双壳类,蚌类
Jurassic marine bivalve is very rich, non-marine bivalves also developed rapidly, and their continental formation on the division and correlation played an important role. 侏罗纪的海相双壳类很丰富，非海相双壳类也迅速发展起来，它们在陆相地层的划分与对比上起了重要作用。
