This research identified a previously undiscovered fungal species in Korea that was found living in beetle-infested elm trees. The fungus, named Mariannaea samuelsii, can break down various wood components and may play a role in wood decomposition. This discovery helps scientists better understand the diversity of fungi in Korea and their potential roles in forest ecosystems. Impacts on everyday life: • Helps track the spread of wood-degrading fungi that could affect tree health • Contributes to understanding forest ecosystem health and biodiversity • Provides insight into natural wood decomposition processes • May lead to discovery of new enzymes useful in biotechnology applications