Sun Da, Luo Yang, Wang Yikang, Cui Hongle, Gou Yanting, Zhou Juan, Luo Bo, Liu Hui, Yan Rong, Wang Lingjun
Department of Parasitology, Zunyi Medical University, Zunyi 563000, China.
NHC Key Laboratory of Parasite and Vector Biology, National Institute of Parasitic Diseases, Chinese Center for Diseases Control and Prevention, Shanghai 200025, China.
Insects. 2025 May 20;16(5):539. doi: 10.3390/insects16050539.
, a vector of , is associated with an increasing incidence of thelaziasis. The complex habitat and chemosensory system of are critical for its proliferation and expansion. However, ultrastructural data across developmental stages remain limited. This study used scanning electron microscopy to examine the ultrastructure of developmental stages, with a focus on head sensilla. The results showed that the eggs of are dark brown and cylindro-oval. The larvae are vermiform, divided into 11 segments. The pupae are marked by a conspicuous respiratory tubercle, and the posterior spiracle contains three distinct spiracular slits. Among five types of sensilla (trichoid, intermediate, chaetica, coeloconic, and basiconic), coeloconic, intermediate, and trichoid sensilla were predominantly found on the antennae, while basiconic and chaetica sensilla were distributed on both the antennae and the maxillary palps of . The analysis revealed that the absence of dorsal appendages on the eggs distinguishes from . Males have longer antennae and exhibit sexual dimorphism in the length of sensilla (ChII, TB, and LB). This study provides the first comprehensive ultrastructural characterization of developmental stages and head sensilla, laying a foundation for species identification and olfactory system research.
作为[某种生物]的传播媒介，与盘尾丝虫病发病率的上升有关。[该生物]复杂的栖息地和化学感应系统对其增殖和扩散至关重要。然而，跨发育阶段的超微结构数据仍然有限。本研究使用扫描电子显微镜检查[该生物]发育阶段的超微结构，重点是头部感器。结果表明，[该生物]的卵呈深褐色，圆柱形至椭圆形。幼虫呈蠕虫状，分为11节。蛹的特征是有明显的呼吸瘤，后气门有三个明显的气门裂。在五种类型的感器（毛形、中间型、刺形、腔锥形和锥形）中，腔锥形、中间型和毛形感器主要分布在触角上，而锥形和刺形感器分布在[该生物]的触角和下颚须上。分析表明，卵上无背附器可将[该生物]与[另一生物]区分开来。雄性触角更长，在感器长度（ChII、TB和LB）上表现出性二态性。本研究首次全面描述了[该生物]发育阶段和头部感器的超微结构，为物种鉴定和嗅觉系统研究奠定了基础。
