Phylum Amoebozoa Lühe, 1913
   Subphylum Lobosa Carpenter, 1861 see Infraphylum Lobosa Carpenter, 1861
     Class Discosea Cavalier-Smith, 2004
       Subclass Longamoebia Cavalier-Smith & Smirnov, 2011
         Order Thecamoebida Smirnov & Cavalier-Smith, 2011 [monotypic]
           Family Thecamoebidae Schaeffer, 1926
             Genus Sappinia Dangeard, 1896
               Sappinia diploidea (Hartmann & Naegler, 1908) Alexeieff, 1912