Kingdom Protoctista Hogg, 1860
   Phylum Myxozoa Grassé, 1970, incertae sedis - myxozoans see Subphylum Myxozoa Grassé, 1970
     Class Myxosporea Bütschli, 1881
       Order Multivalvulida Shulman, 1959
         Family Hexacapsulidae Shulman, 1959 [monotypic] see Family Kudoidae Meglitsch, 1960
           1 Genus Hexacapsula Arai & Matsumoto, 1953 see Genus Kudoa Meglitsch, 1947