Bothriderini

Distinguished from other bothriderid tribes by combinations of antennal structure, body proportions, and male genitalia characteristics. The tribe can be separated from the related tribe Teredini by differences in antennal club development and pronotal shape. Accurate identification to genus or species requires examination of microscopic characters including tarsal formula, antennal segmentation, and aedeagus morphology. Specimens are best collected by rearing from infested wood or by sifting decaying woody debris.

Primarily associated with dead and decaying wood, particularly hardwoods. Found in forested environments where wood-boring beetle hosts are present. Microhabitats include under bark of dead trees, within decaying logs, and in wood-boring beetle galleries. Moisture levels in substrate appear important for host beetle development and consequently for Bothriderini presence.

Documented from multiple biogeographic regions including North America, Europe, Asia, and Australia. Distribution is constrained by presence of suitable host beetles and appropriate woody substrates. Records are scattered and incomplete for many regions due to the cryptic habits of these beetles.

Adult activity patterns poorly documented. Likely active primarily during warmer months when host beetles are developing. Adults may be found year-round in suitable microhabitats but are rarely encountered due to concealed lifestyle. Peak emergence probably coincides with host beetle pupation and adult emergence.

• wood-boring beetles - ectoparasitoidHosts primarily within families Cerambycidae, Buprestidae, and Curculionidae (Scolytinae). Larvae are ectoparasitoids on host larvae within wood galleries.

Adults are cryptic and rarely observed free-living. Larvae are active ectoparasitoids, locating and attaching to host beetle larvae within wood tunnels. Larvae feed externally on host body fluids, eventually killing the host. Pupation occurs within the host gallery or in surrounding wood tissue. Adults likely do not feed or feed little.

Biological control agents of wood-boring beetles. Population dynamics are closely tied to host beetle abundance. May influence community structure of saproxylic beetles through parasitoid pressure on dominant wood-borer species. Contribution to nutrient cycling indirect through effects on wood decomposition rates mediated by host population suppression.

Potential biological control agents for pest wood-boring beetles in forestry and urban settings. Some host species are significant timber pests, making Bothriderini of interest for applied biological control research. Not directly harmful to humans, structures, or stored products. Rarely encountered by non-specialists.

• TerediniAlso a tribe within Bothrideridae; distinguished by more developed antennal club and different pronotal proportions
• PassandridaeFormerly included in Bothrideridae; flattened parasitoid beetles with similar habits but differ in tarsal structure and antennal insertion
• Colydiinae (Zopheridae)Similar flattened, wood-associated beetles; distinguished by different antennal structure, tarsal formula, and non-parasitoid life history

• ectoparasitoid
• saproxylic
• wood-associated
• biological control
• cryptic

• BugGuide
• iNaturalist taxon