This research discovered and described six new species of fungi from freshwater environments in China and Thailand. The study helps us better understand the diversity of microscopic fungi that break down wood in freshwater ecosystems. These findings are important because: • They demonstrate the rich biodiversity still being discovered in Asian freshwater environments • They improve our understanding of how dead plant material is decomposed in aquatic ecosystems • They provide baseline data for monitoring environmental changes in freshwater habitats • They contribute to the global inventory of fungal species diversity • They help establish evolutionary relationships between different groups of fungi