[living organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryota Whittaker & Margulis, 1978 see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Bilateria Hatschek, 1888 - bilaterians
         Infrakingdom Protostomia Grobben, 1908
           Superphylum Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake, 1997
             Phylum Nematoda Gegenbaur, 1859 - round worms
               Class Enoplea Inglis, 1983
                 Subclass Enoplia Pearse, 1942
                   1 Order Alaimida Siddiqi, 1983
                   2 Order Enoplida Filipjev, 1929
                   3 Order Ironida Hodda, 2007
                   4 Order Rhaptothyreida Tchesunov, 1997
                   5 Order Trifusiida see Order Trefusiida Lorenzen, 1981
                   6 Order Tripyloidida Hodda, 2007