Mastigomycotina is a microscopic fungal group that includes species with flagellated spores. This group was previously classified as a subdivision of the fungi kingdom, but current scientific evidence shows that it groups with the Chytridiomycota. Mastigomycotina is a term used by botanists and mycologists to describe these fungi species, but there are other scientific names for this group. These include Chytridomycetes, Oomycete, Zygomycetes, and Myxomycetes. These synonyms are often used interchangeably and provide a more specific classification of certain fungal species. Using these alternatives can help to broaden our understanding of the biodiversity and evolution of fungi.