Otiorhynchus ligneus

Distinguishing O. ligneus from other Otiorhynchus species requires examination of genitalic structures and detailed morphological characters not summarized in general references. The species can be separated from other broad-nosed weevil genera by the combination of: rostrum broad and short relative to body (characteristic of Entiminae), antennae with scape longer than funicle, and tibiae with a distinct mucro (apical spine). Geographic restriction to eastern Canada may aid in narrowing identification possibilities.

As a member of the broad-nosed weevils (Entiminae), this species possesses the characteristic elongated snout (rostrum) with mouthparts at the tip, elbowed antennae, and a compact, often somewhat cylindrical body form typical of the genus Otiorhynchus. Specific coloration and body proportions for O. ligneus are not documented in available sources.

Specific habitat preferences are not documented. Based on distribution records, the species occurs in the Atlantic provinces and Québec, suggesting tolerance of cool, humid climates and forested or coastal environments typical of this region.

Endemic to eastern Canada. Documented from New Brunswick, Newfoundland and Labrador, Nova Scotia, Prince Edward Island, and Québec. No records from the United States or other regions have been confirmed.

• Otiorhynchus ovatus (strawberry root weevil)Overlaps in eastern Canadian distribution and general body form; O. ovatus is a significant agricultural pest with documented economic impact, whereas O. ligneus has no recorded pest status
• Other Otiorhynchus speciesNumerous congeners occur in North America; species-level identification requires specialist examination of genitalia and other fine structural characters

• weevil
• broad-nosed weevil
• Curculionidae
• Canadian endemic
• eastern Canada

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy