- 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