Deltometopus

Members of Deltometopus can be distinguished from other Eucnemidae by characters of the mature larva, including specific morphological features of the head capsule and mouthparts. Adults likely exhibit the elongate body form and reduced prosternal process typical of Macraulacinae. Separation from related genera such as Macraulacis requires examination of antennal structure and elytral sculpture.

Based on larval biology of Deltometopus amoenicornis, the genus is associated with decaying wood in forested environments. Larvae develop within decomposing woody substrates.

Nearctic Region. Records include North American localities where D. amoenicornis and congeners occur.

The mature larva of Deltometopus amoenicornis has been described, indicating a complete metamorphosis with wood-boring larval stages. Specific details on egg, pupal, and adult longevity are not documented.

Larvae are wood-borers, developing within decaying wood. Adults are likely nocturnal and attracted to light, consistent with Eucnemidae.

Larvae contribute to wood decomposition and nutrient cycling in forest ecosystems through their activity in decaying wood.

• MacraulacisBoth genera belong to Macraulacini and share elongate body form; distinguished by antennal structure and elytral features
• EucnemisRelated genus in Eucnemidae with different prosternal morphology and larval habitat preferences

• Eucnemidae
• Macraulacinae
• false click beetles
• wood-boring larvae
• Nearctic
• decaying wood

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Eucnemid Larvae of the Nearctic Region. Part II: Description of the Mature Larva ofDeltometopus amoenicornis(Say, 1836) (Coleoptera: Eucnemidae: Macraulacinae: Macraulacini), with Notes on Its Biology