Many of these primitive insects are restricted to rocky shorelines.

Nicoletiidae is a family of primitive insects belonging to the order Thysanura.

The young of primitive insects, such as silverfish, which develop only in size and sexual maturity, are simply called young.

They are grazed upon by springtails, primitive insects of the Collembola order.

Ctenolepisma lineata is a primitive insect of the order Thysanura.

The Apterygota are a small subclass of primitive insects.

They're primitive insects - they existed millions of years before dinosaurs did and have evolved very little since then.

Dilta is a genus of primitive insects belonging to the family Machilidae.

Similar structures are found in the most primitive insects.