I'm studying for a Zoology exam, please explain me some details.

Thank you:)

Paleo in the name Paleoptera means older or more ancient. The insects grouped under Paleoptera are thought to be more ancient than the other insects which have wing-folding mechanisms, known as the Neoptera. Neo = new. Because the Neoptera evolved wing-folding mechanisms, it sets them apart from the Paleoptera. It is therefore thought that the Neoptera's ancestor(s) is(are) insects in the Paleoptera and the Neoptera evolved wing-folding meachanisms from ancestors that did not have such mechanisms. Without these mechanisms, the wing cannot be folded.

Because they've been extinct for 350 million years?

I'm studying for a Zoology exam, please explain me some details.

Thank you:)