518 million years ago, one tiny sea creature may have started the evolution of the fangs seen in spiders today

Scientists have identified the earliest known evidence of spider fangs in a 518 million-year-old fossil recovered from southern China, tracing the origin of one of the animal kingdom's most feared biological tools back to a small marine creature that lived long before spiders existed. The fossil belongs to a species called Urokodia aequalis, examined by researchers from Yunnan University and the University of Leicester using X-ray imaging techniques that revealed soft tissue structures preserved inside the rock.

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