Identification of three novel species and one new record of (Kirschsteiniotheliaceae, Kirschsteiniotheliales) from Jiangxi, China.

Fungal diversity is rapidly expanding, with numerous species being discovered worldwide. While plant debris is a habitat favoring the survival and multiplication of various microbial species. In this study, several kirschsteiniothelia-like isolates were collected from dead branches of unidentified perennial dicotyledonous plants. Based on morphological examination and phylogenetic analyses of combined ITS, LSU, and SSU sequences data using maximum-likelihood and Bayesian inference, three new species of , namely , , and , were introduced, and one known species, , was recorded for the first time from China. To improve our comprehensive knowledge of the species diversity of , all accepted species with morphological characteristics, sequence data, asexual morphs, habitat, host, and locality are listed.