化石是由业余爱好者收藏的,他没有意识到他发现的化石的意义。
Romain Vullo of the University of Rennes, however,
法国雷恩大学的Romain Vullo却明白,
did-and he has brought the discovery to the attention of the scientific world in the pages ofNaturwissenschaften.
而他在《自然科学》杂志上的几页论文吸引了科学界的注意。
Ammonites were both predators and prey.
鹦鹉螺既是捕食者也是猎物。
They occupied a position in the Mesozoic oceans similar to that of modern squid.
他们生活在中生代的海洋中,跟现代乌贼相似。
Like squid, they were swimming tentacled molluscs-a group called the cephalopods.
跟乌贼一样,鹦鹉螺是游动的有触须的软体动物,属于头足纲动物。
Unlike squid, though, they had protective shells.
不像乌贼,鹦鹉螺有保护壳。
These shells were divided internally into gas-filled chambers.
这些保护壳的里面有充满气体的分隔小室。
The result had neutral buoyancy, allowing the animal to move by jet propulsion.
结果就是鹦鹉螺有浮力,让其像喷气发动机推进一样的运动,这点跟乌贼一样。
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