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 Calanoida Sars, 1903
                 Suborder Amphascandria see Order Calanoida Sars, 1903
                   01 Family Calanidae Dana, 1846
                   02 Family Eucalanidae Giesbrecht, 1893
                   03 Family Megacalanidae Sewell, 1947
                   04 Family Paracalanidae Giesbrecht, 1893
                   05 Family Calocalanidae Bernard, 1958
                   06 Family Pseudocalanidae see Family Clausocalanidae Giesbrecht, 1893
                   07 Family Spinocalanidae Vervoort, 1951
                   08 Family Aetideidae Giesbrecht, 1892
                   09 Family Euchaetidae Giesbrecht, 1893
                   10 Family Phaennidae G.O. Sars, 1902
                   11 Family Scolecithricidae Giesbrecht see Family Scolecitrichidae Giesbrecht, 1893