Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Taphrinomycotina O.E. Erikss. & Winka (1997) - basal ascomycetes 1 Class Neolectomycetes O.E. Erikss. & Winka (1997) 2 Class Pneumocystidomycetes O.E. Erikss. & Winka (1997) 3 Class Schizosaccharomycetes O.E. Erikss. & Winka (1997) - fission yeasts 4 Class Taphrinomycetes O.E. Erikss. & Winka (1997)