山核桃透翅蛾幼虫头部感器扫描电镜观察

摘要

The morphology and distribution of the larval head sensilla of Sphecodoptera sheni (Arita &Xu)were studied by using scanning electron microscopy.The results showed that the head structure type of the larvae was hypognathous.The head contained antennae,ocellus,labrum,labium,mandible,maxilla,spinneret and so on. Three kinds of sensilla were found on antennae of the larvae:the basal scape is devoid of sensilla,and the pedicel possesses three sensilla chaetica and two sensilla basiconica.The terminal flagellum carried one sensillum styloconi-cum and one sensilla basiconica distally.Seven types of sensilla were found on the mouthparts:sensilla chaetica were widespread and abundant;sensilla basiconica and Bhm bristles were mainly located on the maxillary palp and galeae;sensillum styloconicum were found on the galeae and labial palp;sensilla basiconic-mastoid were loca-ted on the galeae;sensilla squamiformia were found on the lateral margin of the basal segments of labial palp,and sensilla furcatea were only present on the labrum.%利用扫描电镜对山核桃透翅蛾幼虫头部感器的形态和分布进行了观察。结果表明：山核桃透翅蛾幼虫的头为下口式，头部有触角、单眼、上唇、下唇、上颚、下颚、吐丝器等。触角上有3种感器：其中柄节无感器；梗节具有3个刺形感器，2个锥形感器；鞭节上有1个栓锥形感器和1个锥形感器。口器附肢上有7种感器：刺形感器分布广，数量多；锥形感器和 Bhm 氏鬃毛主要分布在下颚须、颚叶；栓锥形感器位于颚叶、下唇须；锥乳头感器分布于颚叶；鳞形感器位于下唇须基部侧缘；叉形感器仅存在于上唇上。