德国小蠊触角感器的扫描电镜观察

Observation on the antennal sensilla of Blattella germanica with scanning electron microscope

用电子显微镜观察德国小蠊Blattella germanica(L.)雌成虫、雄成虫、老熟若虫和低龄若虫的触角,发现其上分布有大量感器,为刺形感器(Ⅰ、Ⅱ型)、锥形感器、毛形感器、弧形感器、帽形感器、边缘感器和椭圆感器。其中刺形感器(Ⅰ、Ⅱ型)、锥形感器、毛形感器、弧形感器和边缘感器在各种虫态均有分布,帽形感器仅见于成虫触角鞭节上。在各种不同虫态中,雌雄成虫含有所有种类的感器,老熟若虫触角亚节数最多,低龄若虫的各类感器的感毛长度和基部横径普遍较小。

Antennal sensilla of adult and nymph Blattella germanica （L.）were observed by scanning electron microscope. It was found that there were a large number of sensilla on the antennas; they are sensilla chaetica （type Ⅰ and Ⅱ）, sensilla basiconica, trichoid sensilla, cambered sensilla, campaniformia sensilla, marginal sensillum, and elliptical sensilla. Among of them, six sensilla, i.e. chaetic sensillum I and II, sensilla basiconica, trichoid sensilla, cambered sensilla and marginal sensillum, were found in the insect in all stages. Hat block sensillum was only found on adults. Male and female adults have all types of sensilla. The antenna of mature nymph beared most segments, while young nymph＇s sensilla had minimum length and base diameter.