organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain eukaryotes see Domain Eukaryota Chatton, 1925
     amoeboid protists
       Order Arcellinida Kent, 1880 - shelled lobosid amebas
         Suborder Difflugina R. Meisterfeld, 2000[2002] see Suborder Difflugiina R. Meisterfeld, 2002
           01 Family Difflugiidaeᵀ Wallich, 1864
           02 Family Centropyxidae Jung, 1942
           03 Family Trigonopyxidae Loeblich & Tappan, 1964
           04 Family Lamtopyxidae Bonnet, 1974
           05 Family Distomatopyxidae Bonnet, 1970
           06 Family Plagiopyxidae Bonnet & Thomas, 1960
           07 Family Paraquadrulidae Deflandre, 1953
           08 Family Lesquereusiidae Jung, 1942
           09 Family Hyalospheniidae Schultze, 1877
           10 Family Heleoperidae Jung, 1942
           11 Family Nebelidae Taranek, 1882