After Parker, 1982 and Martin & Davis, 2001

Alternative taxonomy after Parker, 1982

Alternative phylogeny after “The Tree of Life”

<==o Copepoda Milne-Edwards, 1840
   |--o Progymnoplea Lang, 1948
   |  `--o Platycopioida Fosshagen, 1985
   |     `--o Platycopiidae Sars, 1911
   |        |-- Platycopia
   |        |-- Nanocopia
   |        |-- Sarsicopia
   |        `-- Antrisocopia
   `--o Neocopepoda Huys & Boxshall, 1991
      |--o Gymnoplea Giesbrecht, 1882
      |  `-- Calanoida Sars, 1903 (keijuhankajalkaiset)
      `--o Podoplea Giesbrecht, 1882
         |--o Misophrioida Gurney, 1933
         |  |-- Spaleophriidae Boxshall & Jaume, 2000
         |  `--+-- Misophriidae Brady, 1878
         |     `-- Palpophriidae Boxshall & Jaume, 2000
         |-- Cyclopoida Burmeister, 1834 (kyklooppiäyriäiset)
         |-- Gelyellidae Rouch & Lescher-Moutoué, 1977 [Gelyelloida Huys, 1988]
         |-- Mormonillidae Giesbrecht, 1893 [Mormonilloida Boxshall, 1979]
         |-- Harpacticoida Sars, 1903 (ryömijähankajalkaiset)
         |-- Poecilostomatoida Thorell, 1859
         |-- Siphonostomatoida Thorell, 1859 [incl. Caligoida]
         `-- Monstrillidae Dana, 1849 [incl. Thespesiopsyllidae??] [Monstrilloida Sars, 1901] (aaveäyriäiset)


Reference(s):