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 Copepoda H. Milne-Edwards, 1840 - copepods
               Order Monstrilloida Sars, 1901
                 Section Cyclopimorpha see Family Thaumatopsyllidae G.O. Sars, 1913
                   Family Thespesiopsyllidae see Family Thaumatopsyllidae G.O. Sars, 1913
                     Genus Thespesiopsyllus C.B. Wilson, 1924 see Genus Thaumatopsyllus G.O. Sars, 1913
                       Thespesiopsyllus paradoxus (G.O. Sars, 1913) see Thaumatopsyllus paradoxus G.O. Sars, 1913