Definition: Rhynchonelliformea is a family of fungi that belongs to the class Sclerotia, commonly known as fungus. They are characterized by their elongated and flattened shape, which allows for efficient growth in various environments such as moist soil, damp forest floors, and even underwater conditions. Rhynchonelliformea can be found on trees, mosses, and other fungi, often forming a complex web of symbiosis with their host plant.