccules, and relatively long sterigmata, which distinguish it from closely related species.

Leucocoprinus ferrugineus can be recognized by its mahogany-red pileus center, a white annulus with a tomato-red margin that turns brown when bruised, and ellipsoid basidiospores. Detailed morphological descriptions, along with color photographs, illustrations, and a phylogenetic tree, are provided to clarify the taxonomic positions and relationships of these two new species.