eukaryotes see Domain Eukaryota Chatton, 1925
   Kingdom Protozoa Goldfuss, 1818 [paraphyletic] - protozoa
     Subkingdom Sarcomastigota Cavalier-Smith, 1983 [paraphyletic] see [unranked] dorsates Cavalier-Smith, 2021
       Infrakingdom Opizoa Cavalier-Smith, 2021 [paraphyletic]
         Phylum Opisthosporidia Karpov, Aleoshin & Mikhailov, 2014 [sister group to excluded taxa] see Kingdom Fungi R.T.Moore (1980)
           Subphylum Microsporidia Balbiani, 1892 see Phylum Rozellomycota Doweld (2013)
             1 Class Microsporea Levine & Corliss, 1963 see Class Microsporidea Corliss & Levine, 1963
             2 Class Metchnikovellea Weiser, 1977 see Class Rudimicrosporea Sprague, 1977