The name Apterygota is sometimes applied to a former subclass of small, agile insects, distinguished from other insects by their lack of wings in the present and in their evolutionary history; notable examples are the silverfish, the firebrat, and the jumping bristletails.

apterygote, broadly, any of the primitive wingless insects, distinct from the pterygotes, or winged insects.

Mar 17, 2017 · What are apterygotes? Learn which arthropods are classified as Apterygota, and what that means.

They are strikingly similar to insects that we recognize today as bristletails. These “most primitive” of all insects are members of the subclass apterygota (from the Greek “a-” meaning without and “pterygo” meaning wing). They are completely wingless and have ametabolous development.

The Apterygota are a small subclass of primitive insects. They are insects which have never had wings at any time in their evolutionary history. Their first known occurrence in the fossil record is in the Rhynie chert of the Devonian period, ~400 million years ago.

May 23, 2018 · Apterygota A subclass of small primitive wingless insects in which metamorphosis is slight or absent. It includes the orders Thysanura and Diplura (bristletails), Collembola (springtails), and Protura. Compare Pterygota. See Hexapoda.

Apterygotes differ from pterygotes in lacking wings and undergoing simple metamorphosis. They differ also in the structure of the thorax and in the development of abdominal appendages.

Most apterygotes live in soil and leaf litter or are associated with plants and rotting logs in moist regions. Collembolans are also found in aquatic environments, caves, permanent ice fields and snow, and insect and animal nests. Moisture is an important ecological factor in habitat selection.

The meaning of APTERYGOTA is a subclass of Insecta comprising primitive insects that are presumed never to have developed wings and have no conspicuous metamorphosis.

The Apterygota, which formerly included the other primitively wingless insects currently placed in the class Entognatha, are now restricted to the two orders Archaeognatha and Zygentoma, which in turn were formerly united as the Thysanura.