黑肩绿盲蝽口器的结构和感器

Structure and sensilla of the mouthpart of Cyrtorhinus lividipennis reute(Hemiptera: Miridae)

黑肩绿盲蝽Cyrtorhinus lividipennis Reute是水稻飞虱和叶蝉的重要天敌。为了更好的探讨这种盲蝽的取食行为,本研究在扫描电镜下观察了黑肩绿盲蝽口器及其感器的超微结构。结果表明黑肩绿盲蝽口针束由1对上颚针和1对相互连锁的下颚针构成。上颚口针具两排脊状突起,并通过连锁机制紧密的嵌合在一起,形成了中空的食物道和唾液道。下颚口针内侧边缘具两排与口针末端方向一致的锐利齿状结构。黑肩绿盲蝽口器上可观察到毛形感器Ⅰ(TSⅠ)、毛形感器Ⅱ(TSⅡ)、锥形感器(BS)和多孔钉形感器(MPGS),大都分布于口器下唇,尤其在下唇端部可见锥形感器密集分布。研究结果对今后进一步探讨这种天敌的食性和取食行为有重要意义。

Cyrtorhinus lividipennis Reute(Hemiptera:Miridae)is the predator of planthoppers and leafhoppers in paddy fields.To better understand the feeding behaviour of this mirid,the mouthpart stylets and sensilla were investigated with scanning electron microscopy.The stylet bundle of the mirid consists of two mandibular stylets and two maxillary stylets.The maxillary stylet has two rows of recurved barbs.The two pairs of maxillary stylets are pressed closely together and the separate salivary and food canals pass between them.The maxillary stylet has two rows strongly serration on the inner surface pointing away from the head.It was found that the mouthpart had trichoid sensillaⅠ(TSⅠ),trichoid sensillaⅡ(TSⅡ),basiconica sensilla(BS)and multiporous peg sensilla(MPGS).At the terminal of the larbium,there are close-set basiconica sensilla(BS).The results will be of great significance for future study of feeding behaviour in this mirid.