前裂长管茧蜂触角感器的扫描电镜观察

Antennal sensilla of Diachasmimorpha longcicaudata(Ashmead) observed with scanning electron microscopy

前裂长管茧蜂是许多实蝇类害虫幼虫-蛹期的重要寄生性天敌。通过扫描电镜对其触角感受器进行超微观察,结果发现,前裂长管茧蜂雌蜂触角共发现7种感受器,分别为鳞型感器、Bhm毛、毛型感器、腔型感器、栓锥型感器、钟型感器及板型感器。其中,毛型感器具有3种形态(毛型感器Ⅰ、Ⅱ、Ⅲ),锥型感器具有2种形态(锥型感器Ⅰ、Ⅱ),但在雄蜂触角上没发现锥形感器Ⅱ。毛型感器和板型感器是前裂长管茧蜂触角上的主要感器,数量较多,分布较广。

Diachasmimorpha longicaudata （Ashmea） （ Hymenoptera： Braconidae） is an obligate endo- parasitoid of third instar larvae of many fruit flies （Diptera： Tephritidae）. The antennal sensilla of D. longicaudata were observed with scanning electron microscopy. Seven distinct types of sense receptors were observed, including sensilla squamiformia, Btihm bristle, sensillum trichodea, sensilla coeloconica, sensillum styloconicum, sensillum campaniformium, and sensilla placodea. Three forms of sensillum trichodea （ ST I , ST Ⅱ and ST Ⅲ ） （ Str I , Str Ⅱ, Str Ⅲ） and two forms sensillum styloconicum （ SS I and SS Ⅱ） （Sst I and Sst Ⅱ ） were found. However, SS Ⅱ （ Sst Ⅱ ） were only observed on the antennal of female wasps. Sensilla trichodea and sensilla placodea were distributed widely on the antenna with large amount.