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 Reticulofilosa Cavalier-Smith, 1997
           Class Spongomonadea T. Cavalier-Smith, 2000 see Class Imbricatea T. Cavalier-Smith & E.E.-Y. Chao, 2003
             Order Spongomonadida Hibberd, 1984
               1 Genus Rhipidodendron Stein, 1878