What are the main groups of insects?

Insects are the most diverse group of animals. With more than a million described species and estimates of the total number of types up to 30 million, insects are between half and 90% of all animal diversity. This is all the more impressive, because insects are not even animal phylum, they are just a class in Phylum Arthropoda. The oldest known insect fossil is rhyniognatha hirsti of Devonian, about 396 million years. Since then, the insects have been diversified, especially since the formation of flowering plants about 125 million years ago. Together with the order of thysanura (Silverfish), these two orders are the only two inside the insect class that are without wings. Other animals without a wing previously classified as insects such as springs, proturans and diplorans are now considered the basic lines except insects and are Inst.Ead placed in their own class, ENTOGNATHA. Previously, all these animals were called Apterygot, which means "without wings".

All other insects have wings that are part of the subclass of Pterygot. Previously, Pterygota was divided into infraClasses Palaeopter, or "old wing" and neopter or "new wing", but now these categories are paraphyletic. This means that Infraklasses do not have to be exclusive descendants of a common ancestor, and therefore not real. However, categorization can be useful as a reference to the type of body. Palaeoptera consists of insects that lack the ability to fold the wings back over their belly, while neopterans can. The fossil record for Palaeopter is extensive, but today the group includes only two surviving commands: Mayflies and Dragonflies. Most other insects are neopterans.

Neoptera is a huge group that contains32 orders, five of which are extinct. These orders are pre -placed in seven superiors based on physiological characteristics and suspicion of a common predecessor. Among the members of the neoptera paThree webspinners, angel insects, Earwigs, grasshoppers, rod insects, ice creams, gladiators, cockroaches, thermites, mantides, brochures, pipes, lice, right bugs, bees, wasps, rays, torn, torn wings, clean, network, network, network, net Insonets, network, network, clean insopes, clean insopes, clean insopes, clean insopes, clean insocts, clean insopes, Indersfless, thrips, thrips, thrips. Scorpionflies, fleas, snow fleas, flies, caddisflies, butterflies and moths.