Li Ya-Ya, Shao Kai-Min, Liu Deguang, Chen Li
College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, China.
College of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding, China.
Microsc Res Tech. 2022 Apr;85(4):1588-1596. doi: 10.1002/jemt.24020. Epub 2021 Dec 11.
Morphology, microstructure, and distribution of antennal sensilla were compared between female and male Pseudosymmachia flavescens (Brenske) (Coleoptera: Scarabaeidae: Melolonthinae). Lamellate antennae of P. flavescens were shown to have typical scape, pedicel, and flagellum segments. The flagellum consists of a four-segmented funicle and a three-segmented club. The lengths of their pedicel and funicle were found to be similar in females and males. Distinct sexual differences were observed in the length of lamellar segments. Nine types/subtypes of sensilla were identified on the antennae of both sexes, including Böhm sensilla, sensilla trichodea, sensilla basiconica (SB), and two subtypes for sensilla chaetica, sensilla coeloconica, and sensilla placodea each. Olfactory sensilla (e.g., SB and placodea) are mainly located on three lamellar segments of the antennal club. Variation was also seen in abundance of various types of antennal sensilla, with males possessing significantly more sensilla than females. Sensilla placodea were the most abundant, and their number in males was twice of that in females, showing a clear sexual dimorphism. The difference in the distribution of sensilla placodea might reflect their roles in sexual chemical communication.
比较了黄褐伪鳃金龟（Brenske）（鞘翅目：金龟科：鳃金龟亚科）雌虫和雄虫触角的形态、微观结构及感器分布。结果表明，黄褐伪鳃金龟的鳃叶状触角具有典型的柄节、梗节和鞭节。鞭节由四节的索节和三节的棒节组成。发现雌虫和雄虫的梗节和索节长度相似。在鳃叶节段的长度上观察到明显的性别差异。在两性触角上共鉴定出9种类型/亚型的感器，包括博氏感器、毛形感器、锥形感器（SB），以及毛形感器、腔锥感器和板形感器各有两个亚型。嗅觉感器（如SB和板形感器）主要位于触角棒节的三个鳃叶节段上。不同类型触角感器的数量也存在差异，雄虫的感器数量明显多于雌虫。板形感器数量最多，雄虫的数量是雌虫的两倍，呈现出明显的两性异形。板形感器分布的差异可能反映了它们在性信息化学通讯中的作用。
