[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Appendiculata {Lankester}
         Branch Gnathopoda Straus-Durkheim, 1829
           Grade Condylopoda
             I Class Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
             II Class Insecta Hexapoda
             III Class Insecta Myriapoda
             IV Class Arachnida Lamarck, 1801