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The cheese fly, cheese skipper, or ham skipper (Piophila casei) is a species of fly from the family Piophilidae whose larvae are known to infest cured meats, smoked or salted fish, cheeses and carrion. On the Mediterranean island of Sardinia, the larvae are intentionally introduced into pecorino cheese to produce the characteristic casu martzu.
The most notorious member of the family is the cheese fly, Piophila casei; it is cosmopolitan, and a typical member of the family. It is a small species, about 4 mm (0.16 in) long. The fly's larvae infest cured meats, smoked or salted fish, cheeses, and carrion.
It is a small fly, about four mm (1/6 inch) long, found worldwide. This fly's larva infests cured meats, smoked fish, cheeses, and decaying animals and is sometimes called the cheese skipper for its leaping ability. Forensic entomology uses the presence of Piophila casei larvae to help estimate the date of death for human remains.
Piophila is a genus of small flies which includes the species known as the cheese fly. Both Piophila species feed on carrion , including human corpses . [ 1 ] [ 2 ]
Entomological evidence collection is the process of collecting evidence based on insect clues used in criminal investigations.If evidence is not carefully preserved at a crime scene after a death, it may be difficult or impossible for an entomologist to make an accurate identification of specimens, if for example, all morphological characteristics are not preserved.
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Casu martzu is created by leaving whole pecorino cheeses outside with part of the rind removed to allow the eggs of the cheese fly Piophila casei to be laid in the cheese. A female P. casei can lay more than 500 eggs at one time. [2] [8] The eggs hatch and the larvae begin to eat through the cheese. [9]
Piophila casei (Linnaeus, 1758) Ulidiidae (picture-winged flies) 6 species including Ceroxys urticae (Linnaeus 1758) Herina frondescentiae (Linnaeus, 1758) Herina lugubris (Meigen 1826) Seioptera vibrans (Linnaeus, 1758) Tetanops myopina Fallen, 1820; Platystomatidae (signal flies) 2 species including Platystoma seminationis (Fabricius, 1775)