Anatomy and fine structure of pedicellar glands in phoretic deutonymphs of uropodid mites (Acari: Mesostigmata)

被引:15
作者
Bajerlein, Dania [1 ]
Witalinski, Wojciech [2 ]
机构
[1] Adam Mickiewicz Univ, Fac Biol, Dept Anim Taxon & Ecol, PL-61614 Poznan, Poland
[2] Jagiellonian Univ, Inst Zool, Dept Comparat Anat, PL-30387 Krakow, Poland
关键词
Pedicel; Phoresy; Uropoda orbicularis; Uroobovella marginata; Uroobovella nova; Trichouropoda ovalis; BEETLES COLEOPTERA; ORBICULARIS ACARI; HYDROPHILIDAE; SCARABAEIDAE; ASSOCIATIONS;
D O I
10.1016/j.asd.2012.02.006
中图分类号
Q96 [昆虫学];
学科分类号
摘要
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 (Muller), 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. (C) 2012 Elsevier Ltd. All rights reserved.
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页码:245 / 257
页数:13
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