Kingdom Protoctista Hogg, 1860
   Phylum Myxozoa Grassé, 1970, incertae sedis - myxozoans see Subphylum Myxozoa Grassé, 1970
     Class Myxosporea Bütschli, 1881
       Order Multivalvulida Shulman, 1959
         1 Family Trilosporidae Shulman, 1959
         2 Family Kudoidae Meglitsch, 1960 [monotypic]
         3 Family Pentacapsulidae Naidenova & Zaika, 1970 [monotypic] see Family Kudoidae Meglitsch, 1960
         4 Family Hexacapsulidae Shulman, 1959 [monotypic] see Family Kudoidae Meglitsch, 1960
         5 Family Septemcapsulidae Hsieh & Chen, 1984 [monotypic] see Family Kudoidae Meglitsch, 1960