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Urokodia! 518-million-year-old fossil shows beginning of spider's bite

A 518-million-year-old fossil is rewriting the history of spider evolution

By · Published July 3, 2026  04:04 UTC · Updated July 7, 2026  23:27 UTC

6sources
6articles
4velocity
+0%since first seen
119d agofirst detected
Text:
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61/100 Strong
6distinct sources shown
40velocity measurements
1language editions checked
All brief claims passed the second-source checkbrief evidence status

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Fossils of the ancient sea creature Urokodia provided the earliest evidence of spider fangs, dating back 518 million years. This discovery shed light on the origin of chelicerae and book gills of Chelicerata.

Epilogue added 114d ago, after coverage quieted.

Quick answers

What is Urokodia?

Urokodia is an ancient sea creature whose fossil shows the earliest evidence of spider fangs.

How old is the Urokodia fossil?

The Urokodia fossil is 518 million years old.

What does this discovery tell us about spider evolution?

The discovery of Urokodia pushes back the origins of spider fangs by millions of years, providing new insights into the evolution of chelicerae and book gills of Chelicerata.

The brief

⚡ Executive Intelligence Takeaways Corroborated across 6 independent newsrooms
  • Velocity & Diffusion: Coverage exploded across 6 distinct news outlets with 6 published articles, achieving a live velocity of 4.
  • Primary Driver: A 518-million-year-old fossil is rewriting the history of spider evolution
  • Predictive Outlook: Archynetys algorithmic models forecast this story will fade from trending status over the next 24 hours.
  • Source Integrity: Verified strictly against primary headline reporting under zero-hallucination protocols.

A fossil of Urokodia, an ancient sea creature, has revealed the earliest known evidence of spider fangs. The discovery pushes back the origins of spider fangs by millions of years.

Coverage from ScienceAlert, Sci.News, IFLScience, The Conversation, Nature and Phys.org emphasizes the significance of this fossil in understanding the evolution of chelicerae and book gills of Chelicerata. The Conversation discusses the fear factor associated with spider fangs.

Watch for further analysis on how this discovery fits into the broader context of arthropod evolution. Coverage does not yet specify whether additional fossils of Urokodia have been found.

Synthesized by Archynetys from the headlines below under a strict no-invention contract. ✓ fact-checked: all claims supported by sources Updated 118d ago.

Sources (6)

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Topics

Urokodia spider evolution fossil discovery Chelicerata paleontology ancient sea creatures

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