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According to the conodont and fusulinid fossils,their ages are determined to be Devonian-Permian.

根据所含化石确定代为泥盆纪至二叠纪。

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PBS地球-动物趣闻

And conodonts were all of those things -- abundant, widespread, and composed of lots of distinctive species.

刺就是所有这些——数量丰富、分布广泛,并且由许多独特物种组成。

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PBS地球-动物趣闻

So conodont elements quickly became one of the handiest tools in the geologist toolkit.

因此,刺元素迅速成为地质学家工具包中最方便工具之一。

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PBS地球-动物趣闻

In fact, many subdivisions of the Paleozoic are actually defined by when certain conodont species first or last appear.

事实上,古生代许多细分实际上是根据某些石物种首次或最后出现来定义

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PBS地球-动物趣闻

But conodont elements can do more than just that!

刺元素可以做止于此!

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PBS地球-动物趣闻

It was only marginally more fish-like than its earlier relatives, hagfish and conodonts, with which it shared a common ancestor.

它只比它早期亲戚盲鳗刺更像鱼,它们与它们有一个共同祖先。

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PBS地球-动物趣闻

Likewise, in the Triassic Period, nearly every age is defined by the first appearance of various conodonts.

同样,在三叠纪期,几乎每个代都由各种首次出现来定义。

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PBS地球-动物趣闻

It turns out that conodont elements actually change color when they're heated up.

事实证明,刺元素在受热实际上会改变颜色。

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PBS地球-动物趣闻

But meanwhile, paleontologists still had no idea what kind of animals conodonts were.

但与此同,古生物学家仍然知道刺是一种什么样动物。

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PBS地球-动物趣闻

So it turned out that they weren't conodont animals; they were fossils of creatures that ate conodont animals!

所以事实证明它们石动物;它们是吃动物生物化石!

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PBS地球-动物趣闻

But while paleontologists were spending a hundred years or so debating what conodonts were, geologists were discovering what conodonts could do.

但是, 当古生物学家花了大约一百年争论什么是,地质学家正在发现作用。

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PBS地球-动物趣闻

But further study revealed that the conodont elements found in those fossils were actually in the animals' guts.

但进一步研究表明,在这些化石中发现刺元素实际上存在于动物内脏中。

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PBS地球-动物趣闻

In the 1970s, fossils of some vaguely fish-like creatures were found in Montana that were thought to be conodont animals.

在 20 世纪 70 年代,在蒙大拿州发现了一些被认为是动物隐约鱼类生物化石。

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PBS地球-动物趣闻

Please allow me to introduce you to the conodonts.

请允许我向您介绍刺。

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PBS地球-动物趣闻

Thanks to these beautiful specimens, we were able to learn that conodont animals were a kind of fish after all!

多亏了这些美丽标本,我们才知道动物毕竟是一种鱼!

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PBS地球-动物趣闻

So they were given the name conodont, which means " cone tooth." These elements are all verrry tiny.

因此,它们被命名为石,意思是“圆锥齿”。这些元素都非常小。

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PBS地球-动物趣闻

Like modern lampreys and hagfish, conodonts were jawless fish, and they were one of the earliest and most successful groups of vertebrates.

像现代七鳃鳗盲鳗一样, 刺是无颌鱼,它们是最早最成功脊椎动物群之一。

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PBS地球-动物趣闻

Their final extinction brought an end to 300 million years of conodonts' role as a cornerstone of the world's ocean communities.

它们最终灭绝结束了 3 亿年来刺作为世界海洋群落基石作用。

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《分钟地球》趣味科普(精选双语)

One hundred million years later, the warm, shallow seas were packed with tiny plants and animals — essentially, hors d'oeuvres for a plethora of bigger creatures like trilobites, conodonts, brachiopods, and corals.

一千万年之后,温暖浅海充满了微小植物动物——基本上是大量大型生物开胃菜,如同三叶虫,虫,腕足类珊瑚。

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PBS地球-动物趣闻

And the fossils also revealed that the tiny, tooth-like conodont elements were concentrated in the animal's mouth -- but also in its throat!

化石还显示,细小、类似齿刺元素集中在动物嘴里——但也在它喉咙里!

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PBS地球-动物趣闻

Throughout their history, conodonts were affected by several mass extinctions, including the Great Dying at the end of the Permian Period 252 million years ago.

纵观它们历史, 动物受到了几次大规模灭绝影响,包括 2.52 亿年前二叠纪末期大灭绝。

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