Kingdom Protoctista Hogg, 1860 Phylum Myxozoa Grassé, 1970, incertae sedis - myxozoans see Subphylum Myxozoa Grassé, 1970 Class Myxosporea Bütschli, 1881 Order Bivalvulida Shulman, 1959 Suborder Sphaeromyxina Lom & Noble, 1984 [monotypic] Family Sphaeromyxidae Lom & Noble, 1984 1 Genus Sphaeromyxa Thélohan, 1892