Linker of Apterygotes and pterygotes is

Linker of Apterygotes and pterygotes is Thysanura.
Thysanura is the now deprecated name of what was, for over a century, recognised as an order in the class Insecta. Another name used to separate the two groups from winged insects is Apterygota.
Apterygota and pterygota are two subclasses of insects. Apterygota is a subclass of insects that includes wingless insects, while pterygota is a subclass of insects that includes winged insects.