Phylum Arthropoda Siebold, 1848 - arthropods
   Subphylum Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
     Class Maxillopoda Dahl, 1956 see Subphylum Pancrustacea Zrzavý et al., 1997
       Subclass Copepoda H. Milne-Edwards, 1840 - copepods
         Infraclass Neocopepoda Huys & Boxshall, 1991
           Superorder Gymnoplea Giesbrecht, 1882
             Order Calanoida Sars, 1903
               01 Family Acartiidae G.O. Sars, 1903
               02 Family Aetideidae Giesbrecht, 1892
               03 Family Arietellidae G.O. Sars, 1902
               04 Family Augaptilidae G.O. Sars, 1905
               05 Family Bathypontiidae Brodsky, 1950
               06 Family Boholinidae Fosshagen & Iliffe, 1989
               07 Family Calanidae Dana, 1846
               08 Family Candaciidae Giesbrecht, 1893
               09 Family Centropagidae Giesbrecht, 1893
               10 Family Clausocalanidae Giesbrecht, 1893
               11 Family Diaixidae G.O. Sars, 1902
               12 Family Diaptomidae Baird, 1850
               13 Family Discoidae Gordeeva, 1975
               14 Family Epacteriscidae Fosshagen, 1973
               15 Family Eucalanidae Giesbrecht, 1893
               16 Family Euchaetidae Giesbrecht, 1893
               17 Family Fosshageniidae Suárez-Moráles & Iliffe, 1996
               18 Family Heterorhabdidae G.O. Sars, 1902
               19 Family Hyperbionychidae Ohtsuka et al., 1993
               20 Family Lucicutiidae G.O. Sars, 1902
               21 Family Mecynoceridae Andronov, 1973
               22 Family Megacalanidae Sewell, 1947
               23 Family Mesaiokeratidae Matthews, 1961
               24 Family Metridinidae G.O. Sars, 1902, nom. emend.
               25 Family Nullosetigeridae Soh et al., 1999
               26 Family Paracalanidae Giesbrecht, 1893
               27 Family Parapontellidae Giesbrecht, 1893
               28 Family Parkiidae Ferrari & Markhaseva, 1996
               29 Family Phaennidae G.O. Sars, 1902
               30 Family Pontellidae Dana, 1852
               31 Family Pseudocyclopidae Giesbrecht, 1893
               32 Family Pseudocyclopiidae G.O. Sars, 1902
               33 Family Pseudodiaptomidae G.O. Sars, 1902
               34 Family Rhincalanidae Geletin, 1976
               35 Family Ridgewayiidae M.S. Wilson, 1958
               36 Family Ryocalanidae Andronov, 1974
               37 Family Scolecitrichidae Giesbrecht, 1893
               38 Family Spinocalanidae Vervoort, 1951
               39 Family Stephidae G.O. Sars, 1902
               40 Family Sulcanidae Nicholls, 1945
               41 Family Temoridae Giesbrecht, 1893
               42 Family Tharybidae G.O. Sars, 1902
               43 Family Tortanidae G.O. Sars, 1902