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 Pleocyemata Burkenroad, 1963
               1 Infraorder Stenopodidea Claus, 1872
               2 Infraorder Caridea Dana, 1852 - caridean and procaridean shrimps
               3 Infraorder Astacidea Latreille, 1802 - crayfish and chelate lobsters
               4 Infraorder Thalassinidea Latreille, 1831 - mud and ghost shrimps
               5 Infraorder Palinura Latreille, 1802 - palinurid, spiny, and Spanish lobsters see Infraorder Achelata Scholtz & Richter, 1995
               6 Infraorder Anomura MacLeay, 1838
               7 Infraorder Brachyura Latreille, 1802 - true crabs