Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade discaria Cavalier-Smith, 2021
                 Clade natates Cavalier-Smith, 2021
                   Clade photaria Cavalier-Smith, 2021
                     Clade Discoba Simpson 2009
                       Superphylum Discicristata Cavalier-Smith, 1998 [coordinate rank]
                         Phylum Euglenozoa Cavalier-Smith, 1981
                           Class Euglenoidea Bütschli, 1884
                             Order Euglenidaᵀ Bütschli, 1884 - euglenids
                               Suborder Eugleninaᵀ Bütschli, 1884
                                 Family Euglenidaeᵀ Stein, 1878
                                   Genus Euglenaᵀ C.G. Ehrenberg, 1830
                                     Euglena caudata Huber