Lucanidae

Definition

A family of beetles (order Coleoptera) comprising approximately 1,200 species in four extant subfamilies, commonly known as stag beetles. Members are characterized by pronounced sexual dimorphism, with males typically bearing enlarged, antler-like mandibles used in combat and courtship. Adults are generally saproxylic, associated with decaying wood; larvae develop in rotting wood and leaf litter. The family is classified within the superfamily Scarabaeoidea (infraorder Scarabaeiformia, suborder Polyphaga).

Etymology

From the genus Lucanus (Latin, possibly referring to a region in Italy) + -idae (family suffix)

Example

Male Lucanus cervus, the European stag beetle, use their oversized mandibles to grapple rival males for access to females, while the smaller females use their more modest mandibles to chew into decaying oak stumps to lay eggs.

Synonyms

• stag beetles (common name)

Related Terms

• Coleoptera
• Scarabaeoidea
• Polyphaga
• saproxylic
• Mandible
• Sexual dimorphism
• Lucanus
• Aesalinae
• Lampriminae
• Lucaninae
• Syndesinae

Usage Notes

While 'stag beetle' is the widespread common name for the family, it is sometimes applied more narrowly to larger species in the nominate subfamily Lucaninae. The family's placement within Scarabaeoidea is well established, though some older classifications treated Lucanidae as a separate superfamily. The extinct subfamilies †Litholampriminae, †Ceruchitinae, and †Protolucaninae are recognized from the fossil record.