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
                     01 Family Australocytherideidae Hartmann, 1980
                     02 Family Bonaducecytheridae McKenzie, 1977
                     03 Family Bythocytheridae Sars, 1866
                     04 Family Cushmanideidae Puri, 1974
                     05 Family Cytherettidae Triebel, 1952
                     06 Family Cytheridae Baird, 1850
                     07 Family Cytherideidae Sars, 1925
                     08 Family Cytheromatidae Elofson, 1939
                     09 Family Cytheruridae Müller, 1894
                     10 Family Entocytheridae Hoff, 1942
                     11 Family Eucytheridae Puri, 1954
                     12 Family Hemicytheridae Puri, 1953
                     13 Family Kliellidae Schäfer, 1945
                     14 Family Krithidae Mandelstam, 1958
                     15 Family Leptocytheridae Hanai, 1957
                     16 Family Limnocytheridae Klie, 1938
                     17 Family Loxoconchidae Sars, 1925
                     18 Family Microcytheridae Klie, 1938
                     19 Family Neocytherideidae Puri, 1957
                     20 Family Osticytheridae Hartmann, 1980
                     21 Family Paracytheridae Puri, 1974 see Family Paradoxostomatidae Brady & Norman, 1889
                     22 Family Paracytherideidae Puri, 1957 see Family Cytheridae Baird, 1850
                     23 Family Paradoxostomatidae Brady & Norman, 1889
                     24 Family Parvocytheridae Hartmann, 1959
                     25 Family Psammocytheridae Klie, 1938
                     26 Family Pseudolimnocytheridae
                     27 Family Trachyleberididae Sylvester-Bradley, 1948
                     28 Family Xestoleberidae Sars, 1928 see Family Xestoleberididae Sars, 1928