钝突刺腹牙甲摩擦发音器的微细结构及发音机制

为了解钝突刺腹牙甲Hydrochara affinis的摩擦发音器微细结构并探讨其发音机制，于东北林业大学帽儿山实验林场采集实验标本，利用扫描电镜（scanning electron microscope，SEM）观察钝突刺腹牙甲摩擦发音器微细结构，并采用实验促使发音方法探讨它的发音机理。结果显示:钝突刺腹牙甲的雌、雄成虫都具有摩擦发音器，雌虫的发音锉平均长为（15.86±7.60）mm，宽为（162.10±81.70）μm；雄虫发音锉平均长为（14.28±7.20）mm，宽为（142.00±43.50）μm。虫体通过摩擦后翅径脉-鞘翅产生声音。钝突刺腹牙甲雌、雄成虫发音主要用于个体间通信，发音机制属于后翅径脉-鞘翅模式。

Fine structure and mechanisms of stridulatory organs in Hydrochara affinis

Since no reports on the structure and sound formation of Hydrophilidae have been found in Chinese, Hydrochara affinis was used as an example to study the fine structure of Hydrophilidae stridulatory organs. Many specimens were collected from the state forest farm of Northeast Forestry University, and observations were made with a scanning electron microscope (SEM). Results showed that both males and females had stridulatory organs. The stridulatory organ size was (15.86±7.60) mm long and (162.10±81.70) μm wide for females but (14.28±7.20) mm long and (142.00±43.50) μm wide for males. The mechanisms of pronunciation for this kind of stridulatory organ were the same as in the model of the underwing radius vein-elytra. Thus, the pronunciation used may be for communication among different individuals of H. affinis.