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“elytra”
elytra (plural)
1. Tough front wings, occurring in pairs on beetles and some other insects, that act as a protective covering for the rear wings.
2. Part of the hard exoskeleton of certain insects; such as, scarab beetles.
2. Part of the hard exoskeleton of certain insects; such as, scarab beetles.

An example of an insect with elytra. A Cockchafer or "May Bug", a European beetle of the family of the dung beetles from Wikipedia.
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elytro-, elytr-, elytri- +
(page 1)