Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Hexapoda

Class: Insecta

Apterygota

* Monura †

Monocondylia

* Archaeognatha=Microcoryphia (bristletails)

Dicondylia

Thysanura=Zygentoma (silverfish)

Pterygota

Paleoptera

* Ephemeroptera (mayflies)
* Palaeodictyoptera †
* Megasecoptera †
* Archodonata †
* Diaphanopterodea †
* Protodonata=Meganisoptera †
* Protanisoptera †
* Triadophlebioptera †
* Protozygoptera=Archizygoptera †
* Odonata (dragonflies, damselflies)

Neoptera

Polyneoptera

* Caloneurodea †
* Titanoptera †
* Protorthoptera †
* Plecoptera (stoneflies)
* Embiidina =Embioptera (webspinners)
* Zoraptera (angel insects)
* Dermaptera (earwigs)
* Orthoptera (grasshoppers, crickets, katydids)
* Phasmatodea (stick insects)
* Notoptera (ice-crawlers & gladiators)
* Blattaria (cockroaches)

* Isoptera (termites - included in Blattaria)

* Mantodea (mantids)

Paraneoptera

* Psocodea (booklice, barklice)

* Mallophaga (chewing lice - in Psocodea)
* Anoplura (sucking lice - in Psocodea)

* Thysanoptera (thrips)
* Hemiptera (true bugs, aphids, cicadas)

Endopterygota =Holometabola

* Glosselytrodea †
* Miomoptera †
* Hymenoptera (wasps, bees, ants)
* Coleoptera (beetles)
* Strepsiptera (twisted-winged parasites)

Neuropterida

* Raphidioptera (snakeflies)
* Megaloptera (alderflies, dobsonflies)
* Neuroptera (lacewings, antlions)

Antliophora/Mecopteroidea

* Mecoptera (scorpionflies, hangingflies)

* Siphonaptera (fleas - in Mecoptera)

* Diptera (true flies)
* Protodiptera †

Amphiesmenoptera

* Trichoptera (caddisflies)
* Lepidoptera (butterflies, moths, skippers)

 

† - Designated as extinct