Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Saccharomycotina O.E. Erikss. & Winka (1997) [monotypic] - budding yeasts
     Class Saccharomycetes O.E. Erikss. & Winka (1997), nom. inval. [monotypic] see Class Saccharomycetes G.Winter (1880)
       Order Saccharomycetales Luerss. (1877)
         01 Family Ascoideaceae J.Schröt. (1894) [monotypic]
         02 Family Cephaloascaceae L.R. Batra (1973) [monotypic]
         03 Family Debaryomycetaceae Kurtzman & M. Suzuki (2010)
         04 Family Dipodascaceae Engl. & E. Gilg (1924)
         05 Family Lipomycetaceae E.K. Novák & Zsolt (1961)
         06 Family Metschnikowiaceae T. Kamienski (1899)
         07 Family Phaffomycetaceae Y. Yamada, H. Kawas., Nagats., Mikata & T. Seki (1999)
         08 Family Pichiaceae Zender (1925)
         09 Family Saccharomycetaceae G.Winter (1881)
         10 Family Saccharomycodaceae Kudrjanzev (1960)
         11 Family Saccharomycopsidaceae Arx & van der Walt (1987)
         12 Family Trichomonascaceae Kurtzman & Robnett (2007)
         13 Family Trigonopsidaceae Lachance & C.P Kurtzman (2013)
         14 Genus Aciculoconidium D.S. King & S.C. Jong (1976), incertae sedis
         15 Genus Candida Berkhout (1923), nom. cons., incertae sedis
         16 Genus Coccidiascus Chatton (1913), incertae sedis
         17 Genus Conidiascus Holterm. (1898), incertae sedis
         18 Genus Diutina Khunnamw., Jindam., Limtong & Lachance (2015), incertae sedis
         19 Genus Endomyces Reess (1870), incertae sedis
         20 Genus Macrorhabdus Tomasz., Logan, Snowden, Kurtzman & Phalen (2003), incertae sedis
         21 Genus Oosporidium Stautz (1931), incertae sedis
         22 Genus Oscarbrefeldia Holterm. (1898), incertae sedis
         23 Genus Phialoascus Redhead & Malloch (1977), incertae sedis
         24 Genus Selenozyma Yarrow (1977), incertae sedis
         25 Genus Sporopachydermia Rodr. Mir. (1978), incertae sedis