Division Opisthokonta Cavalier-Smith, 1987 see Clade Opisthokonta Cavalier-Smith 1987, nom. cl. inval.
   Superkingdom Holomycota Liu, Steenkamp, Brinkmann, Forget, Philippe & Lang, 2009
     Kingdom Fungi R.T.Moore (1980) - fungi
       Subkingdom Rozellomyceta Tedersoo, Sánchez-Ramírez, Kõljalg, Bahram, M. Döring, Schigel, T.W. May, M. Ryberg & Abarenkov (2018) [monotypic]
         Phylum Rozellomycota Doweld (2013) [monotypic]
           Subphylum Rozellomycotina Tedersoo, Sánchez-Ramírez, Kõljalg, Bahram, M. Döring, Schigel, T.W. May, M. Ryberg & Abarenkov (2018) see Phylum Rozellomycota Doweld (2013)
             Class Microsporidea Corliss & Levine, 1963