Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] 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
                           Subphylum Euglenoidaᵀ Bütschli, 1884
                             [Class Aphageaᵀ Cavalier-Smith, 1993]
                               [Subclass Eugleniaᵀ Cavalier-Smith, 1993]
                                 1 [Order Astasida Ehrenberg, 1838]
                                 2 [Order Eutreptiida Leedale, 1967]
                                 2.0 [Order "Eutreptida" Leedale, 1967] see Order Eutreptiida Leedale, 1967