In the classification of Bey-Bienko, the ptérygotes ( Pterygota ) are a subclass of Insecte S with share (in opposition to the Aptérygote S). Ptérygote means “winged” ; The insects ptérygotes are normally winged in an adult state although certain representatives could secondarily become apterous (without wings), after having had winged ancestors.

characteristics:

• Two pairs of wings on the second and the third thoracic segment. These wings can have disappeared during the evolution (a pair at the Diptère S (the other relictuellement present, being often relictuellement transformed into beam or element equilibrator). At other groups, they are both âiles which disappeared (in the working ant), or at Ectoparasite S like the Morpion S, chip S, Pou X (which do not seem any more to need wings. At the Cochineal), only the female is apterous. Certain butterflies female have nothing any more but vestiges of wings.
• Of the metamorphoses during their development and never of posterior moult to the appearance of sexual maturity.

classification

The insects ptérygotes are classified while basing themselves on the structure of the wing nervation and the shape of the wings at rest.

Two principal sections of superorders are identified:

• Paleopteran S
• the Néoptère S

The ptérygotes are divided into a total of 36 S of which 8 are fossil. The 28 orders currently represented are made of normally winged insects although a certain number of them lost their wings during the evolution.

According to the type of formation of the wings and the degree of metamorphosis, the ptérygotes can be divided into two categories:

• the Exoptérygote S,
• the Endoptérygote S.

Compared to the metamorphoses, the winged ptérygotes can be also classified in two quite distinct categories:

• the Holométabole S,
• the Hétérométabole S, themselves subdivided in Paurometabolous S and Hémimétabole S.

External bonds

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