Unveiling new species of Phragmidiaceae (Basidiomycota, Pucciniales) on rosaceous plants from Guizhou, China

Abstract

Rust fungi associated with Rubus were collected across diverse locations in Guizhou Province, and three new species – Gerwasia amphidasydis on Rubus amphidasys, Phragmidium coreanicola on Rubus coreanus, and Phragmidium parvifolius on Rubus parvifolius are introduced. These novel species are described based on morphological characteristics and phylogenetic analysis of the ITS and LSU loci. Additionally, Gerwasia rubi-setchuenensis is introduced as a new host record on Rubus buergeri. The study includes comprehensive morpho-anatomical descriptions, detailed illustrations, and a phylogenetic tree, providing insights into the taxonomic placement and relationships of these novel taxa within their respective lineages.