This research provides a comprehensive revision of truffle-like fungi belonging to the genus Gautieria in Europe and the Mediterranean region. Using both traditional morphological methods and modern DNA analysis, the scientists discovered many new species and clarified how these fungi are classified. The study revealed that most species form specific partnerships with certain trees and have particular soil preferences. Impacts on everyday life: – Helps forest managers better understand the fungal diversity in their ecosystems – Provides essential knowledge for conservation efforts of these important mycorrhizal fungi – Improves our understanding of how fungi adapt to different climatic conditions – Aids in the identification and mapping of valuable forest ecosystems – Contributes to our knowledge of underground fungal networks that support forest health