Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Institute of Entomology, Guizhou University, Guiyang, PR China.
College of Animal Science of Guizhou University, Guizhou University, Guiyang, PR China.
PLoS One. 2024 Aug 29;19(8):e0309670. doi: 10.1371/journal.pone.0309670. eCollection 2024.
The antennal sensilla play an important role in many behavioral activities of insects. The fungivorous beetle Triplax ainonia Lewis (Erotylidae) is an important pest which prefers to feed on Pleurotus mushrooms. In order to clarify the types, number, and distribution of the antennal sensilla of male and female T. ainonia, scanning electron microscopy was used. The results showed that there were five sensillum types on the antennae of adults male and female, including Böhm's bristles (BB), sensilla chaetica (three subtypes: SC 1, SC 2, and SC 3), sensilla basiconica (three subtypes: SB 1, SB 2, and SB 3), sensilla trichodea (ST), and sensilla styloconica (SS). Among all the sensilla, the number of SB 2 was the most abundant in both sexes. We found that there was no sexually dimorphic in the sensillum types, but there were differences in the number, lengths, and diameters of some sensilla between males and females. Based on the information of the morphology and distribution of the sensilla, the potential functions of the antennal sensilla of T. ainonia adults were discussed. The results of this study provide a basis for further study on the behavioral ecology and electrophysiology of the fungivore beetles of the Erotylidae.
触角感器在昆虫的许多行为活动中起着重要作用。食菌金龟子 Triplax ainonia Lewis（Erotylidae）是一种重要的害虫，它喜欢以金针菇为食。为了阐明雌雄 T. ainonia 触角感器的类型、数量和分布，我们使用扫描电子显微镜进行了研究。结果表明，雌雄成虫触角上有 5 种感器类型，包括 Böhm 鬃毛（BB）、刚毛感器（3 个亚型：SC1、SC2 和 SC3）、锥形感器（3 个亚型：SB1、SB2 和 SB3）、毛形感器（ST）和刺形感器（SS）。在所有感器中，SB2 的数量在两性中最为丰富。我们发现，感器类型没有性别二态性，但在一些感器的数量、长度和直径上存在雌雄差异。基于感器的形态和分布信息，我们讨论了 T. ainonia 成虫触角感器的潜在功能。本研究结果为进一步研究 Erotylidae 食菌金龟子的行为生态学和电生理学提供了依据。
