Kingdom Protista (Haeckel, 1866) - protists
   1 Phylum Sarcomastigophora Honigberg & Balamuth, 1963
   2 Phylum Labyrinthomorpha - labyrinthomorphans see [unranked] labyrinthulids
   3 Phylum Apicomplexa Levine, 1970 see Infraphylum Apicomplexa Levine, 1970
   4 Phylum Microspora Sprague, 1977 - microsporans see Phylum Microsporida Balbiani, 1882
   5 Phylum Ascetospora Sprague, 1979 - ascetosporans see Class Ascetosporea T. Cavalier-Smith, 2002
   6 Phylum Myxozoa Grassé, 1970, incertae sedis - myxozoans see Subphylum Myxozoa Grassé, 1970
   7 Phylum Ciliophora Doflein, 1901 - ciliates