Phylum Arthropoda Siebold, 1848 - arthropods
Status: extant; Count: -
   Subphylum Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
  Status: extant; Count: [f] 6c;47o;849f
     Class Maxillopoda Dahl, 1956 see Subphylum Pancrustacea Zrzavý et al., 1997
    Status: extant; Count: [f] 22o;283f
       Subclass Copepoda H. Milne-Edwards, 1840 - copepods
      Status: extant; Count: [f] 10o;220f
         Infraclass Neocopepoda Huys & Boxshall, 1991
        Status: extant; Count: [f] 9o;219f
           Superorder Podoplea Giesbrecht, 1882
          Status: extant; Count: [f] 8o;176f
             Order Harpacticoida Sars, 1903
            Status: extant; Count: [f] 54f
               Family Rhizothricidae Por, 1986
              Status: extant; Count: -