Abstract: To elucidate the types，morphological characteristics，distribution patterns，and sexual dimorphism of antennal sensilla in Euproctis pseudoconspersa，the ultrastructure of the antennae was systematically examined via scanning electron microscopy（SEM）. Concurrently，the sensillar types，morphologies，lengths，and basal diameters were meticulously measured and characterized. The results indicated that the antennae of both male and female adults of E.pseudoconspersa were bipectinate，with each antenna composed of three parts：the scape，pedicel，and flagellum. Female adults possessed 22 pairs of pectinations on the antennae，which outnumbered those of males（19 pairs）；however，the length of the pectinations in females（0.362 mm） was significantly shorter than that in males （0.468 mm）. A total of nine types of sensilla were observed on the antennae of both male and female adults，including
Böhm’s bristles（two subtypes），sensilla squamiformia，sensilla auricillica，sensilla coeloconica，sensilla basiconica，sensilla styloconica，sensilla trichodea（two subtypes），sensilla mammilliformia（two subtypes），and sensilla chaetica（two subtypes）. Among these，sensilla trichodea were the most abundant and widely distributed，and the number of sensilla trichodea subtype Ⅰ on male antennae（2 515.79 per antenna） was significantly greater than that on female antennae（1 825.89 per antenna）. The numbers of sensilla chaetica subtypes Ⅰ and Ⅱ in female adults were greater than those in male adults. The antennal sensilla of male and female adults of E.pseudoconspersa exhibited significant sexual dimorphism. These findings provide a morphological basis for an in⁃depth understanding of the chemical communication mechanisms of this species and for the development of green control technologies based
on behavioral regulation.

Key words: Euproctis pseudoconspersa, Antenna, Antennal sensilla, Scanning electron microscopy, Ultrastructure

摘要： 为明确茶毛虫（Euproctis pseudoconspersa）成虫触角感器的类型、形态特征、分布规律及雌雄差异，利用扫描电子显微镜（SEM）技术对茶毛虫雌雄成虫触角超微结构进行系统观察，对感器类型、形态、长度、基部直径等指标进行测量和描述。结果表明，茶毛虫雌雄成虫触角均呈双栉齿状，整个触角由柄节、梗节、鞭节三部分组成。雌成虫触角栉齿22 对，多于雄成虫（19 对），但雌成虫触角栉齿长度（0.362 mm）显著短于雄成虫（0.468 mm）。雌雄成虫触角共发现9类感器，包括Böhm氏鬃毛（2个亚型）、鳞形感器、耳形感器、腔锥形感器、锥形感器、栓锥形感器、毛形感器（2个亚型）、乳状感器（2个亚型）和刺形感器（2个亚型）。其中，毛形感器数量最多、分布最广，且雄虫触角毛形感器Ⅰ型数量（2 515.79个）显著多于雌虫（1 825.89个）。雌成虫刺形感器Ⅰ型和Ⅱ型的数量显著多于雄成虫。茶毛虫雌雄成虫触角感器存在显著的性二型现象，为深入理解茶毛虫化学通讯机制及开发基于行为调控的绿色防控技术提供了形态学基础。

关键词: 茶毛虫, 触角, 触角感器, 扫描电镜, 超微结构