雙殼類,蚌類
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. 侏羅紀的海相雙殼類很豐富，非海相雙殼類也迅速發(fā)展起來，它們在陸相地層的劃分與對比上起了重要作用。
