Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Class Schizosaccharomycetes O.E. Erikss. & Winka (1997) - fission yeasts
     Order Schizosaccharomycetales O.E. Erikss. et al. (1993)
       1 Family Schizosaccharomycetaceae Beij. ex Klöcker (1905)