Kingdom Protozoa Goldfuss, 1818 - protozoa
   Subkingdom Gymnomyxa (Lankester, 1878) Cavalier-Smith, 2002 see Kingdom Protozoa Goldfuss, 1818
     Infrakingdom Rhizaria Cavalier-Smith, 2002
       Phylum Cercozoa Cavalier-Smith, 1998
         Subphylum Endomyxa T. Cavalier-Smith, 2002
           Class Phytomyxea Engler & Prantl, 1897
             Genus Plasmodiophora Woronin, 1878
               Plasmodiophora brassicae Woronin, 1877