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 Ascothoracida Lacaze-Duthiers, 1880
           Order Laurida Grygier, 1987
             1 Family Lauridae Gruvel, 1905
             2 Family Petrarcidae Gruvel, 1905
             3 Family Synagogidae Gruvel, 1905