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 Euphausiacea Dana, 1852 - krill 1 Family Bentheuphausiidae Colosi, 1917 2 Family Euphausiidae Dana, 1852