暗黑鳃金龟触角超微结构

Ultrastructure of the antennal sensilla of Holotrichia parallela

利用扫描电镜对暗黑鳃金龟(Holotrichia parallela)雌、雄成虫的触角形态和感器进行了观察。结果表明:暗黑鳃金龟触角分为4部分,即柄节、梗节、鞭节棒状部和鳃状部,其中鞭节棒状部由5节组成,鳃状部由鞭节末端3节扩展构成。暗黑鳃金龟触角感器共7种,分别为板形感器、腔锥感器、腔形感器、刺形感器、毛形感器、锥形感器和Bhm氏鬃毛。雌、雄个体之间触角感器的类型、分布均没有明显差异。不同感器在触角各节上的数量与分布各不同。

The antennal morphology and sensilla of Holotrichia parallela （Coleoptera： Melolonthidae） were stud- ied using scanning electron microscopy. The results showed that the antenna consists of the scape, pedicel and flagellomere that is composed of funicle and lamellae. Funicle has five joints and lamellae three joints terminally. The antennae of H. parallela contain seven kinds of sensilla, namely sensilla placodea, sensilla coeloconica, sensil- la cavitica, sensilla chaetica, sensilla trichodea, sensilla basiconica and Bohm bristles. No difference was found in the type and distribution of the sensilla between the male and female adults. The quantity and distribution of each sensillum, however, were different in different segments of the antennae.