Abstract:

The purpose of this study is to clarify the type, quantity, distribution and morphological characteristics of head, proboscis and mouthparts sensilla of the female and male adults of C. dieckamanni. Scanning electron microscope was used for the observation. Three types of sensilla were found in the heads of both male and female adults, namely sensilla squamiformia, dimples sensilla and cuticular pore. There was no dimorphism in the types of head sensilla in males and females. The number of sensilla squamiformia was significantly higher in females than that in males (P<0.05). The number of dimples sensilla was not significantly different between males and females (P>0.05), and there was only one cuticular pore in the head of both males and females. We found only one type of sensilla in the proboscis of male and female adults - the sensilla coeloconica, the number of which was significantly higher in females than that in males (P<0.05). Four types of sensilla were found in the mouthparts of both male and female adults of C. dieckamanni, namely sensilla basiconica, sensilla cylindric, fin sensilla and bearing short basiconic sensilla. There was no dimorphism between males and females in the types of mouthparts sensilla of C. dieckamanni, and their numbers were the same. In this study, we observed and analyzed the type, quantity, distribution and morphological characteristics of the head, proboscis and mouthparts sensilla of adult C. dieckamanni, and these results can provide a basis for further research on the behavioral ecology and physiology of C. dieckamanni.

Key words: Curculio dieckamanni, head sensilla, proboscis sensilla, mouthparts sensilla, scanning electron microscope, morphology, ultrastructure