Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling, 712100, Shaanxi, China.
College of Forestry, Henan University of Science and Technology, Luoyang, 471023, Henan, China.
Protoplasma. 2019 Jul;256(4):883-891. doi: 10.1007/s00709-019-01346-6. Epub 2019 Jan 17.
The fine structures of vasa deferentia and postvesicular vasa deferentia were investigated in the hangingfly Terrobittacus implicatus (Cai et al. 2006) and the scorpionfly Cerapanorpa nanwutaina (Chou 1981) using light and transmission electron microscopy, and schematic diagrams were drawn accordingly. The vasa deferentia of both species comprise muscular layers, a basal lamina, and a mono-layered epithelium, but the postvesicular vasa deferentia contain muscular layers, a basal lamina, a single-layered epithelium, a subcuticular cavity, and an inner cuticle respectively. The vas deferens releases secretions into the lumen directly, probably by means of merocrine production. On the contrary, the cells of the postvesicular vas deferens correspond to class I glandular cells, discharging secretions into the subcuticular cavity first, and then into the lumen through an inner cuticle. The epithelium in both structures of Bittacidae is well developed and contains more microvilli, organelles, and more types of secretions than in Panorpidae. In Panorpidae, the spine of the postvesicular vas deferens may serve as a barricade for the reflow of the sperm and to protect the extraordinarily long structure from being collapsed or injured.
使用光镜和透射电镜研究了悬停蝇 Terrobittacus implicatus（Cai 等人，2006 年）和蝎蛉 Cerapanorpa nanwutaina（Chou，1981 年）的输精管和囊后输精管的精细结构，并绘制了示意图。这两种物种的输精管都由肌肉层、基膜和单层上皮组成，但囊后输精管包含肌肉层、基膜、单层上皮、皮下腔和内角质层。输精管将分泌物直接排入管腔，可能是通过顶浆分泌的方式。相反，囊后输精管的细胞对应于 I 类腺细胞，首先将分泌物排入皮下腔，然后通过内角质层排入管腔。Bittacidae 两种结构的上皮都很发达，含有更多的微绒毛、细胞器和更多类型的分泌物，比 Panorpidae 多。在 Panorpidae 中，囊后输精管的刺可能起到阻止精子回流的作用，并保护特别长的结构不被塌陷或损伤。
