Smooth Spider Beetle

Scientific Name: Gibbium aequinoctiale

Order & Family: Coleoptera; Ptinidae

Size: 1.5 to 3.5 mm in length

Smooth Spider Beetle

Natural Habitat

Indoor environments like warehouses, granaries, and museums; often found in dark, damp locations

Diet & Feeding

Scavengers that feed on organic matter including dried animal products, seeds, grain, wool, and leather

Behavior Patterns

Primarily nocturnal insects that are slow-moving and often crawl on floors or walls; they resemble small spiders due to their globular abdomen

Risks & Benefits

Considered a minor household and storage pest as they contaminate food products, but they do not bite humans or pets

Identified on: 1/2/2026