living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Arthropoda Siebold, 1848 - arthropods
           Subphylum Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
             Subclass Malacostraca Latreille, 1802 see Class Malacostraca Latreille, 1802
               Superorder Peracarida Calman, 1904
                 Order Tanaidacea Dana, 1849 - tanaids
                   Suborder Dikonophora see Suborder Tanaidomorpha Sieg, 1980
                     Family Pseudotanaidae Sieg, 1976
                       1 Subfamily Cryptocopinae Sieg, 1977 see Family Cryptocopidae (Sieg, 1977) Bird & Larsen, 2009
                       2 Subfamily Pseudotanainae (Sieg, 1976) Sieg, 1977 see Family Pseudotanaidae Sieg, 1976
                       3 Genus Cryptocope G.O. Sars, 1882
                       4 Genus Cryptocopoides Sieg, 1976
                       5 Genus Iungentitanais Sieg, 1976
                       6 Genus Paraiungentitanais Sieg, 1977
                       7 Genus Pseudotanais G.O. Sars, 1882