After Parker, 1982, with some familes from Martin & Davis, 2001

<==o Calanoida Sars, 1903 (keijuhankajalkaiset)
   |?- Boholinidae Fosshagen & Iliffe, 1989
   |?- Clausocalanidae Giesbrecht, 1893 [from Martin & Davis, 2001, not recognized by Parker, 1982]
   |?- Fosshageniidae Suárez-Moráles & Iliffe, 1996
   |?- Hyperobionychidae Ohtsuka, Roe & Boxshall, 1993
   |?- Mecynoceridae Andronov, 1973 [from Martin & Davis, 2001, not recognized by Parker, 1982]
   |?- Nullosetigeridae Soh, Ohtsuka, Imbayashi & Suh, 1999
   |?- Parkiidae Ferrari & Markhaseva, 1996
   |?- Rhincalanidae Geletin, 1976 [from Martin & Davis, 2001, not recognized by Parker, 1982]
   |?- Ryocalanidae Andronov, 1974 [from Martin & Davis, 2001, not recognized by Parker, 1982]
   |?- Sulcanidae Nicholls, 1945 [from Martin & Davis, 2001, not recognized by Parker, 1982]
   |--o AMPHASCANDRIA
   |  |-- Calanidae Dana, 1846
   |  |-- Eucalanidae Giesbrecht, 1893
   |  |-- Megacalanidae Sewell, 1947
   |  |-- Paracalanidae Giesbrecht, 1893
   |  |-- Calocalanidae
   |  |-- Pseudocalanidae
   |  |-- Spinocalanidae Vervoort, 1951
   |  |-- Aetideidae Giesbracht, 1893
   |  |-- Euchaetidae Giesbrecht, 1893
   |  |-- Phaennidae Sars, 1902
   |  `-- Scolecithricidae Giesbrecht, 1893
   |--o ISOKERANDRIA
   |  |-- Diaixidae Sars, 1902
   |  |-- Mesaiokeratidae Matthews, 1961
   |  |-- Stephidae Sars, 1902
   |  |-- Tharybidae Sars, 1902
   |  |-- Platycopiidae Sars, 1911
   |  `-- Pseudocyclopiidae Sars, 1902 [homonymous with Pseudocyclopidae Giesbrecht, 1893??]
   `--o HETERARTHRANDRIA
      |-- Temoridae Giesbrecht, 1893
      |-- Metridinidae Sars, 1902
      |-- Centropagidae Giesbrecht, 1893
      |-- Diaptomidae Baird, 1850
      |-- Pseudodiaptomidae Sars, 1902
      |-- Lucicutiidae Sars, 1902
      |-- Heterorhabdidae Sars, 1902
      |-- Augaptilidae Sars, 1905
      |-- Discoidae Gordejeva, 1975
      |-- Arietellidae Sars, 1902
      |-- Epacteriscidae Fosshagen, 1973
      |-- Phyllopidae
      |-- Pseudocyclopidae Giesbrecht, 1893
      |-- Ridgewayiidae Wilson, 1958
      |-- Candaciidae Giesbrecht, 1893
      |-- Pontellidae Dana, 1852
      |-- Parapontellidae Giesbrecht, 1893
      |-- Bathypontiidae Brodsky, 1950
      |-- Acartiidae Sars, 1900
      `-- Tortanidae Sars, 1902

Reference(s):