Phylum Arthropoda Siebold, 1848 - arthropods
   Subphylum Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
     Class Malacostraca Latreille, 1802
       Subclass Eumalacostraca Grobben, 1892
         Superorder Eucarida Calman, 1904
           Order Amphionidacea D.I. Williamson, 1973 - amphionidaceans
           Order Decapoda Latreille, 1802 - decapods
           Order Euphausiacea Dana, 1852 - krill