Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               [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 Metchnikovellea Weiser, 1977] see Class Rudimicrosporea Sprague, 1977
                         2 [Class Microsporeaᵀ Levine & Corliss, 1963] see Class Microsporidea Corliss & Levine, 1963