Haisheng of bivalves, an important member of the from the Triassic to Jurassic little change. sea urchins from the beginning of the Jurassic occupy an important position.
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- 海生的菊石、双壳类、箭石仍为重要成员,六射珊瑚从三叠纪到侏罗纪的变化很小。棘皮动物的海胆自侏罗纪开始占据了重要地位。