Two new species and a new name of Entoloma subgenus Cubospora (Entolomataceae, Agaricales) from subtropical East China

Based on morphological and phylogenetic evidence, two new species of Entoloma subgen. Cubospora, E. fucatum and E. pseudobrunneosquamulosum, are described from subtropical regions of China. Entoloma fucatum is distinguished by its grayish-ruby pileus that is hygrophanous and striationless, cuboid basidiospores, sterile lamellar edges, and the presence of both cheilocystidia and pleurocystidia.

Entoloma pseudobrunneosquamulosum is characterized by its collybioid basidiomata, a brown pileus with squamules on its surface and lacking striations, cuboid basidiospores, heterogeneous lamellar edges, the presence of both cheilocystidia and pleurocystidia, and pileipellis cells containing light brown intracellular pigments. Detailed descriptions, color photographs, and scanning electron micrographs of spores are presented.

In addition, E. pseudotomentosum nom. nov. is herein proposed as a replacement name for E. tomentosum J. Q. Yan, L. G. Chen & S. N. Wang, which is a later homonym of E. tomentosum Z. S. Bi.