Aneurus inconstans

Distinguished from other flat bugs by genitalic and antennal characteristics typical of the genus Aneurus. Separation from congeners requires examination of male genitalia and precise antennal segment proportions. General flat bug morphology—extremely flattened body with long antennae—separates it from most other Hemiptera families.

Small, dorsoventrally flattened true bug with a broad, oval body shape characteristic of the family Aradidae. Body appears strongly flattened, an adaptation for living in tight spaces under bark. Antennae are relatively long and filiform. Coloration and specific markings are not well documented in available sources.

Associated with woody substrates, particularly under bark of dead or decaying trees. Specific microhabitat preferences within this niche are not documented.

Documented from North America, with confirmed records from Vermont, United States. Broader North American range is indicated but not precisely defined.

• Other Aneurus speciesCongeners share the flattened body form and bark-dwelling habits; precise identification requires examination of genitalic structures and antennal proportions.
• Other Aradidae generaAll flat bugs share extreme dorsoventral flattening; Aneurus is distinguished by specific antennal and body proportions, and male genitalic morphology.

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