美洲大蠊尾须背面超微形态的观察

Observations on the Micromorphology of Cercal Dorsum of Periplaneta americana L.

尾须为蜚螃腹部未端的一对刺形附属构造，在肉眼下腹面隆起、背面光滑；在解剖镜下可见腹面有“毛刺”、背面平滑．在扫描电镜下观察可见美洲大蠊尾须背面也有许多特殊构造，其中有节间突起、刺形感器A，此外尚观察到凹窝状构造和丝状物．该丝状物类似有毛感受器，其内部构造和功能有待进一步研究由于尾项背面具有刺形感器A,说明它亦具有机械感受功能．

Cerei are a pair of structures on the end of abd0Inen of Periptansta aInericarLa, they have a smooth dorm and an arched swollen abdomen, where there are a lot of 'thorns'with a naked eye or under anatodric thecroscopy. A great deal of specific structures can be seen on the dorsum of cercus by SEM. These include pits and silk like structures besides knobs between segments and chcaic sensillum A. It seems that the pits and silk - like structhes are sensorv organs but need more certification. The dorsum of cereus of Peoplaneta wtana may also has mechanic sensory function because there are cheatic sensillum A on it.