![](http://www.ecns.cn/hd/2020/06/04/3bc1ff6d1a374abba7000da06c8e5ef3.jpg)
An effect image of the earliest known host-parasite relationship on the earth. (Photo provided to China News Service)
Scientists in China have unearthed fossil evidence of a 512 million-year-old worm-like creature that restricted the growth of marine invertebrates by feeding off their meals, providing the earliest known evidence of a host-parasite relationship.
![](http://www.ecns.cn/hd/2020/06/04/c8ade565a26a4d25b4a73ee631c76b94.jpg)
An effect image of the earliest known host-parasite relationship on the earth. (Photo provided to China News Service)
Scientists in China have unearthed fossil evidence of a 512 million-year-old worm-like creature that restricted the growth of marine invertebrates by feeding off their meals, providing the earliest known evidence of a host-parasite relationship.
![](http://www.ecns.cn/hd/2020/06/04/f09690fe3278441cb203bf9d0a3a6dbd.jpg)
Markings from a tube-shaped parasite are visible on a fossilized shell. (Photo provided to China News Service)
Scientists in China have unearthed fossil evidence of a 512 million-year-old worm-like creature that restricted the growth of marine invertebrates by feeding off their meals, providing the earliest known evidence of a host-parasite relationship.