Phylum Arthropoda Siebold, 1848 - arthropods Superclass Crustacea Pennant, 1777 - crustaceans see [unranked] Crustaceomorpha Chernyshev, 1960 Class Malacostraca Latreille, 1802 Subclass Eumalacostraca Grobben, 1892 Superorder Peracarida Calman, 1904 Order Isopoda Latreille, 1817 - isopods Suborder Gnathiidea Hansen, 1916 1 Family Gnathiidae Leach, 1814