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
     Superkingdom Metakaryota see Domain Eukaryota Chatton, 1925
       Kingdom Protozoa Goldfuss, 1818 - protozoa
         Subkingdom Dictyozoa Cavalier-Smith, 1991
           Branch Bikonta Cavalier-Smith, 1993
             Infrakingdom Euglenozoa Cavalier-Smith, 1981 [monotypic]
               Phylum Euglenozoa Cavalier-Smith, 1981
                 Subphylum Euglenoida Bütschli, 1884
                   Class Petalomonadea Cavalier-Smith, 1993 [monotypic]
                     Order Petalomonadida Cavalier-Smith, 1993
                       1 Genus Petalomonasᵀ F. Stein, 1859