Phylum Arthropoda Siebold, 1848 - arthropods
   Subphylum Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
     Class Copepoda H. Milne-Edwards, 1840 see Subclass Copepoda H. Milne-Edwards, 1840
       Order Calanoida Sars, 1903
       Order Cyclopoida Sars, 1886
       Order Harpacticoida Sars, 1903
       Order Misophrioida Gurney, 1933
       Order Monstrilloida Sars, 1901
       Order Mormonilloida Boxshall, 1979
       Order Platycopioida Fosshagen, 1985
       Order Poecilostomatoida Thorell, 1859
       Order Siphonostomatoida Thorell, 1859