鸣鸣蝉（Oncotympana maculaticollis Motsch）发声肌中肌原纤维的双阵列结构及莫发声原初过程的分析

给出了鸣鸣蝉发声肌肌原纤维的双阵结构，其肌纤维中并存两种不同阵列的“快”和“慢”劝肌原纤维不同，分别为３：１和５：１。明显区别于单音调鸣声的蝉类发声肌肌原纤维的ＲＴＴＦ为３：１的单阵列，即与鸣鸣蝉变音调声产生的原初机制相适应。

BILATTICE STRUCTURE OF THE MYOFIBRIL OF SOUNDING MUSCLE AND ANALYSIS OF THE ORIGINAL PROCESS OF SOUND-PRODUCTION IN Mingming CICADA(Oncotympana maculaticollis Motsch)

The myofibril bilattice structure of sounding muscle in Mingming cicada is given in this paper, and there exist simultaneously two kinds of myofibril,the fast-speed and slow-speed myofibril (FSM and SSM), in sounding muscle fibels. Although the FSM and SSM have identical framerks consisting of thick filaments,the ratios of thin-to -thick filaments(RTTF) are different, i.e. 3.1 and 5.1, respectively. This kind of bilattice structure differs obviously from the myofibril monolattice structure with the RTTF at 3:1 of sounding muscle of cicadas singing in mono-toned song. So, such structure in Mingming cicada is adapted to the original mechanism of vari-toned song production.