[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Plastidozoa [monotypic]
     [Phylum] Protozoa (Goldfuss, 1818) C.T. von Siebold, 1854 see Kingdom Protozoa Goldfuss, 1818
       Grade Gymnomyxa
         Class Gymnomyxa
           Order Amœboidea
             1 Genus Arcella Ehrenberg, 1830
             2 Genus Pelomyxa Greeff, 1874
             3 Genus Amœba Bory de St. Vincent, 1822