Chrysomelidae

Definition

A very large family of beetles (order Coleoptera) comprising the leaf beetles, characterized by herbivorous larvae and adults that feed on living plant tissue—especially leaves, though many mine stems, roots, or seeds. With over 37,000 described species in more than 2,500 genera, Chrysomelidae is among the most diverse beetle families and a dominant herbivore group in most terrestrial ecosystems. Adults typically have a compact, often convex body with antennae shorter than the body, and many species exhibit striking metallic or aposematic coloration. The family includes significant agricultural pests (e.g., Colorado potato beetle, cucumber beetles) as well as biological control agents.

Etymology

From Chrysomela (type genus, Greek 'chrysos' gold + 'melas' black, referring to coloration of some species) + -idae (family suffix).

Example

The subfamily Galerucinae includes the striped cucumber beetle (Acalymma vittatum), a major pest of cucurbits whose larvae feed on roots and adults transmit bacterial wilt; the tortoise beetles of subfamily Cassidinae have expanded elytra that form a shield covering the body and legs.

Synonyms

• Leaf Beetles

Related Terms

• Coleoptera
• Phytophaga
• Cassidinae
• Galerucinae
• Criocerinae
• herbivory
• host-plant specialization
• metallic coloration
• Bruchinae

Usage Notes

Sometimes split in older literature, with Bruchinae (seed beetles, bean weevils) treated as a separate family Bruchidae; modern phylogenetics places Bruchinae firmly within Chrysomelidae. The common name 'leaf beetle' is broadly applied to the family, though feeding habits extend well beyond foliage. Distinguish from Cerambycidae (longhorn beetles) and Curculionidae (weevils) by the short, non-geniculate antennae and lack of a rostrum.