| 摘要: |
| 角蝉科昆虫发达的前胸背板遮盖住身体背面的大部分面积，形成各种奇异的形状，但前胸的体腔却非常短，仅限于前胸胝以下的部分。前胸胝的内面是前胸背板的内脊，着生有前足的背源运动肌。前胸背板的表面一般具有刚毛和刻点，在扫描电镜下观察到这些结构在种间有明显的形态差异。组织学研究表明，前胸背板是一个双层的几丁质结构，实质上是前胸背板连同体腔一起延伸的结果。外层体壁上有丰富的毛状感受器，内层体壁内面有极小的锥状小齿；两层体壁上各有一层真皮细胞，但内层的皮细胞较稀疏；两层体壁的中间有气管和神经分布。研究还发现前胸背板有极好的力学结构和强度，作者认为机械保护作用和感觉功能是角蝉前胸背板的两个基本功能。 |
| 关键词: 角蝉，前胸背板，形态，组织学 |
| DOI： |
| 分类号:Q969.351.4 |
| 基金项目:国家自然科学基金资助项目 |
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| Morphological and Histological Studies on the Membracid Pronotum(Homoptera) |
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| Abstract: |
| Membracidae are characterized by their extremly enlarged pronotumwhich exhibits a bizzar form and takes a large portion of the dorsal surface of the body,but the prothoracic coelom lying just below the superoccullar callosities is quite short.Each callosity internally forms an apodemal ridge on which the tergal promotor and remotor of the foreleg arise. Haris and punctata more or less occur on the outer surface ofthe pronotum. These structures vary in different species and can be easily determinedwith SEM. Histological studies demonstrate that the pronotum is a double folded structure made up of two chitinized walls and a thin coelom in the middle. Both walls have alayer of epidermis which is denser on outer wall than that on inner wall.Between thewalls there exist tracheae and nerves.Studies also indicate that the pronotum is a welldeveloped structure with a strong hardness. So the mechanic protection and sensory rolesmay be the two primary functions of the pronotum. |
| Key words: Membracidae,pronotum,morphology,histology |
