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 Harpacticoida Sars, 1903
                 01 Family Aegisthidae W. Giesbrecht, 1892
                 02 Family Balenophilidae see Family Balaenophilidae G.O. Sars, 1910
                 03 Family Chappuisiidae Chappuis, 1940
                 04 Family Darcythompsoniidae Lang, 1936
                 05 Family Geleyellidae see Family Gelyellidae Rouch & Lescher-Moutoué, 1977
                 06 Family Latiremidae Bozic, 1969
                 07 Family Longipediidae G.O. Sars, 1903
                 08 Family Louriniidae Monard, 1927
                 09 Family Metidae G.O. Sars, 1910
                 10 Family Miracidae see Family Miraciidae Dana, 1846
                 11 Family Neobradyidae Olofsson, 1917
                 12 Family Parastenhelliidae see Family Parastenheliidae Lang, 1936
                 13 Family Parastenocaridae see Family Parastenocarididae Chappuis, 1933
                 14 Family Phyllognathopodidae Gurney, 1932
                 15 Family Porcellidiidae Boeck, 1865
                 16 Family Pseudopeltidiidae Poppe, 1891 see Family Clytemnestridae A. Scott, 1909
                 17 Family Tegastidae G.O. Sars, 1904
                 18 Family Ameiridae Monard, 1927
                 19 Family Ancorbolidae nom. null. see Family Ancorabolidae G.O. Sars, 1909
                 20 Family Canthocamptidae G.O. Sars, 1906
                 21 Family Canuellidae K. Lang, 1944
                 22 Family Cerviniidae G.O. Sars, 1903 see Family Aegisthidae W. Giesbrecht, 1892
                 23 Family Cletodidae T. Scott, 1905
                 24 Family Cylindropsyllidae G.O. Sars, 1909
                 25 Family Diosaccidae G.O. Sars, 1906 see Family Miraciidae Dana, 1846
                 26 Family Ectinosomitidae nom. null. see Family Ectinosomatidae G.O. Sars, 1903
                 27 Family Harpacticidae Dana, 1846
                 28 Family Laophontidae T. Scott, 1905
                 29 Family Paramesochridae Lang, 1944
                 30 Family Peltidiidae G.O. Sars, 1904
                 31 Family Tachidiidae Boeck, 1865
                 32 Family Tetragonicipitidae Lang, 1944
                 33 Family Thalestridae G.O. Sars, 1905
                 34 Family Tisbidae Stebbing, 1910