Many beetles have specialized lifestyles, in that they feed on only one kind of plant.
These have a habit as larvae of wrapping themselves in the curled leaves of various tropical plants and eating the inside of the leafy tube. Very distinctive chew marks are left when the leaf is unfurled. Each species of beetle prefers a single species of plant. The earliest known body fossils of hispine beetles are from the Middle Eocene, and there are no body fossils of rolled-leaf beetles. These leaf fossils show damage nearly identical to those marks left by modern rolled-leaf beetles.