The relationship among age, length and height of freshwatermussels has also been discussed in this report.
同时，还分析了淡水贝壳类年龄、长度、高度之间的相互关系。
2
Unionidae is an important group of freshwater benthos. Due to the convergence phenomenon of freshwatermussels, there is still much controversy in the classification of Chinese Unionidae.