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This study presents a checklist of Dipterans and Coleopterans accountable for carrion decay in the Po Valley (Italy), a contribution to the Forensic Entomology knowledge in Italy. Insects colonizing two pig carcasses in an agricultural area in Mezzani municipality (Parma, Northern Italy) were sampled by pitfall traps and original Malaise-like traps, which allowed the sampling of a very relevant number of flying insects. A checklist of 57 taxa was obtained, of which 26 were considered of forensic importance. For the latter the arrival time of adult specimens on the carcasses was recorded, as an important parameter in minimum post mortem interval estimation. Dipterans (6141 specimens) were the most common insects; the fastest specimens to detect and colonize the carcass belonged to the Calliphoridae family, while Fanniidae and Muscidae infested the carrion until completion of the skeletal stage. Coleopterans appeared later (308 adult specimens and 114 larvae were captured). Staphylinidae, Dermestidae, and Histeridae were the most common coleopterans sampled in this study.
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