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
             Class Ostracoda Latreille, 1802 - ostracods
               Subclass Podocopa Sars, 1866
                 Order Podocopina Sars, 1866 see Order Podocopida (Sars, 1866) G.W. Müller, 1894
                   Superfamily Cytheroidea Baird, 1850
                     Family Hemicytheridae Puri, 1953
                       Genus Poseidonamicus Benson, 1972
                         Poseidonamicus major Benson, 1972