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
           Family Plagiopyxidae Bonnet & Thomas, 1960
             1 Genus Protoplagiopyxis Bonnet, 1962
             2 Genus Plagiopyxis Penard, 1910
             3 Genus Geoplagiopyxis Chardez, 1961
             4 Genus Paracentropyxis Bonnet, 1960
             5 Genus Bullinularia Deflandre, 1953
             6 Genus Hoogenraadia Gauthier-Lièvre & Thomas, 1958
             7 Genus Planhoogenraadia Bonnet, 1977