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 Brachyura Latreille, 1802 - true crabs
                 Section Eubrachyura de Saint Laurent, 1980
                   Subsection Thoracotremata Guinot, 1977
                     Superfamily Grapsoidea MacLeay, 1838
                       Family Plagusiidae Dana, 1851