Apterygota

Urine sects or wingless insects ( Apterygota ) is the traditional collective term for fishes, rockhopper, springtails, double dicks and Beintastler. This summary was based on original features such as direct development, the structure of the mouthparts and limbs, and especially due to the lack wings ( " wingless " ) is the scientific name Apterygota expressed. In contrast, there are the flying insects ( pterygota ), which make up the far greater part of the insect fauna. The summary as urine sects was recognized as Paraphylum and is accordingly today in the scheme no longer in use.

Today's system

Of the former urine sects only the little fish and rockhopper be counted among the insects often today. Here they occasionally form a separate subclass parallel to the flying insects, which includes all other insects. However, phylogenetically make the little fish ( Zygentoma ) due to their anchored to two condyles mandible ( dikondyle mandible ), the sister group of flying insects represents the rockhopper form with all together again the Ectognatha ( Freikiefler )

The springtails, double dicks and Beintastler are separate classes of the class Sechsfüßer, they are grouped in the taxon Sackkiefler ( Entognatha ).