...；沉积环境；双壳类；青海南部 [gap=12533]Key words: Chibuzhang Lake; Middle Jurassic; depositional environment; bivalves; southern ...
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... specific leaf weight - 比叶重量 mussels - 双壳类 exponential growth - 指数生长；指数增长 ...
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下部富含菊石Kashmirites、Meekoceras、Ophiceras及双壳类(Claraia)等。本群与飞仙关组为相变关系,与下伏上二叠统大隆组或长兴组呈整合接触
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例如，海星捕食各种双壳类软体动物，防止这些双壳类动物独占海底的栖息地。
For example, sea stars prey on a variety of bivalve mollusks and prevent these bivalves from monopolizing habitats on the sea floor.
稍有心脏状掘沙的双壳类软体动物。
调查期间采到的软体动物已鉴定52种，其中腹足类45种，双壳类7种。
Among 52 species of mollusca identified, 45 were gastropods, 7 were bivalves.
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