This research describes three newly discovered mushroom species from Korea belonging to the genus Psathyrella. The researchers carefully examined physical specimens and documented their unique characteristics using microscopes and standardized methods. This expands our knowledge of fungal diversity in Korea and helps scientists better understand mushroom classification and evolution. Impacts on everyday life: • Helps mycologists and naturalists accurately identify mushroom species • Contributes to biodiversity documentation and conservation efforts • Advances scientific understanding of fungal evolution and relationships • Supports potential future discoveries of useful compounds from fungi • Aids in cataloging and preserving Korea’s natural heritage