Arafa Safaa Z, El-Naggar Mohammed M, Kearn Graham C
Zoology Department, Faculty of Sciences, Mansoura University, Mansoura, Egypt,
Acta Parasitol. 2014 Jun;59(2):238-46. doi: 10.2478/s11686-014-0236-0. Epub 2014 May 15.
Some organs of the reproductive system of the protogynous monogenean skin parasite Macrogyrodactylus congolensis (Prudhoe, 1957) Yamaguti, 1963 have been studied using transmission electron microscopy. The vesicula seminalis is enclosed by a prominent layer of circular muscle fibres and has inner syncytial protrusions. The penis bulb is a highly muscular organ with prominent radial and circular muscle fibres, a gutter-shaped large spine and 16 small spines. Two syncytial male accessory glands, and a single reservoir for male accessory secretion were identified. The secretory bodies in the male accessory glands and male accessory reservoir have a unique structure. A large oocyte is situated in a chamber, previously referred to as the "ootype" or "egg-cell-forming region" (ECFR), which also contains one or two small undifferentiated cells and vacuolated tissue. Mature spermatozoa were abundant in the receptaculum seminis and dispersed in the vacuolated tissue in the ECFR and appeared to be attached to the membrane of the large oocyte. Mature spermatozoa were also seen in the parenchymal tissue near the chamber containing embryos and even in the tissues of the embryo.
利用透射电子显微镜对雌性先熟的单殖吸虫类皮肤寄生虫刚果巨旋盘虫（Prudhoe，1957）Yamaguti，1963生殖系统的一些器官进行了研究。精囊被一层明显的环形肌纤维所包围，并有内部的合胞体突起。阴茎球是一个肌肉高度发达的器官，有明显的放射状和环形肌纤维、一个沟状大棘和16个小棘。鉴定出两个合胞体雄性附属腺和一个单一的雄性附属分泌物储存库。雄性附属腺和雄性附属储存库中的分泌小体具有独特的结构。一个大卵母细胞位于一个腔室中，该腔室先前被称为“卵模”或“卵细胞形成区”（ECFR），其中还含有一两个未分化的小细胞和空泡化组织。成熟精子在贮精囊中大量存在，并分散在ECFR的空泡化组织中，似乎附着在大卵母细胞的膜上。在含有胚胎的腔室附近的实质组织中甚至在胚胎组织中也可见到成熟精子。
