访花昆虫红腹毛蚊触角感器扫描电镜观察

【目的】本研究旨在明确访花昆虫红腹毛蚊Bibio rufiventris触角感器的类型和分布。【方法】通过扫描电镜(scanning electron microscope, SEM)观察红腹毛蚊雌、雄成虫触角感器的种类、数量和形态,比较雌雄个体间的差异。【结果】红腹毛蚊雌、雄成虫触角均包含3部分,分别为柄节、梗节和鞭节,其中鞭节由8个亚节组成。雌成虫触角平均总长度为862.556±78.662μm,雄成虫触角平均总长度为880.361±83.253μm,雌、雄成虫触角各亚节的长度几乎相似,只有鞭节第8亚节长度有显著差异。红腹毛蚊的触角感器共有4大类,即刺形感器、锥形感器、毛形感器和B?hm氏鬃毛。其中,雌性红腹毛蚊触角感器共有6种亚型,即刺形感器、毛形感器2型、锥形感器(1, 2和4型)和B?hm氏鬃毛;雄性红腹毛蚊触角感器共有5种亚型,即刺形感器、毛形感器1型、锥形感器(2和3型)和B?hm氏鬃毛。【结论】红腹毛蚊雌、雄成虫触角感器在种类、数量以及形态特征方面存在一定差异。本研究为进一步探究红腹毛蚊触角感器的生理功能及其行为活动的分子机制提供了形态学基础。

Observation of antennal sensilla of flower-visiting insectBibio rufiventris(Diptera:Bibionidae) with scanning electron microscope

【Aim】 This study aims to clarify the types and distribution of antennalsensilla of flower-visiting insect Bibio rufiventris. 【Methods】 The type, quantity andmorphology of antennal sensilla of B. rufiventris were observed with scanning electronmicroscope (SEM), and their differences between male and female adults were compared.【Results】 The female and male adult antennae of B. rufiventris include three parts, scape(Sc), pedicel (P) and flagellum (F), and the flagellum consists of eight flagellomeres. Theaverage lengths of antennae of female and male adults are 862.556±78.662 and880.361±83.253 μm, respectively. There is significant difference in the length of the8th flagellomere, while the lengths of other flagellomeres are almost equal. Four types ofsensilla including sensilla chaetica (Sc), sensilla basiconca (Sb), sensilla trichodea (St)and B?hm bristles (Bb) were observed on the female and male antennae. The antennalsensilla of female adults have six subtypes, i.e., sensilla chaetica (Sc), sensillatrichodea subtype 2 (St.2), sensilla basiconca subtypes 1, 2 and 4 (Sb.1, Sb.2 and Sb.4)and B?hm bristles (Bb), while those of male adults have five subtypes, i.e., sensillachaetica (Sc), sensilla trichodea subtype 1 (St.1), sensilla basiconca subtype 2 (Sb.2)and sensilla basiconca subtype 3 (Sb.3) and B?hm bristles (Bb). 【Conclusion】 The types,amounts and characteristics of antennal sensilla of B. rufiventris adults show some differences between females and males. This study provides a morphological basis forstudying the physiological functions of these sensilla and the molecular mechanisms ofbehavioral activities of B. rufiventris.