颈双缘姬蜂触角感受器的扫描电镜观察

Antennal Sensilla of Diadromus collaris Observed with Scanning Electron Microscope

为了明确颈双缘姬蜂Diadromus collaris(Gravenhorst)触角感受器的种类及分布,本试验对雌、雄蜂触角及感受器进行了扫描电镜观察。结果表明,颈双缘姬蜂触角具有毛形感受器、刺形感受器、锥形感受器、板形感受器和腔锥形感受器等5种感受器,其中毛形感受器分2种类型,锥形感受器分6种类型。毛形感器在雌蜂的触角上分布多于雄蜂,锥形感受器Ⅱ只分布于雄蜂的触角上,而锥形感受器Ⅲ、Ⅳ、Ⅴ和Ⅵ及腔锥形感受器仅分布在雌蜂上,板形感器在雄蜂的触角上分布多于雌蜂。本文对5类感受器的形态进行了详尽描述,并与其它寄生蜂的感受器进行了比较,同时对各类型感受器的功能进行了探讨。

Antennas of female and male Diadromus collaris （Gravenhorst） （Hymenoptera： Ichneumonidae） were observed by scanning electron microscopy （SEM） to specify the distribution and morphology of antennal sensilla. Five distinct types of sense receptor on the antenna of D. collaris, including sensilla trichodea, sensilla chaetica, sensilla basiconica, sensilla placodea and sensilla coeleoconica were found. Among them, sensilla trichodea was divided into two morphological sub-types which existed on the antennas of male and female D. collaris. More sensilla trichodea were observed on the antenna of female than male. Six sub-types of sensilla basiconica were identified, among which the types II was only found on the antenna of male, while type Ill, IV, V and VI were only found on the female antenna. More sensilla placodea were found on male antenna, in contrast, sensilla coeleoconica was only found with fewer amounts on female antenna. We did detailed descriptions on the five types of antennal sensilla and compared them with antennal sensilla of other parasitoids.