不过，在20世纪80年代，古生物学者发现了完整的牙形刺化石标本，而直到最近科学家们才开始揭露出它们的秘密。
In the 1980s, however, paleontologists found full fossilized conodont specimens, and only recently have scientists begun to unravel their secrets.
牙形刺之所以仍然如此神秘，一个原因就是除了发现过它们的牙齿化石以外，它们柔软的躯体无法变成化石保存到今天。
One reason why conodonts have remained so enigmatic, despite the fossil finds, is that their soft bodies didn't leave much to make fossils.
主要的生物化石发育于台地相灰岩中，包括蜓类、牙形石等个体较大化石；
Main oryctocoenose preserved in limestone of platform facies includes various types of large bodies, such as Schwagerina subnathorsti(Lee), S. sp.
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