草地螟雄蛾生殖系统的形态和结构

针对目前关于草地螟Loxostege sticticalis L.雄成虫生殖系统结构和功能的研究相对缺乏的状况,本文利用光镜和扫描电镜系统研究了草地螟雄蛾的内外生殖器官及相关结构。草地螟雄蛾内外生殖器官集中于腹部第5¹0腹节;内生殖器官位于510腹节;内生殖器官位于5⁸腹节内腔中,由睾丸(testes)、贮精囊(seminal vesicle)、输精管(vas deferens)、附腺(accessory gland)和射精管(ejaculatory ducts)组成;外生殖器官为腹部第9、10腹节的特化结构,包括抱握器(harpes)、背兜(tegumen)、基腹弧(vinculum)、钩形突(uncus)、颚形突(gnathos)、阳茎囊(aedeagal caecum)和阳茎(phallus)。外生殖器中抱握器的端刺(furcella)方向为雄蛾区别于其它种类的一个重要形态学特征。该研究首次明确了草地螟雄蛾的生殖系统结构,并为锥额野螟蛾属中种间分类提供更多的科学依据。

The structure and morphology of the reproductive system of adult male Loxostege sticticalis L.

Using both light microscopy and scanning electron microscopy we observed the internal reproductive organs, external reproductive organs and other relevant structures of the adult male beet webworm Loxostege sticticalis L. Both the internal and external reproductive organs lie within the abdomen from the 5th to 10th segments. The internal organs were located in the abdominal lumen from the 5th to 8th segments and consisted of one pair of testes and vas deferens, two pairs of seminal vesicles, the ejaculatory duct, and accessory gland. The external organs were formed by the highly modified 9th and 10th segment, and included harpes, tegument, vinculum, uncus, gnathos, aedeagal caecum and phallus. A distinctive character is that the direction of the furcella is different from that of other species. This is the first study to clarify the male reproductive system of this species and it provides more scientific evidence for differentiation between species in the genus Loxostege.