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 Difflugiidaeᵀ Wallich, 1864
             Genus Pentagonia Gauthier-Lièvre & Thomas, 1958, nom. illeg.