Ultrastructure of spermiogenesis and the spermatozoon of Monorchis parvus Looss, 1902 (Digenea, Monorchiidae), a parasite of Diplodus annularis (Pisces, Teleostei)
Ultrastructure of spermiogenesis and the spermatozoon of Monorchis parvus Looss, 1902 (Digenea, Monorchiidae), a parasite of Diplodus annularis (Pisces, Teleostei)
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DOI：
10.1007/s00436-004-1115-7
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发表时间：
2004-06-01
影响因子：
2
通讯作者：
Marchand, B
中科院分区：
文献类型：
--
作者：
Levron, C;Ternengo, S;Marchand, B
本文描述了小单睾吸虫（Trematoda，Digenea，Monorchildae）精子发生和精子的超微结构特征。这种精子发生的特征是鞭毛旋转约120度，并形成一种新的超微结构元件：中心粒延伸。然而，它遵循一般模式的digeneans。它开始于分化区的形成，包括与两个中心粒和一个中心粒间体相关的条纹状小根。成熟精子的特征可区分M.小吸虫和其他双殖吸虫。它有一个原始的前端。轴丝的两个中心元件出现在外围双峰之前。细胞膜的外表面平行于中心元件形成。雄配子的另一个特点是存在两个线粒体。M.因此，小吸虫与其他复殖吸虫明显不同。
The present paper describes the characteristic ultrastructural features of spermiogenesis and the spermatozoon of Monorchis parvus (Trematoda, Digenea, Monorchildae). This spermiogenesis is characterized by a flagellar rotation of about 120degrees and the formation of a novel ultrastructural element: a centriolar extension. It nevertheless follows the general pattern of digeneans. It begins with the formation of a differentiation zone, comprising striated rootlets associated with two centrioles and an intercentriolar body. The mature spermatozoon presents features allowing the distinction between M. parvus and other digenetic trematodes. It possesses an original anterior extremity. The two central elements of the axonemes appear prior to the peripheral doublets. The external ornamentations of the cell membrane are formed parallel to the central elements. Another peculiarity of the male gamete is the presence of two mitochondria. M. parvus, therefore, differs distinctly from other digenetic trematodes.