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 see Order Centramoebida Rogerson & Patterson, 2002
       Family Acanthamoebidae Sawyer & Griffin, 1975
         Genus Protacanthamoeba F.C. Page, 1981