According to Lodder(1984),many of the Saccharomyces have been reclassified.for example,S.cerevisiae,S.fragilis is now Kluyveromyces marxianus,and S.lactis is now K.marxianus Var.lactis.S.rouxii,S.mellis,and S.nussbaumeri are now Zygosaccharomyces rouxii.Debaryomyces kloeckeri is now D.hansenii.