Ophiostoma is a genus of fungi known for its role in the decomposition of wood and its association with various tree diseases. These fungi are often found in the bark and wood of trees, where they can cause significant damage, particularly in species like pine and spruce. Some species of Ophiostoma are also known to be transmitted by bark beetles, which can facilitate the spread of the fungi during their feeding activities. This relationship highlights the importance of Ophiostoma in forest ecosystems, as it can impact tree health and forest dynamics.