Anatomy and fine structure of pedicellar glands in phoretic deutonymphs of uropodid mites (Acari: Mesostigmata) |
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| Authors: | Daria Bajerlein Wojciech Witaliński |
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| Institution: | 1. Department of Animal Taxonomy and Ecology, Faculty of Biology, A. Mickiewicz University, Umultowska 89, 61-614 Poznań, Poland;2. Department of Comparative Anatomy, Institute of Zoology, Jagiellonian University, Gronostajowa 9, 30-387 Kraków, Poland;1. Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Shimoadachi-cho, Sakyo-Ku, Kyoto 606-8501, Japan;2. Department of Pharmacology, Faculty of Pharmaceutical Sciences, Doshisha Women’s College, Kyoto 610-0395, Japan;3. Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa-Ku, Nagoya 464-8601, Japan;1. Physical Chemistry Department, University of Tabriz, Tabriz, Iran;2. Department of Organic and Bioorganic Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 51664, Iran;1. Aix Marseille Université, URMITE, UM63, CNRS 7278, IRD 198, Inserm 1095, 13005 Marseille, France;2. Chemisches und Veterinäruntersuchungsamt Karlsruhe, Weißenburger Straße 3, Abteilung 7, Karlsruhe 76187, Germany;1. Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China;2. Faculty of Veterinary Science, Sindh Agriculture University, Tandojam, Pakistan;1. College of Fisheries, Jimei University, 43 Yindou Road, Xiamen, Fujian Province, 361021, China;2. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China |
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| Abstract: | Phoretic deutonymphs of uropodid mites are attached to their carrier via an anal pedicel which is formed by a secretion from the pedicellar gland. Since the ultrastructure of the pedicel and pedicellar gland has never been investigated, we studied these structures in three species, Uropoda orbicularis (Müller), Uroobovella marginata (Koch), and Trichouropoda ovalis (Koch) by light (LM) and electron microscopy (TEM, SEM). In addition, the pedicel in Uroobovella nova (Oudemans) was documented in SEM.The pedicellar gland is a distinct globular structure comprised of three types of secretory cells (A-, B-, and C-types) with apical parts directed towards a junctional zone of postcolon and anal atrium. Secretory cells of the A-type are located dorsally, whereas B-type cells are central, and C-type cells are distributed ventrally or both ventrally and dorsally. Protrusions of visceral muscle cells are distributed on the external surface of the gland. The cuticle-lined anal atrium is large and located between the gland and dorso-anal muscles. The pedicel is composed of a main stalk and two extended extremities: one adhering to the anal region of the deutonymph and a second connected to the cuticle of the carrier. In each case, the anal atria were empty, whereas the pedicellar material was located outside of the mite body. |
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