Species Diversity of Amanita Section Vaginatae in Eastern China, with a Description of Four New Species

Species of Amanita sect. Vaginatae (Fr.) Quel. are challenging to delimitate due to the morphological similarity or morphostasis among different taxa. In this study, a multi-locus (nuc rDNA region encompassing the internal transcribed spacers 1 and 2 with the 5.8S rDNA, the D1-D3 domains of nuc 28S rDNA, partial sequences of translation elongation factor 1-a, and the second largest subunit of RNA polymerase II) phylogeny was employed to investigate the species diversity of the section in eastern China. Sixteen species were recognized, including four new species; namely, A. circulata, A. multicingulata, A. orientalis, and A. sinofulva. They were documented with illustrated descriptions, ecological evidence, and comparisons with similar species. A key to the species of the section from eastern China is provided.

Automated summary

This study investigated the species diversity of Amanita sect. Vaginatae in eastern China using a multi-locus phylogeny. Sixteen species were identified, including four new species. The study provided detailed descriptions, ecological evidence, and comparisons with similar species for these species, and also provided a key to the species of the section from eastern China.