Trichapion tenuirostrum

Members of Trichapion can be distinguished from other apionine genera by the presence of dense, erect setae on the elytra and a distinctly slender, elongate rostrum in both sexes. T. tenuirostrum specifically is characterized by its relatively narrow rostrum (hence the specific epithet), though precise diagnostic features separating it from congeners require examination of genitalia. The body is generally small (approximately 2-3 mm), cylindrical, and dark brown to black in color with subtle metallic reflections.

Prairie and parkland regions of central Canada, associated with open grassland and shrubland habitats where leguminous host plants occur.

Recorded from Alberta, Saskatchewan, and Manitoba in Canada. The distribution appears restricted to the northern Great Plains region.

• Fabaceae - probableGenus-level association inferred from known biology of Trichapion; specific host plant for this species unconfirmed

As a seed-feeding weevil, members of this genus likely function as primary consumers of legume seeds, potentially influencing plant population dynamics and serving as prey for small predators and parasitoids.

• Apion spp.Other apionine weevils share general body form and seed-feeding habits; Trichapion distinguished by denser elytral setation and more slender rostrum
• Trichapion porcatumCongener with overlapping distribution; distinguished by rostral and genitalic characters requiring microscopic examination

• weevil
• Brentidae
• seed-feeder
• prairie
• Canadian endemic

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon