Petiole (insect anatomy) a pedicel, but in entomology, that term is more correctly reserved for the second segment of the antenna; while in arachnology, 'pedicel' is the accepted term to define the constriction between the cephalothorax and abdomen of spiders. The plump portion of the abdomen posterior to the petiole (and postpetiole in the Myrmicinae) is called the gaster. The structure of the petiole is an easy way to visually classify ants, because the major subfamilies of Formicidae have structural differences: some ants have two-segmented petioles, while others have a single-segmented petiole. Petiole may also be used in the context of wing veins,
Insect development during storage development. However, quiescence acts like an anesthetic, and stops insect development for a short time by slowing down insect metabolic activity. It is induced by a sudden drop in temperature that ranges from 0 °C to 10 °C. A simulation of insects chilling in a morgue was conducted by using "Calliphora vicina" to illustrate that adult emergence is delayed by 24 hours, no matter in which stage the refrigeration occurred. There was no mortality when they were kept at 3 °C for 24 hours. In this simulation, quiescence was induced by the low temperature and the insect physiology was not