life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Empire Eukaryota (Chatton, 1925) see Domain Eukaryota Chatton, 1925
     Kingdom Protozoa Goldfuss, 1818 [paraphyletic] - protozoa
       Subkingdom Neozoa Cavalier-Smith, 1993 [paraphyletic] see Kingdom Protozoa Goldfuss, 1818
         Infrakingdom Discicristata Cavalier-Smith, 1998 see Superphylum Discicristata Cavalier-Smith, 1998
           Phylum Euglenozoa Cavalier-Smith, 1981
             Subphylum Plicostoma Patterson, 1988 ex T. Cavalier-Smith, 1998 see Phylum Euglenozoa Cavalier-Smith, 1981
               Superclass Euglenoida Bütschli, 1884 see Class Euglenoidea Bütschli, 1884
                 Genus Euglena C.G. Ehrenberg, 1830