What is the Difference Between Apterygota and Pterygota?

The class Insecta is divided into two subclasses: Apterygota and Pterygota, which differ mainly in their wing structure. The key differences between Apterygota and Pterygota are:

1. Wing structure: Apterygota is a subclass of insects that includes wingless insects, while Pterygota is a subclass of insects that includes winged insects.
2. Orders: The Apterygota subclass includes the wingless order Thysanura, while all other insects belong to the Pterygota subclass, even if some of them are wingless through the process of evolution from more primitive ancestors.
3. Morphological differences: In general, Apterygota insects have a simpler body structure compared to Pterygota insects, which possess wings and a more complex body structure.
4. Embryonic development: While all members of the Pterygota have a closed amniotic cavity during embryonic development, this varies within the Apterygota subclass. For example, some Archaeognatha species have a wide open cavity, while others have no amniotic cavity at all.

In summary, Apterygota and Pterygota are two subclasses of insects that differ primarily in their wing structure and related morphological and embryonic development differences. The Apterygota subclass includes wingless insects, while the Pterygota subclass includes winged insects.

Comparative Table: Apterygota vs Pterygota

Here is a table comparing the differences between Apterygota and Pterygota:

Insects belong to the phylum Arthropoda and are the most diverse group of animals. They have a chitinous exoskeleton, a three-part body, three pairs of jointed legs, compound eyes, and one pair of antennae. The class Insecta is divided into two subclasses: Apterygota and Pterygota.