Cullen M J
Philos Trans R Soc Lond B Biol Sci. 1975 Oct 30;271(914):491-7. doi: 10.1098/rstb.1975.0063.
The ultrastructure of the trochanteral depressor muscle of the oriental rat flea is described. It is shown to be similar to that of the tubular leg muscles of other insects except in the volume and arrangement of the sarcoplasmic reticulum. The sarcoplasmic reticulum occupies approximately 18% of the volume of the muscle fibres. It is in three configurations:a regular array of parallel tubules opposite the A-band, a collar of sacculi involved in the formation of the dyads at the edge of the A-band and a loosely woven arrangement of tubules around the I-band. This tripartite arrangement of the sarcoplasmic reticulum and its large surface area is discussed in relation to the action of the muscle as the main propulsive muscle in the jump of the flea.
描述了东方鼠蚤转节降肌的超微结构。结果表明，除了肌浆网的体积和排列外，它与其他昆虫的管状腿部肌肉相似。肌浆网约占肌纤维体积的18%。它有三种形态：在A带相对处有规则排列的平行小管，在A带边缘参与二联体形成的囊泡环，以及围绕I带的松散编织的小管排列。结合该肌肉作为跳蚤跳跃主要推进肌的作用，讨论了肌浆网的这种三重排列及其大表面积。
