Pelophila borealis

The combination of small size (under 11 mm), shiny black coloration without markings, and occurrence in boreal and arctic habitats distinguishes this species from most other ground beetles in its range. It is the only species in the genus Pelophila, making generic identification straightforward. Within the subfamily Nebriinae, the small size and polished black appearance separate it from larger, often more patterned relatives.

Small ground beetle with a shiny black exoskeleton. Body length ranges from 9.5 to 10.1 mm. The glossy, unmarked black coloration is distinctive within its range.

Boreal and arctic environments, including tundra, taiga, and northern forest-edge habitats. Associated with moist, muddy, or riparian conditions as suggested by its common name and genus name (Pelophila = mud-loving).

Holarctic distribution: Belarus, Canada, Estonia, Finland, Latvia, Norway, Russia, and Sweden. Records indicate presence in Alaska.

• Nebria spp.Other Nebriinae ground beetles share the subfamily but are generally larger, often with patterned or metallic coloration, and lack the small, uniformly shiny black appearance of Pelophila borealis.
• Other small CarabidaeSmall black ground beetles in other subfamilies (e.g., Bembidiini) often have elytral striae or microsculpturing that reduces shininess, and lack the specific combination of size, gloss, and boreal habitat preference.

• ground beetle
• boreal
• arctic
• Holarctic
• Nebriinae
• Carabidae

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