Kingdom Protoctista Hogg, 1860
   Phylum Microspora Sprague, 1977 - microsporans see Phylum Microsporida Balbiani, 1882
     Class Microsporea Levine & Corliss, 1963 see Class Microsporidea Corliss & Levine, 1963
       Order Microsporida Balbiani, 1882
         Suborder Pansporoblastina Tuzet, Maurand, Fize, Michel & Fenwick, 1971
           01 Family Glugeidae Thélohan, 1892
           01.1 Family Pleistophoridae Doflein, 1901
           02 Family Pseudopleistophoridae Sprague, 1977
           03 Family Duboscqiidae Sprague, 1977
           04 Family Thelohaniidae Hazard & Oldacre, 1975
           05 Family Burenellidae Jouvenaz & Hazard, 1978
           06 Family Amblyosporidae Weiser, 1977
           07 Family Culicosporidae Weiser, 1977 see Family Amblyosporidae Weiser, 1977
           08 Family Gurleyidae Sprague, 1977
           09 Family Telomyxidae Léger & Hesse, 1910
           10 Family Tuzetiidae Sprague, Tuzet & Maurand, 1977