Yeast taxonomy, or yeast classification (see yeast) is based on the following hierarchical system:

Subdivisions: eg Ascomycotina (male), Basidiomycotina (female) or Deuteromycotina (neuter).

Families: eg Saccharomycetaceae

Subfamilies: eg Saccharomycetoideae

Genera: eg Saccharomyces

Species: eg cerevisiae

Bibliography

Graham M Walker, Yeast Physiology and Biotechnology, Wiley, 1998, p1.