Phloeonomus suffusus

Members of Phloeonomus can be distinguished from other small omaliine rove beetles by their compact body form, short elytra that expose most of the abdomen, and antennae with a slightly clubbed appearance. Specific identification of P. suffusus requires examination of male genitalia and comparison with related species such as P. puncticollis and P. laetus. The species name 'suffusus' (meaning 'suffused' or 'diffused') likely refers to coloration patterns on the elytra or pronotum.

Based on collection records and genus-level associations, this species inhabits moist forest environments, particularly in coastal regions. Phloeonomus species are typically found in decaying plant material, under bark, in leaf litter, and in association with fungi. The western North American distribution suggests association with temperate rainforest and coastal coniferous forest ecosystems.

Documented from Canada (British Columbia) and the United States (Alaska, California, Oregon, Washington). Records indicate a Pacific coastal distribution pattern.

As a member of the Omaliinae, this species likely contributes to nutrient cycling in forest ecosystems through consumption of decaying organic matter and fungal material. Rove beetles in this subfamily are generally considered beneficial decomposers in forest floor communities.

No direct economic or medical significance has been documented. The species is of interest primarily to entomologists studying Staphylinidae diversity and Pacific Northwest beetle fauna.

• Phloeonomus puncticollisOverlapping distribution in western North America; distinguished by differences in punctation of the pronotum and elytra, as well as male genitalia structure.
• Phloeonomus laetusSimilar size and habitat preferences; requires careful examination of antennae structure and genitalia for definitive separation.
• Other small Omaliinae genera (e.g., Eudectus, Acrotona)Similar compact body form and habitat; Phloeonomus is distinguished by characteristic antennal structure and details of the mesosternal process.

• Staphylinidae
• Omaliinae
• rove beetle
• Pacific Northwest
• forest floor
• decomposer

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