Rhizopoda Dujardin, 1835 - rhizopods see Phylum Cercozoa Cavalier-Smith, 1998
   Class Lobosea (Carpenter, 1861) Cavalier-Smith, 1993 see Subphylum Lobosa Carpenter, 1861
     Subclass Gymnamoebia (Haeckel, 1862) Cavalier-Smith, 1993 see [unranked] Gymnamoebae
       Order Acanthopodida Page, 1976 [monotypic] see Order Centramoebida Rogerson & Patterson, 2002
         Family Acanthamoebidae Sawyer & Griffin, 1975
           Genus Acanthamoeba Volkonsky, 1931
             Acanthamoeba stevensoni Sawyer, Nerad, Lewis & McLaughlin, 1993