Domain Eucaryota
   Subdomain Amoebota Doweld (2001)
     Kingdom Mucorobiota Doweld (2001)
       Subkingdom Tuberobiotina Doweld (2001)
         Phylum Tuberomycota Doweld (2001)
           Subphylum Schizosaccharomycotina Doweld (2001)
             Class Pneumocystidomycetes O.E. Erikss. & Winka (1997)