Morphology and ultrastructure of the abdominal integumentary glands of Acanthoscelides obtectus Say (Coleoptera : Bruchidae) |
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| Institution: | 2. Laboratoire d''Entomologie Fondamentale et Appliquée, Université de Rennes I, Campus de Beaulieu, Avenue de Général Leclerc, 35042 Rennes Cédex, France;1. School of Mechanical Engineering, Southeast University, Nanjing, P.R. China;2. School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang, P.R. China;1. Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Ap. Postal 70-248, Ciudad de México, 04510, Mexico;2. Graduate School of Pharmaceutical Sciences, Kyoto University: Sakyo-ku, Kyoto, 606-8501, Japan;1. School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, China;2. Oil & Gas Fire Protection Key Laboratory of Sichuan Province, Chengdu 611731, China;3. Xi’an Changqing Technology Engineering Co. Ltd, Xi’an 710018, China;4. PetroChina Oil & Gas Pipeline Control Center, Beijing 100007, China;1. Biodosimetry Research Team, Research Center for Radiation Emergency Medicine, National Institute of Radiological Sciences, Chiba, Japan;2. REMAT, National Institute of Radiological Sciences, Chiba, Japan |
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| Abstract: | The morphology of the abdominal integumentary glands of the bean weevil Acanthoscelides obtectus (Coleoptera : Bruchidae) is described. There are 2 types: glands with long secretory ducts and ampullate glands with short ducts. The former are distributed throughout the integument and have 2 secretory cells, one of which is connected to the reservoir in the distal receptor zone, and the other to the duct. The duct, which is 100 μm long, has an epicuticular structure and its evacuation pore is 0.5 μm in diameter. It is surrounded by cytoplasm rich in microtubules. The epicuticular structure of the duct is resolved into fine filaments in the distal region. The ampullate glands exist only on the abdominal tergites and the pygidium. They are composed of an epicuticular receptor ampoule and a short duct connected to one secretory cell. The 2 types of glands can be placed in class 3 according to the nomenclature of Noirot and Quennedey (1974. Annu. Rev. Entomol. 19: 61–80). |
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