Nonglait Kasomhung Chanreila Lyngdoh, Das Khirod Sankar, Marwein Cynthia Bansara, Kharthangmaw Joycy Mary, Choudhury Sudipta
Entomology Laboratory, Department of Zoology, North-Eastern Hill University, Shillong, India.
Microsc Res Tech. 2023 May;86(5):556-564. doi: 10.1002/jemt.24294. Epub 2023 Jan 25.
Stenachroia elongella is an important pest of maize in Meghalaya, India. To understand the roles of sensory organs in the biological behaviors of this insect, we determined the structure and distribution of sensilla found on the antenna of both male and female S. elongella by scanning electron microscope. The antenna of both sexes is a filiform type, and the overall length of the female antenna is significantly longer than the male antenna. In both sexes, seven types and two subtypes of antennal sensilla are identified; sensilla trichodea, sensilla chaetica, sensilla styloconica, sensilla coeloconica, sensilla auricillica (I, II), sensilla squamiformia and Böhm sensilla. No sexual dimorphism on the specific occurrence of sensilla is observed. Probable functions are discussed based on their external morphology. These results would be helpful for further studies on TEM investigations, electrophysiological recordings, and behavioral studies. RESEARCH HIGHLIGHTS: Seven types and two subtypes of antennal sensilla were observed in both male and female Stenachroia elongella. Morphology and distribution of the antennal sensilla were discussed. Sexual dimorphism was observed on the overall length of the antenna where the female antenna is longer than the male antenna. No sexual dimorphism was observed on specific occurrences of antennal sensilla.
长角狭颊夜蛾是印度梅加拉亚邦玉米的一种重要害虫。为了解感觉器官在这种昆虫生物学行为中的作用，我们通过扫描电子显微镜确定了长角狭颊夜蛾雌雄两性触角上感觉器的结构和分布。两性的触角均为丝状，雌虫触角的总长度显著长于雄虫触角。在两性中，共鉴定出七种类型和两种亚型的触角感觉器；毛形感器、刺形感器、栓锥感器、腔锥感器、耳形感器（I型、II型）、鳞形感器和博氏感器。未观察到感觉器特定出现情况的两性差异。根据其外部形态对可能的功能进行了讨论。这些结果将有助于进一步开展透射电镜研究、电生理记录和行为研究。研究亮点：在长角狭颊夜蛾雌雄两性中均观察到七种类型和两种亚型的触角感觉器。讨论了触角感觉器的形态和分布。在触角的总长度上观察到两性差异，雌虫触角比雄虫触角长。在触角感觉器的特定出现情况上未观察到两性差异。
