• Hexapoda (superclass) - insects
  • Diplura (order)
  • Elliplura
    • Colembola (order) - Springtails
    • Protura (order)
  • Insecta (class) - true insects
    • Archaeognatha (order) - Bristletails
    • Dicondylia
      • Zygentoma (order) - Silverfish, Firebrats
      • Pterygota - winged insects
        • Palaeoptera (infraclass)
          • Ephemeroptera (order) - Mayflies
          • Odonata (order) - Dragonflies, Damselflies
        • Neoptera (infraclass)
          • Embioptera (order) - web spinners
          • Plecoptera (order) - stoneflies
          • Paraneoptera
            • Hemiptera (order) - cicadas, hoppers, aphids
            • Phthiraptera (order) - lice
            • Psocoptera (order) - booklice, barklice
            • Thysanoptera (order) - thrips
          • Orthopteroidea
            • Dermaptera (order) - earwigs
            • Phasmatodea (order) - walking sticks
            • Grylloblattodea (order) - few species
            • Orthoptera (order) - grasshoppers, locusts, crickets, katydids
            • Dictyoptera
              • Blattaria (order) - cockroaches
              • Isoptera (order) - termites
              • Mantodea (order) - mantids
          • Endopterygota
            • Coleoptera (order) - beetles
            • Diptera (order) - flies
            • Hymenoptera (order) - ants, bees, wasps
            • Mecoptera (order) - scorpionflies and hangingflies
            • Siphonaptera (order) - fleas
            • Strepsiptera (infraorder)
            • Amphiesmenoptera
              • Lepidoptera (order) - butterflies, moths
              • Trichoptera (order) - caddisflies
            • Neuropterida
              • Megaloptera (order) - dobsonflies, fishflies, adderflies
              • Neuroptera (order) - lacewings, ant lions
              • Raphidioptera (order) - snakeflies