[Kingdom] Animalia Linnaeus, 1758 - animals Grade Enterozoa Grade Cœlomata Phylum Appendiculata {Lankester} Branch Gnathopoda Straus-Durkheim, 1829 Grade Condylopoda Class Insecta Hexapoda Grade Masticantia Order Coleoptera Linnaeus, 1758 - beetles Genus Dystiscus Donovan, 1811, nom. null. see Genus Dytiscus Linnaeus, 1758