Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
   [crown] Amorphea Adl et al. 2012, nom. cl. inval. see Clade Amorphea Adl et al. 2012 [Simpson, Medina & Adl 2020]
     Supergroup Amoebozoa Lühe, 1913 see Phylum Amoebozoa Lühe, 1913
       Tubulinea Smirnov et al., 2005 see Class Tubulinea Smirnov et al., 2005
         Arcellinida Kent, 1880 see Order Arcellinida Kent, 1880
           Difflugina Meisterfeld, 2002 see Suborder Difflugiina R. Meisterfeld, 2002
             01 Genus Bullinularia Deflandre, 1953
             02 Genus Centropyxis Stein, 1857
             03 Genus Difflugia Leclerc, 1815
             04 Genus Distomatopyxis Bonnet, 1970
             05 Genus Heleoptera see Genus Heleopera Leidy, 1879
             06 Genus Hyalosphenia Stein, 1859
             07 Genus Lesquereusia Schlumberger, 1845
             08 Genus Nebela Leidy, 1874
             09 Genus Paraquadrula Deflandre, 1932
             10 Genus Pontigulasia Rhumbler, 1896
             11 Genus Plagiopyxis Penard, 1910
             12 Genus Quadrulella Cockerell, 1909
             13 Genus Trigonopyxis Penard, 1912