Sundararaman V, Nadakal A M
Cell Tissue Res. 1979 Oct;201(3):479-86. doi: 10.1007/BF00237006.
The electron microscopic study of the tail of Cercaria chackai reveals that it contains four sets of striated muscle bundles located central to the nonstriated circular and longitudinal muscles. The striated muscle consists of longitudinally oriented lamellar myofibres. Each myofibre contains a single "U" shaped myofibril. The banding pattern is analogous to that of vertebrate striated muscle. The sarcolemma is a simple surface membrane. There are no transverse tubular extensions of sarcolemma. The sarcoplasmic reticulum (SR) is very well developed with cisternae, tubules, and vesicles. SR cisternae form dyadic couplings with the sarcolemma. There is a set of flattened tubules of SR origin traversing the myofibril exactly at the Z region. These tubules are unique to the striated muscle of the cercarian tail and may have functional significance. A diagrammatic reconstruction of the myofibre is presented.
查氏尾蚴尾部的电子显微镜研究显示，其包含四组横纹肌束，位于无横纹的环形和纵形肌的中央。横纹肌由纵向排列的板层状肌纤维组成。每条肌纤维含有一条单一的“U”形肌原纤维。条纹模式类似于脊椎动物的横纹肌。肌膜是一层简单的表面膜。没有肌膜的横向管状延伸。肌浆网（SR）发育良好，有池、小管和小泡。SR池与肌膜形成二元连接。有一组起源于SR的扁平小管正好在Z区域穿过肌原纤维。这些小管是尾蚴尾部横纹肌所特有的，可能具有功能意义。文中给出了肌纤维的示意性重建图。
