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 Decapoda Latreille, 1802 - decapods
             Suborder Reptantia Boas - walking decapods see Suborder Macrura Reptantia Bouvier, 1917
               Infraorder Anomura MacLeay, 1838
               Infraorder Astacura Borradaile, 1907 see Infraorder Astacidea Latreille, 1802
               Infraorder Brachyura Latreille, 1802 - true crabs
               Infraorder Palinura Latreille, 1802 - palinurid, spiny, and Spanish lobsters see Infraorder Achelata Scholtz & Richter, 1995