Internal Cavity Insects
Definition
Larvae or puparia found inside the skull, thorax, or abdomen during internal autopsy examination. They often represent colonisation through wounds or extended decomposition and must be collected separately from surface insects.
- Field
- Forensic entomology, autopsy collection
- Location found
- Skull, thorax, or abdomen cavities
- Significance
- Often indicates colonisation through wounds or advanced decomposition
- Collection rule
- Kept separate from surface-collected insects
Common questions
Why must internal cavity insects be collected separately from surface insects?+
Mixing the two obscures the colonisation timeline, since internal specimens may represent a later wave of activity that entered through wounds or body openings after surface colonisation began, and analysing them together would blur the succession pattern used to estimate a post-mortem interval.
What does the presence of internal cavity insects suggest about a body's condition?+
Their presence generally indicates the body has reached a decomposition stage, or has wound access, advanced enough for insects to penetrate beyond the surface, which entomologists factor into interval estimates alongside surface species and stage data.
Related terms
- Body Bag
- The sealed bag used to transport the body from scene to mortuary. Treated as a collection zone because migrating larvae, puparia, and...
- External Examination
- The stage of the autopsy in which the pathologist examines the body surface, documents injuries, and removes clothing before any incisions are...
- Instar
- A developmental stage between moults (ecdysis). Blow flies have three larval instars (L1, L2, L3), each ending when the larva sheds its...
- Maggot Mass Documentation
- The photographic and physical record of each maggot mass location, volume, instar, and temperature taken at the start of autopsy before any...
- Puparium
- The hardened, barrel-shaped case formed from the last larval skin when a blow fly larva pupates. Puparia are dark brown and can...