[Kingdom] Animalia Linnaeus, 1758 - animals Grade Enterozoa Grade Cœlomata Phylum Appendiculata {Lankester} Branch Gnathopoda Straus-Durkheim, 1829 Grade Condylopoda Class Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777 Grade Entomostraca Order Branchiopoda Latreille, 1817 Genus Apus Cuvier, 1798, nom. nud. see Genus Triops Schrank, 1803