Intrapuparial Age Estimation of Forensically Important Dohrniphora cornuta (Diptera: Phoridae)

Area of Science:

• Forensic Entomology
• Developmental Biology
• Entomology

Background:

• Dohrniphora cornuta is a key insect in forensic investigations.
• Accurate age estimation of immature insects is vital for determining minimum postmortem intervals (PMImin).
• The intrapuparial stage of D. cornuta lacks comprehensive developmental data.

Purpose of the Study:

• To investigate morphological changes during the intrapuparial development of D. cornuta.
• To establish a staging system for estimating intrapuparial age.
• To provide data for improving PMImin estimations in forensic cases.

Main Methods:

• Constant temperature experiments (15-36°C) were conducted.
• Puparia were sampled at regular intervals.
• Morphological changes within puparia were analyzed using stereomicroscopy.

Main Results:

• The intrapuparial duration was inversely related to temperature, with development ceasing at 36°C.
• Nine distinct morphological stages were identified within the puparium for both sexes.
• Developmental duration ranged from approximately 185 hours at 30°C to over 1100 hours at 15°C.

Conclusions:

• The identified morphological stages provide reliable markers for estimating the intrapuparial age of D. cornuta.
• This research enhances the accuracy of PMImin estimations in forensic entomology.
• The data contributes to a more systematic understanding of D. cornuta development.