Bark-gnawing beetles

Definition

A family of beetles (Trogossitidae, superfamily Cleroidea) characterized by elongated, somewhat flattened bodies and association with woody substrates. Adults and larvae are typically predatory on other insects or feed on fungi, inhabiting spaces beneath bark or within tunnel galleries in dead or dying wood. The family in its current restricted circumscription comprises approximately 400 species in 25 genera, though historically broader definitions included additional groups now assigned to separate families.

Etymology

From the habit of adults and larvae living under bark and their chewing mouthparts adapted for excavating galleries or consuming prey in woody habitats.

Example

Temnoscheila caerulea, a common bark-gnawing beetle in North American forests, preys on bark beetle larvae and pupae within conifer galleries, contributing to natural regulation of scolytine populations.

Synonyms

• Trogossitidae

Related Terms

• Cleroidea
• bark beetles
• saproxylic beetles
• predatory beetles
• wood-boring insects
• gallery (insect)
• Lophocateridae
• Peltidae

Usage Notes

The term now refers specifically to the restricted family Trogossitidae sensu stricto; many genera formerly included under broader definitions have been transferred to related families (Lophocateridae, Peltidae, Protopeltidae, Rentoniidae, Thymalidae). Specialists distinguish bark-gnawing beetles from bark beetles (family Curculionidae: Scolytinae), which are primarily phytophagous and typically smaller. The common name emphasizes habitat rather than diet—members are predators or mycophages, not primary consumers of bark tissue.