Kingdom Protozoa Goldfuss, 1818 - protozoa
   Subkingdom Gymnomyxa (Lankester, 1878) Cavalier-Smith, 2002 see Kingdom Protozoa Goldfuss, 1818
     Infrakingdom Sarcomastigota Cavalier-Smith, 1983 see Subkingdom Sarcomastigota Cavalier-Smith, 1983
       Phylum Amoebozoa Lühe, 1913
         Subphylum Lobosa Carpenter, 1861 see Infraphylum Lobosa Carpenter, 1861
           Genus Hartmannella Alexeieff, 1912
             Hartmannella vermiformis Page, 1967 see Vermamoeba vermiformis (Page, 1967)