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Apionidae (weevils; class Insecta, order Coleoptera) Insects very closely related to Curculionidae, but distinguished by having non-elbowed, clubbed antennae. They have highly convex, punctured elytra, 1.5–2.0 mm long; and the head is produced into a long, curved or stout rostrum. The larvae are legless and grub-like, and feed inside seed pods, stems, or plant roots. There are 1060 species.