Kingdom Animalia (animals) Eumetazoa (metazoans) Bilateria (bilaterally symmetrical animals) Protostomia (protostomes) Ecdysozoa Arthropoda (arthropods) Hexapoda Class Insecta (insects) Order Hemiptera Superfamily Notonectoidea Family Notonectidae (backswimmers) Family Pleidae (pleid water bugs, pygmy backswimmers)
