昆虫学报 ›› 2020, Vol. 63 ›› Issue (1): 11-21.doi: 10.16380/j.kcxb.2020.01.002

• 研究论文 • 上一篇    下一篇

亲土苔蛾成虫复眼超微结构

陈庆   

  1. (河南科技大学林学院, 昆虫进化与系统学实验室, 河南洛阳 471023)
  • 出版日期:2020-01-20 发布日期:2020-01-19

Ultrastructure of adult compound eyes of Manulea affineola (Lepidoptera: Erebidae: Arctiinae)

CHEN Qing-Xiao   

  1.  (Laboratory of Insect Evolution and Systematics, Forestry College, Henan University of Science and Technology, Luoyang, Henan 471023, China)
  • Online:2020-01-20 Published:2020-01-19

摘要: 【目的】重叠型眼在昆虫复眼演化中起着重要作用。本研究旨在阐明夜出型亲土苔蛾Manulea affineola复眼类型及结构特征,以期填补灯蛾亚科昆虫复眼研究的空白,扩充夜出型昆虫复眼的特征数据,为探讨重叠型眼的变异趋势及复眼演化提供依据。【方法】运用光学和透射电子显微技术观察亲土苔蛾成虫复眼的超微结构。【结果】亲土苔蛾成虫复眼具有一个透明区,由6个次级色素细胞的透明胞质构成。小眼具8个视网膜细胞,其中1个视网膜细胞较短,仅位于小眼基部。在透明区内,7个视网膜细胞聚集成一束,其远端与晶体束末端相接,但并不形成视杆。在透明区下方,这7个视网膜细胞形成一个中心融合的视杆。在复眼背缘区的小眼的视杆具有近似矩形的横截面,而其余小眼的视杆具多分支状截面。【结论】亲土苔蛾成虫复眼属于重叠型眼;复眼背缘区的矩形视杆很可能与昆虫的偏振敏感性有关。

关键词: 鳞翅目, 裳蛾科, 灯蛾亚科, 亲土苔蛾, 小眼, 透明区, 重叠型眼

Abstract: 【Aim】 Superposition eyes play significant roles in the evolution of compound eyes of insects. The study aims to elucidate the type and structural features of compound eyes of nocturnal Manulea affineola, attempting to fill a gap in the compound eye research in the Arctiinae, to expand the characteristic data of the compound eyes of nocturnal insects, and to provide evidence for exploring the variation trend of superposition eyes and the evolution of compound eyes. 【Methods】 The ultrastructure of adult compound eyes of M. affineola was observed using light and transmission electron microscopy. 【Results】 The adult compound eyes of M. affineola possess clear zones, which are formed by electron-lucent cytoplasm of six secondary pigment cells. The ommatidium has eight retinula cells, one of which is short and only located at the base of ommatidium. Within the clear zone, seven retinula cells gather into a bundle, which distally connects with the proximal end of the crystalline tract but does not form a rhabdom. Beneath the clear zone the seven retinula cells form a centrally-fused rhabdom. The rhabdoms display approximately square transverse profiles in the ommatidia in the dorsal rim area of the compound eye, whereas in the rest ommatidia they assume multi-branched transverse profiles. 【Conclusion】 The adult compound eyes of M. affineola are of the superposition eyes. The square rhabdoms in the dorsal rim area of the compound eye are likely related to the polarization sensitivity of insects.

Key words: Lepidoptera, Erebidae, Arctiinae; Manulea affineola, ommatidium, clear zone; superposition eye