Skin Beetle Larva hair / Hastisetae
Scientific Name: Anthrenus spp. or Attagenus spp. (setae)
Order & Family: Order: Coleoptera, Family: Dermestidae
Size: Individual hairs (hastisetae) are microscopic to tiny (1-2mm); the full larvae range from 2-5mm in length.
Natural Habitat
Typically found indoors in dark, undisturbed areas like closets, drawers, under furniture, or in carpet. They thrive near sources of natural fibers like wool, silk, or fur.
Diet & Feeding
The larvae feed on keratin-based animal products including wool, fur, feathers, silk, dead insects, pet hair, and dander.
Behavior Patterns
Carpet beetle larvae have a unique defense mechanism where they detach specific spear-headed hairs (hastisetae) from their bodies when threatened. What appears in the image is likely a detached cluster or single hair from such a larva, rather than the whole insect itself.
Risks & Benefits
While not venomous or a disease carrier, the hairs can cause 'carpet beetle dermatitis,' an allergic skin reaction characterized by itchy, red welts. They are significant pests that damage clothing, carpets, and upholstery.
Identified on: 2/22/2026