Pseudogymnoascus is a genus of fungi known for its role in the environment and its impact on wildlife. It is particularly recognized for its association with white-nose syndrome, a disease affecting bat populations in North America. This fungus thrives in cold, dark environments, such as caves, where it can grow on the skin of hibernating bats. The presence of Pseudogymnoascus destructans, the species responsible for white-nose syndrome, has led to significant declines in bat populations. This has raised concerns about the ecological balance, as bats play a crucial role in controlling insect populations and pollinating plants.