Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Saccharomycotina O.E. Erikss. & Winka (1997) - budding yeasts Class Saccharomycetes G.Winter (1880) Order Saccharomycetales Luerss. (1877) Family Saccharomycodaceae Kudrjanzev (1960) ?Genus Nadsonia Syd. (1912)