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 Minisporida Sprague, 1972 see Order Chytridiopsida Weiser, 1974
         1 Family Chytridiopsidae Sprague, Ormières & Manier, 1972
         2 Family Hesseidae Ormières & Sprague, 1973
         3 Family Burkeidae Sprague, 1977
         4 Family Buxtehudeidae Larsson, 1980