This research discovered and described four new species of fungi found on dead wood in northeastern China. The study combined traditional microscopic examination with modern DNA analysis to identify these previously unknown species. The findings help expand our understanding of fungal diversity and improve methods for identifying different fungal species. Impacts on everyday life: – Contributes to better understanding of natural decomposition processes in temperate forests – Improves methods for identifying and classifying fungi, which is important for both research and practical applications – Helps document biodiversity in northeastern China, supporting conservation efforts – Advances our knowledge of fungi living on dead wood, which play crucial roles in nutrient cycling – Provides baseline data for potential future applications in biotechnology or forest management