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,
Oxford Scientific Films name from Parks' existing company Oxford Biological Films. Thompson, Parks, Morris, Paling, and Thompson's son David, headed the new company, which began operating on 8 July 1968. Thompson remained at his position at Oxford University while the company building was being completed, while the other four travelled to America to make the film loops for Ealing. Thompson resigned from the university on 2 September 1969, taking on the work at Oxford Scientific Films full-time. The company focused initially on filming nature at a microscopic level, including insect and aquatic wildlife. Using specialised equipment and camera techniques the developed themselves, the