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 Thecostraca Gruvel, 1905 - barnacles
         Infraclass Cirripedia Burmeister, 1834 - barnacles
           Superorder Rhizocephala Müller, 1862
             Order Kentrogonida Delage, 1884
               1 Family Lernaeodiscidae Boschma, 1928
               2 Family Peltogastridae Lilljeborg, 1860
               3 Family Sacculinidae Lilljeborg, 1860