What is the classification for insects like silverfish and firebrats?

The classification of insects like silverfish and firebrats as primitive insects is correct because they belong to the order Thysanura, which is characterized as one of the oldest groups of insects. These insects have several features that distinguish them from more evolved insect groups, including their simpler body structures and lack of wings.

Primitive insects are typically wingless, have long antennae, and undergo a simple form of development known as ametabolous development, meaning they do not have a distinct larval stage. Instead, they gradually grow into adults without undergoing a metamorphosis. In contrast to scavenger or chewing insects, silverfish and firebrats primarily feed on materials such as starches and cellulose, which aligns more closely with their role as primitive insects rather than fitting neatly into the classifications of scavenger or chewing insects. Additionally, they do not possess wings, eliminating the possibility of them being classified as winged insects.