Archive · 8 Dec 2025
520mn-year-old fossil discovery reveals ancient arthropod ancestor
Scientists found a super old fossil in China that is 520 million years old.
This fossil is special because it has tiny parts like a brain, nerves, and even a digestive system all preserved.
It's like a baby version of animals we know today, such as crabs and spiders.
The scientists used really cool technology to scan the tiny fossil and see all these details.
They are excited because this helps them learn more about how these animals evolved over time.
The fossil is now kept at Yunnan University in China.
Scientists discovered a 520-million-year-old fossil in China with preserved internal organs.
The fossil, named Youti yuanshi, is linked to modern arthropods like crabs and spiders.
Advanced scanning technology revealed the fossil's brain, nerves, digestive glands, and circulatory system.
The fossil is extremely tiny and belonged to an arthropod larva.
The discovery is significant for understanding the evolution of arthropods.
- Who
- Scientists from the University of Durham
- What
- Discovered a 520-million-year-old fossil with preserved internal organs
- When
- Not specified (published in Nature)
- Where
- China
- Why
- To understand the evolution of arthropods
- Fossil Name
- Youti yuanshi
- Age
- 520 million years
- Discovery Location
- China
- Research Team
- University of Durham
- Published In
- Nature
- Modern Relatives
- Crabs, lobsters, spiders, insects, centipedes
- Fossil Type
- Arthropod larva
- Preserved Features
- Brain, nerves, digestive glands, circulatory system, legs, eyes