Bisnius siegwaldii

As a member of Bisnius, this species can be distinguished from the related genus Philonthus by the presence of a distinct row of setae on the lateral margins of the pronotum. The genus Bisnius also exhibits differences in the structure of the aedeagus and the arrangement of sensory structures on the antennae. Specific diagnostic features for B. siegwaldii require examination of male genitalia and comparison with closely related species in the genus.

Canada (Alberta, British Columbia, Labrador, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Northwest Territories, Ontario, Prince Edward Island, Quebec, Saskatchewan, Yukon), United States (Alaska, California, Connecticut, Maine, Michigan, Montana, North Carolina, New Hampshire, New York, Oregon, Tennessee, Virginia, Vermont, Washington, Wisconsin, West Virginia), Russia.

As a member of Staphylinidae, this species likely functions as a generalist predator or scavenger in soil and litter communities, though specific ecological roles for B. siegwaldii have not been documented.

• Philonthus spp.Formerly classified in this genus; separated based on pronotal setal patterns and genitalic structure.
• Bisnius sordidusClosely related congener with overlapping North American distribution; requires genitalic examination for definitive separation.

• rove beetle
• Staphylinini
• boreal
• Nearctic
• Palearctic

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life