Class Eumycetes is a group of fungi that includes a diverse range of species. Some potential synonyms for this class include true fungi, euascomycetes, and filamentous fungi. True fungi refers to fungi that have distinct cellular structures containing chitin, which separates them from other groups of fungi like slime molds. Euascomycetes refers to the unique ascus, or sac-like structure, that develops and contains spores within the fungi. Filamentous fungi refers to the threadlike structures that compose the body of these fungi, which enable them to spread and develop. Each of these terms can be used interchangeably with Class Eumycetes to describe this diverse group of fungi.