Arthropoda Siebold, 1848 - arthropods [Euarthropoda] Class Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777 Genus †Martinssonia Müller & Walossek, 1986 †Martinssonia elongata K.J. Müller & D. Walossek, 1986