Kingdom Animalia Linnaeus, 1758 - animals
   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
                 Infraorder Astacidea Latreille, 1802 - crayfish and chelate lobsters
                   Genus Astacus Fabricius, 1775
                   Genus Cambarus Erichson, 1846
                   Genus Homarus Weber, 1795