Аннотация:Ustilaginomycotina represents one of three subphyla of the Basidiomycota, comprising 10 orders, 26 families, and 121 genera, with more than 1,700 species in total. Whereas most of the species are plant parasites with a biphasic life cycle and largely strong host preference, some species are recognized solely from their anamorphic phase. In addition, Ustilaginomycotina contains some lineages that parasitize hosts outside the plant kingdom, for example, the mammal-pathogenic genus Malassezia. In this chapter we summarize the most recent systematic studies of Ustilaginomycotina by highlighting the unique characters of monophyletic lineages. Furthermore, evolutionary trends are discussed.