Definition: The coelomactrata is a type of fungus that belongs to the family of Ascomycota and are known for their ability to produce large, complex structures called coccoliths or colecysts. These structures are typically found in fungi living on other organisms, such as plants or animals. The term "coelomactra" refers to a specific type of fungus that can be distinguished from other coelomactrata by its appearance and function.