茸卷象属感受器的扫描电镜观察

Scanning electron microscopic observations on the Sensilla of Genus Euscelophilus

本文以茸卷象为研究对象,利用扫描电子显微镜对其视觉感受器、化学感受器和物理感受器的亚显微结构进行观察,结果表明:其视觉感受器即复眼由六角形小眼紧密排列构成;物理感受器位于腹节暗区,分为乳突状感受器和栓锥状感受器两种,其中乳突状感受器顶端呈刺状并存在种间差异;化学感受器集中于触角和口器上,主要有板状感受器、刺状感受器、锥状感受器、钟状感受器和毛状感受器。

Euscelophilus is a genus of Attelabidae distributed in Asia unique. Leaf-rolling weevils of Euscelophilus are parasitic on Rosaceae obligately. To study how the leaf-rolling weevils identify their hosts, the photoreceptor, mechanoreceptor and chemoreceptor of Euscelophilus were observed by scanning electron microscopy in this research. The results show that a compound eye is composed of hexagonal ommatidia; mechanoreceptor located in the dark areas of abdominal segment, which can be distinguished as sensilla basiconic mastoid and sensilla styloconica. The top of sensilla squamiformia is spiny and there are differences among species; chemoreceptors are distributed in the antennae and mouthparts densely, including sensilla basiconica, sensilla placoclea, sensilla campaniformia, sensilla chaetica and sensilla trichodea.