Class Lobosea (Carpenter, 1861) Cavalier-Smith, 1993 see Subphylum Lobosa Carpenter, 1861
   Subclass Gymnamoebia (Haeckel, 1862) Cavalier-Smith, 1993 see [unranked] Gymnamoebae
     Order Euamoebida Lepşi, 1960
       Family Thecamoebidae Schaeffer, 1926
         Genus Pseudothecamoeba Page, 1988
           Pseudothecamoeba proteoides (Page, 1976) Page, 1988