英式:[ˈbaɪvælvz]
美式:[ˈbaɪvælvz]

双壳类,蚌类

Jurassic marine bivalve is very rich, non-marine bivalves also developed rapidly, and their continental formation on the pision 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。