Dermestidae
Definition
The skin beetles. Oval, hairy or scaly-bodied beetles whose larvae feed on dry keratin-rich material: skin, hair, feathers, and dried muscle. They are late-stage decomposition specialists and important in estimating PMI for dry or skeletal remains.
- Common name
- Skin beetles
- Diet
- Dry keratin-rich tissue: skin, hair, feathers
- Decomposition role
- Late-stage/dry specialists
- Forensic use
- PMI estimation for dry or skeletal remains
Common questions
Why are dermestid beetles more useful than blow flies for later-stage PMI estimation?+
Blow flies and their larvae colonise fresh, moist tissue in the early stages of decomposition and are largely gone by the dry stage. Dermestid beetles arrive specifically when remains have desiccated, so their presence and developmental stage extend the usable PMI window well past what insect evidence from the fresh and bloat stages can cover.
Can Dermestidae presence alone give a precise PMI figure?+
No, it gives a broad indication that remains have reached the dry stage, typically weeks to months or more depending on climate; a precise estimate requires combining this with local temperature data, other insect succession evidence, and case-specific conditions.
Related terms
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- Silphidae
- Carrion beetles. Arrive during active to advanced decay. Nicrophorus (burying beetles) provision small carcasses for their larvae; Silpha species scavenge larger remains....
- Skeletonisation Stage
- The decomposition stage at which all soft tissue has been consumed and only mineralised bone, cartilage, and possibly dry skin or hair...
- Staphylinidae
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