Trichoptera
Definition
Caddisflies, whose larvae build protective cases from plant material, sand, or other debris. They colonise decomposing organic matter and can help establish the minimum submersion period when fresh adult emergence or case-building activity is present.
- Common name
- Caddisflies
- Larval behaviour
- Build protective cases from plant material, sand, or debris
- Habitat
- Decomposing organic matter in aquatic settings
- Forensic use
- Helps establish minimum submersion period
Common questions
What specific evidence from Trichoptera helps date a submersion?+
Fresh case-building activity or recent adult emergence on submerged remains indicates caddisflies have only recently colonised the site, which sets a lower bound on how long the remains have been underwater.
Why are caddisflies useful in aquatic forensic entomology when most forensic insect evidence comes from terrestrial species?+
Standard terrestrial succession models such as blowfly colonisation do not apply underwater, so aquatic-adapted insects like caddisflies fill the same evidentiary role for submerged remains that flies and beetles fill on land.
Related terms
- Accumulated Degree Hours (ADH)
- A temperature-corrected measure of developmental time. Calculated by summing (hourly ambient temperature minus the species-specific base temperature threshold) across the period of...
- Aquatic Succession
- The predictable sequence in which aquatic invertebrate species colonise submerged remains, analogous to the terrestrial blowfly succession but driven by different taxa...
- Chironomidae
- Non-biting midges whose blood-red larvae (bloodworms) are among the earliest colonisers of submerged organic matter. Their development rates are temperature-dependent and well...
- Ephemeroptera
- Mayflies. Aquatic nymphs of some genera, including Baetis and Ephemerella, have been recovered from submerged remains in Europe and North America. Their...
- Submersion Interval
- The period for which a body was beneath the water surface. Distinct from the post-mortem interval, because the body may have died...